MDCAT Chemistry The Halogens and Noble Gases Online Test

Page 1 of 14

Chemistry

1. The spectrum of helium is expected to be similar to that of

Na

Li⁺

He⁺

H

2. The important ore of lead is

Bauxite

Haematite

Chalcopyrites

Galena

3. Which one of them is monoatomic?

Nitrogen

Neon

Oxygen

Fluorine

4. Which element react directly with Kr, Xe and Rn?

F

O

Br

U

5. Identify the correct statement

Elemental Na is insoluble in NH₃

Elemental Na is a strong oxidizing agent

Elemental Na is easily oxidized

Element sodium can be prepared and isolated by electrolyzed an aqueous solution of NaCl.

6. Which gas can support combustion?

CO₂

N₂

N₂O

CO

7. Alkali metals are generally extracted by

Electrolytic methods

Double decomposition methods

Reduction methods

Displacement methods

8. White enamel of our teeth is

CaF₂

CaCl₂

CaBr₂

Ca₃(PO₄)₂

9. Which one among the following form maximum number of compounds?

Xe

Kr

Ar

Rn

10. Which is true about the electro negativity order of the following?

P > Si

Br > Cl

Sr > Ca

C > N

11. A solution of sodium metal in liquid ammonia is strongly reducing due to the presence of

Sodium hydride

Sodium atoms

Solvated electrons

Sodium amide

12. Two elements whose electro negativities are 1.2 and 3.0, the bond formed between them would be

Ionic

Metallic

Covalent

Coordinate

13. Which among the following species has the highest ionization energy?

Ne

F

Li

B

14. Among the halogens the rare element is

Astatine

Fluorine

Iodine

Chlorine

15. AlCl₃ flumes in moist air because

HCl is formed in moist air

It is very volatile

It is highly hygroscopic

It is covalent

16. Because of its small size and due to restriction of its valence shell to an octet fluorine differs from other halogens, which behavior of fluorine is incorrect?

It has highest first I.E

It is more reactive than other halogens

It has highest E.N

It restricts to oxidation state – 1 only

17. Mark the element which shows greatness inert pair effect

Chlorine

Bromine

Fluorine

Iodine

18. Polyanion formation is maximum in

Nitrogen

Sulphur

Oxygen

Boron

19. The substance not likely to contain CaCO₃ is

Sea shells

Dolomite

A marble states

Calcried gypsum

20. Which of the following has the least ionization potential?

Zn

N

He

Li

21. Which noble gas is used in infilament bulbs to stop the filament burning out too quickly?

Helium

Neon

Argon

Krypton

22. The lowest boiling point of helium is due to its

High polarisability

Inertness

Weak van der Waals forces between atoms

Gaseous nature

23. NaoH is named as caustic soda because

It is used in soda water

It corrodes the organic tissues

It reacts with chlorine gas

It reacts with fats to form soap

24. The element with highest electron affinity among the halogen is

Br

Cl

F

I

25. Number of elements present in 5th period is

32

18

24

8

Page 2 of 14

26. Hydrogen fluorine is a lipid unlike other hydrogen halides because

Fluorine is highly reactive

Fluorine atom is smaller in size

HF molecules form intermolecular H-bonds

HF is the weakest acid

27. Which halogen is most electropositive?

Br

Cl

I

F

28. The halogen which has only one oxidation state is

I

Cl

F

Br

29. Fluorine differs from other halogens due to

All

Low first ionization energy

High dissociation energy

Small size

30. Cl₂O₇ is best prepared by passing by

Chlorine gas over hot HgO

Chlorine and oxygen over hot silver chlorate

Hydrogen chloride over phosphorus pentoxide

Perchloric acid (CHIO₄) over hot silver oxide

31. Which of the following has highest dipole moment?

SbH₃

NH₃

PH₃

AsH₃

32. Alkaline earth metals show standard electrode potential values which are very similar to their alkali metals due to

High lattice energy of M²⁺ ions in the solid state

Diamagnetic nature

None of these of M²⁺ ions

High energies of hydration of M²⁺ in solution

33. Which one boric acid is stable one?

H₂B₄O₇

H₃BO₃

HBO₃

None of these

34. The melting point in lowest for

Sr

Mg

Be

Ca

35. Select the weakest acid among the following

HCl

HF

HBr

HI

36. Sodium sulphates is solute in water but barium sulphates is insoluble because

The lattice energy of BaSO₄ is more than its hydration energy

The lattice energy has no role to play in solubility

Both a and b

The hydration energy of Na₂SO₄ is more than its lattice energy

37. All the following decompose easily on heating to give oxygen except

Manganese dioxide

Mercuric oxide

Potassium chlorate

Lead nitrate

38. Which of the following statements is not correct for a noble gas?

Half-life of Rn is only 3-8 days

Ne is obtained during radioactive disintegration

HE is used in producing very low temperatures

Ar is used in electric bulbs

39. Which of the following species has maximum number of unpaired electrons?

None of these

O₂-

O₂+

O₂

40. Which is the gas among the following that reacts with H₂ is darkness?

Br₂

F₂

Cl₂

I₂

41. Which one of the following substances is used in the laboratory for a fast drying of neutral gases?

Anhydrous calcium chloride

Na₃PO₄

Phosphorus pentoxidse

Active charcoal

42. The noble gases consist of

Triatomic molecules

Diatomic molecules

Atoms linked by weak bonds

Single free atoms

43. Which is not correct reason about the oxidizing power of halogens depending on various factors?

Energy dissociation

High atomic number

Electron affinity

Hydration energy

44. Which statement is correct about halogens?

They can mutually displace each other from the solution of their compounds with metals

They are all diatomic and form univalent ions

They are all capable of exhibiting several oxidation states

They are all diatomic and form divalent ions

45. Plaster of Paris is used

As a drying agent

In metallurgical process

In dentistry and surgery

As a plaster for walls

46. Bond angle is minimum for

H₂O

H₂Te

H₂Se

H₂S

47. In Solvay ammonia process, sodium bicarbonate is precipitated due to

Reaction with CO₂

Reaction with brine solution

Presence of NH₃

Reaction with NaOH

48. SO3 is not dissolve directly in H2O because

The reaction is highly exothermic

The reaction does not go to completion

SO₃ is insoluble in H₂O

The reaction is quite slow

49. Which statement is correct?

Noble gases will all burn in pure oxygen

Noble gases are all dense gases

Noble gases have low m.p and b.p.

None of these

50. Which of the following statements is incorrect?

Sodium is the not most abundant metal in earth’s crust

Ionic character of alkali metal halides decreases down the group

Sodium is the most abundant metallic element in sea water

Melting and boiling points of alkali metals decrease down the group

Page 3 of 14

51. Permonosulphuric acid is known as

None of these

Marshall’s acid

Carlo’s acid

Sulphuric acid

52. Mark the compound which does not exist

AsF₅

PF₅

NCl₅

SbCl₅

53. Presence of which of the following salt increases the rate of setting of plaster of Paris.

KCl

NaCl

BaSO₄

CuSO₄

54. In view of their low ionization energies, the alkali metals are

Weak oxidizing agents

Strong oxidizing agents

Weak reducing agents

Strong reducing agents

55. Neon glows in discharge tube as

Bluish

Radish

Yellowish

Greenish

56. Which reason best accounts for the use of helium in modern airships?

Less dense then air and not flammable

Expense, but a very uncreative gas

Lighter than air and cheap to produce

Expensive but easy to store in cylinder

57. Fluorine does not show positive oxidation states due to the absence of

None

s-orbitals

d-orbitals

p-orbitals

58. Sulphuric acid reacts with PCl₅ to give

Sulphur tetrachloride

Sulphur monochloride

Sulphuryl chloride

Thionyl chloride

59. The compounds of alkaline earth metals have the following magnetic nature

Diamagnetic

Paramagnetic

Ferromagnetic

Antiferromagnetic

60. Which gives green colour in fireworks?

Potassium

Barium

Sodium

Calcium

61. Bleaching powder reacts with a few drops of conc. HCl to give

Chlorine

Oxygen

Hypochlorous acid

Calcium oxide

62. Among the fluorides listed below the one which does not exist?

CF₄

XeF₄

SF₄

HeF₄

63. The name of CaSO₄. ½ H₂O is

Dolomite

Plaster of Paris

Epsom salt

Gypsum

64. Alkaline earth metals comes under

Representative elements

Halogens

Transition elements

Inner transition elements

65. Gradual addition of electronic shells in the noble gases causes a decrease in their

Atomic radius

Ionization energy

Boiling point

Density

66. Which element forms an ion with charge +3?

Al

Be

Si

C

67. Which of the following has the highest melting point?

NaF

NaBr

NaCl

Nal

68. Which one of the following reacts with hemoglobin to form carboxuhaemoglobin?

CO

O₂

CO₂

H₂O₂

69. Which of the following is acidic?

SO₃

HgO

N₂O

BeO

70. The increase of Van der Waal’s forces in halogens is in the order of

I₂ > Br₂ > Cl₂ > F₂

Cl₂ > Br₂ > I₂ > F₂

F₂ > Cl₂ > Br₂ > I₂

Br₂ > Cl₂ > F₂ > I₂

71. A 500 g toothpaste sample has 0.2 g fluoride concentration. What is the concentration of F¯ ions in terms of ppm level?

250

1000

400

200

72. Oxygen shows oxidation states

-2

+2, -2

-2, +2, +6

+2, +4, +6

73. Molten sodium chloride conducts electricity due to the presence of

Free ions

Free molecules

Atoms of sodium and chlorine

Free electrons

74. Sodium chloride when heated with conc. H₂SO₄ and solid potassium dichromate gives

None

Chromyl chloride

Chromic chloride

Chromous chloride

75. The metal used in the thermite process because of its activity is

Zinc

Iron

Copper

Aluminum

Page 4 of 14

76. HNO₂ acts as an/a

Reducing agent

Acid

Oxidizing agent

All the three

77. Which of the following alkaline earth metals is the strongest reducing agent?

Sr

Ca

Ba

Mg

78. 6NaOH + Cl₂ → 5Nacl + Naclo₃ in this reaction chlorine is

Both oxidized and reduced

Reduced

Oxidized

No change

79. Fluorides of Ca, Mg, Ba and Sr are

Variable trend

Insoluble in water

Highly soluble in water

Less soluble in water

80. The percentage of lead in lead pencil is

80

70

Zero

20

81. Air is not a commercial source of which noble gas

Ar

Ne

Xe

He

82. In the electrolytic extraction of aluminum fused cryolite is added

To protect the anodes

To increase Al production

To act as reducing agent

To make a conducting solution of bauxite

83. In curing cement plasters, water is sprinkled from time to time. This helps is

Keeping it cool

Converting sand into silici acid

Developing interlocking needle like crystals of hydrated silicates

Hydrating sand and gravel mixed with cement

84. Which of the following fluorides of xenon is impossible?

XeF₂

XeF₃

XeF₆

XeF₄

85. The shape of gaseous SnCl₂ is

Angular

Tetrahedral

Linear

t-shaped

86. Aluminum is most abundant in earth’s crust, yet it is obtained from bauxite because

Bauxite contains maximum of Al

Bauxite is available in large quantity

Bauxite is less impure

Of easy extraction of Al from it

87. Which halogen has application in medicines mostly?

Br2

Cl₂

None

I₂

88. To a clear solution of compound (X) a solution of BaCl₂ is added and a heavy white precipitate is formed which does not dissolve in dilute HCl. The compound X is

A carbonate

A nitrate

A bromide

A sulphate

89. Hypo is used in photography for

The fixation of picture

Picture printed

Developing picture

The colour of picture

90. Which one has least dissociation energy?

HF

HCL

HI

HBr

91. Phosphide ion has the electronic structure similar to that of

Fluoride ion

Nitride ion

Chloride ion

Sodium ion

92. What is the atomic number (Z) of the noble gas that reacts with fluorine?

18

54

10

2

93. A clathrate may be defined as a

Cage compound

Liquid crystal

Solid solution

Mixture

94. Which statement is true about IV A group

Marked change of properties

Whole group consist of non-metals

Abrupt change of properties

There is a regular gradation of properties from top to bottom

95. The most abundant inert gas in the atmosphere is

Ne

He

Ar

Kr

96. The bleaching action of chlorine is due to

Chlorination

Reduction

Oxidation

Hydrogenation

97. Strongest reducing agent is

HCl

Hl

HBr

HF

98. The solubility of carbonates decrease down the Mg group due to decrease in

Inter – ionic attraction

Entropy of solution formation

Lattice energy solids

Hydration energies of cations

99. An aqueous solution of sodium carbonate is alkaline because sodium carbonate is a salt of

Weak acid and weak base

Strong acid and strong base

Strong acid and weak base

Weak acid and strong base

100. The element that does not form a monoxide is

Tin

Silicon

Germanium

Lead

Page 5 of 14

101. Which one of these is most reactive?

Pb

K

Mg

Na

102. The halogen having highest electron affinity is

Iodine

Chlorine

Fluorine

Bromine

103. Bromine is obtained on a commercial scale from

Cryolite

Carnallite

Caliche

Common salt

104. Sometimes a yellow turbidity appears while passing H₂S gas even in the absence of II group radicals. This is because

Of the oxidation of H₂S gas by some acid radicals

Sulphur is present in the mixture as impurity

III group radicals are precipitated as hydroxides

IV group radicals are precipitated as sulphides

105. Which of the following does not exhibit the periodicity in properties of the elements?

Electro negativity

Ionization energy

Atomic radius

N/P ratio

106. The noble gases are

Diatomic

Monoatomic

All of these

Polyatomic

107. Electron affinity of sulphur is

Equal to O and Se

Less than O but more than SE

More than O and Se

More than O but less than Se

108. Which of the following halogens dose not form oxy acid?

Chlorine

Bromine

Fluorine

Iodine

109. Mark the nitrate which decomposes differently on heating

RbNO₃

LiNO₃

NaNO₃

KNO₃

110. Which shows maximum catenation property?

O

Se

S

Te

111. Which of the following is the lifesaving mixture for an asthma patient?

Mixture of argon and oxygen

Mixture of neon and oxygen

Mixture of helium and oxygen

Mixture of xenon and nitrogen

112. Mark the smallest atom

Br

Cl

I

F

113. When sulphur is boiled with Na₂SO₃ solution, the compound formed is

Sodium thiosulphate

Sodium sulphides

Sodiums sulphates

Sodium persulphate

114. Reactivity of borazole is greter than that of benzene because

Borazole is polar compound

Borazole is nonpolar compound

Borazole is electron deficient compound

Of localized electrons in it

115. Among noble gases (from He to Xe) only xenon reacts with fluorine to form stable xenon fluorides because xenon

Has the highest heat of vaporization

Has the largest size

Has the lowest ionization enthalpy

In the most readily available gas

116. Carbonates of li are less stable than that of Na due to

Lower electro positivity

Low charge density

Low electronegativity

None

117. On heating sodium metal in a current of dry ammonia, the compound formed is

Sodium amide

Sodium azide

Sodium hydride

Sodium nitride

118. Which of the following halogens does not form its oxy acids?

Iodine

Bromine

Chlorine

Fluorine

119. In certain respects, lithium differs from other alkali metals. The main reason for this is

Greater hardness of Li

Hydration of Li⁺ ion

Extremely high electropositivity of Li

Small size of lithium atom and Li⁺ ion

120. The correct formula of Plaster of Paris is

CaSO₄. 1/2H₂O

CaSO₄.2H₂O

CaSO₄

CaSO₄. 3H₂O

121. Sea weeds are important source of

Iodine

Bromine

Iron

Chlorine

122. Cassiterite is an ore of

Mn

Ni

Sn

Sb

123. Among noble gases xenon gives compounds due to

Large size

Zero electron affinity

Higher I-P

Structure

124. As a fixing agent in photography, sodium thiosulphate is used for

Preventing overdeveloping and fogging

Converting silver halides to metallic silver

Dissolving out unreacted silver bromide

Reducing solubility of AgBr

125. Aluminum (III) chloride forms a dimer because

Al belongs to third group

It cannot form a trimer

Al has high ionization energy

Higher co-ordination can be achieved by Al

Page 6 of 14

126. When one mole of bleaching powder is completely decomposed, then the mass of chlorine gas that is liberated will be

35.45 g

17.72 g

88.60 g

70.90 g

127. The process associated with sodium carbonate manufacture is known as

Chamber

Castner

Solvay

Haber

128. The solubilities of carbonates decrease down the magnesium group due to a decrease in

Entropy of solution formation

Hydration energies of cations

Inter ionic attraction

Lattice energies if solids

129. Which member of the halogen family (X₂) does not show positive oxidation sate (X⁺₂)?

Fluorine

Bromine

Chlorine

Iodine

130. Which oxide of nitrogen is obtained on heating ammonium nitrate at 250°C?

Nitric oxide

Nitrogen dioxide

Dinitrogen tetraoxide

Nitrous oxide

131. Eka-aluminum and Eka-silicon are known as

Iron and sulphur

Aluminum and silicon

Proton and silicon

Gallium and Germanium

132. Which of the halogen can displace other three elements?

Chlorine

Iodine

Fluorine

Bromine

133. The noble gas forming the maximum number of compounds

He

Xe

Ne

Ar

134. The metal extracted by electrolysis of its fused salt is

Lead

Copper

Sodium

Iron

135. Which one of the elements reacts directly with nitrogen to form nitride?

Rb

Li

K

Ba

136. Which of the following sets of atomic numbers belong to that of the alkali metals?

37, 19, 3, 55

1, 12, 30, 4, 62

12, 20, 56, 88

9, 17, 35, 53

137. Point out the correct equation which represents the strong action of heat on calcium nitrate.

B

C

D

A

138. Mark the correct statement

Carbonates of Na, K, NH₄ are soluble in water

Basic carbonates of Mg and Cu are soluble in water

Carbonates of Ca, Ba, Sr are soluble in water

Li₂CO₃ is soluble in water

139. Electropositive character increase down the group due to

All of these

Decrease in electronegativity of the elements

Increase in atomic size of elements

Decrease in I.P

140. The atoms with high values of first ionization potential values always have

Large atomic size

Metallic properties

Small ionic size

Strongly bond valence electrons

141. In which of the following groups, when he is placed, its all properties are satisfied?

With inert gases

With halogens

None of these

With alkali metals

142. The most stable +2 oxidation state is exhibited by

Fe

Pb

Si

S

143. Fluorine is a stronger oxidizing agent than chlorine in aqueous solution. This is attributed to many factors except.

Heat of dissociation

Electron affinity

Heat of hydration

Ionization potential

144. Which of the following compounds of cement sets at the slowest rate?

Diclacium silicate

Tetra calcium aluminoferrite

Tri-calcium aluminate

Tri-calcium silicate

145. All the elements of oxygen family are

Polymorphic

Metalloids

Radioactive

Non-metals

146. Which of the following is true for magnesium?

It resembles, in chemical properties, with its diagonally placed element Boron in III group of the Periodic Table

It is more electropositive than sodium

It is a strong reducing agent

It is manufactured by electrolysis of aqueous magnesium chloride

147. Which of the following phosphorus is most reactive?

White phosphorus

Red phosphorus

Scarlet phosphorus

Violet phosphorus

148. Keeping in view the uses of Al, mark the incorrect statement. Al is used

As an oxidizer in metallurgy

As an abrasive in the form of abundum

In form of foil for wrapping

For preparing artificial

149. Which of the following is correct?

Magnesium reacts with cold water and liberates hydrogen

Sodium reduces CO₂ to carbon

Magnallium is one alloy of Mg and zinc

In the Castner process of sodium extraction, NaCl is used as an electrolyte

150. Which of the following is most electronegative?

C

Pb

Sn

Si

Page 7 of 14

151. Which one is hygroscopic in nature?

HNO3

HBr

HCL

HUO4

152. When NaOH is made, the gas released at the cathode is

Cl₂

H₂

H₂O

O₂

153. Which of the following is an inert gas?

N₂

Argon

O₂

H₂

154. The oxyacids of phosphorus in which phosphorus has the lowest oxidization state is

Hypo phosphorous acid

Metaphosphoric acid

Pyro phosphoric acid

Orthophosphoric acid

155. The ionization potential is lowest for the

Alkaline earth metals

Alkali metals

Inert gases

Halogens

156. The electronic configuration of metal M is 1s², 2s², 2p⁶, 3s¹. The formula of its oxide would be

M₂O

M₂O₃

MO₂

MO

157. Aqueous NaCl solution is electrolyzed using platinum electrodes. What is the product formed at cathode?

Na

Cl₂

H₂

O₂

158. Which one is the biggest ion?

Na⁺

Ba²⁺

Al³⁺

Mg²⁺

159. The first ionization energies of alkaline earth metals are higher than those of the alkali metals. This is because

There is no change in the nuclear charge

There is increase in the nuclear charge of the alkaline earth metals

There is decrease in the nuclear charge of the alkaline earth metals

None of these

160. Which one of the following properties of alkali metals increases in magnitude as the atomic number rises?

Melting point

Electro negativity

First ionization energy

Ionic radius

161. Which of the following will liberate hydrogen by its reaction with hydrochloric acid?

Magnesium

Copper

Phosphorus

Mercury

162. The correct order of electron affinity of B, C, N, O is

O > B > C > N

O > C > N > B

O > C > B > N

B > N > C > O

163. Which is the most volatile compound?

HI

HBr

HCl

HF

164. The atomic numbers of four elements are given below. Which one is an alkaline earth metal?

30

40

10

20

165. The type of hybridization of born in diborane is

Sp-hybridisation

Sp³d²-hybridisation

Sp²-hybridisation

Sp³- hybridization

166. Gradual addition of electronic shells in the noble gases causes a decrease in their

Boiling point

Density

Ionization energy

Atomic radius

167. Choose the non metallic element whose molecules contain maximum number of its atoms

Si

O

P

As

168. Which of the following oxides is peroxide?

Na₂O₂

SO₂

Mn₂O

BaO

169. Freon-12 is used as a

Fungicide

Refrigerant

Herbicide

Insecticide

170. Which of the following is an electron management of a noble gas?

2,8,18,2

2,8,7

2,8

2,8,2

171. Which of the following has highest first ionization potential?

Nitrogen

Boron

Oxygen

Carbon

172. Among HCL, HBr and Hl, Hi shows highest B.P due to

Dipole-dipole forces

H. bonding

Strongest vanderwaal’s force

None of these

173. Which of the following on heating at 125°C gives plaster of Paris?

Borax

Calomel

Alum

Gypsum

174. Point out the property which is not characteristic of alkali metals

Low electronegativity

Low melting point

Their ions are isoelectronic with noble gases

High ionization energy

175. When K₂O is added to water, the solution is basic because it contains a significant concentration of

O³¯

OH¯

O₂¯²

K⁺

Page 8 of 14

176. Mark the correct statement

Cl₂ is more insoluble in water

Iodine is a solid

Br is more reactive than Cl₂

None of these

177. In the fractional distillation of liquid air, the gas that boils off last is

O₂

H₂

Ar

He

178. Which of the following halogen does not exhibit positive oxidation state in its compounds?

I

Br

Cl

F

179. Electrolysis of fused anhydrous KCl.MgCl₂.6H₂O gives

Magnesium only

Potassium and magnesium

Magnesium and chlorine

Potassium only

180. The noble gas He was discovered by

Rutherford

Chadwick

Dorn

Frank land and Lockyer

181. Crystalline form of sulphur stale at room temperature is

Prismatic sulphur

Plastic sulphur

Monoclinic sulphur

Rhombic sulphur

182. Which one has highest electron affinity?

F

Br

Cl

I

183. The metal with highest electrical resistance at room temperature is

Te

Pb

Po

Fe

184. The last orbit of argon would have electrons

2

6

18

8

185. Calcium is obtained by

Electrolysis of molten anhydrous or fused calcium chloride

Roasting lime stone

Reduction of calcium chloride with carbon

Electrolysis of solution of calcium chloride in water

186. Limestone is not used in which of the following manufacturing processes?

Iron from haematite

Phosphorus from phosphorite

Ordinary (soda lime) glass

Solvay process of sodium carbonate

187. Sea divers go deep in the sea water with a mixture of which of the following gases?

CO₂ and Ar

O₂ and He

O₂ and Ar

O₂ and CO₂

188. Mark the incorrect statement about ‘Li’

‘Li’ combine with nitrogen directly to form Lithium nitride

‘Li’ is not effected by air

‘Li’ has a great tendency to form hydrates

When burn in oxygen, ‘Li’ forms super oxide LiO₂

189. NaOH is prepared by the method

Solvay process

Castner Kellner cell

Castner cell

Down’s cell

190. Which of the following noble gases does not have an octet of electrons in its outermost shell?

Radon

Argon

Neon

Helium

191. What causes nitrogen to be chemically inert?

Short internuclear distance

High bond energy

Absence of bond polarity

Multiple bond formation in the molecule

192. Who reported first noble gas?

Frank land

Cavendish

Ramsay

J.J Thomson

193. The metal that dissolves in liquid ammonia, giving a dark blue coloured solution is

Lead

Zinc

Sodium

Silver

194. The most acidic of the following compounds is

B₂O₃

P₂O₃

As₂O₃

Sb₂O₃

195. Hydrochloric acid at 25°C is

Ionic and gas

Ionic and liquid

Covalent and liquid

None of these

196. The most powerful oxidizing agent among the halogens is

I₂

F₂

Cl₂

Br₂

197. Which one of the halogen acid is a liquid?

HCl

HF

HBr

Hl

198. Orthophosphoric acid is

Monobasic

Tetrabasic

Dibasic

Tribasic

199. Identify the incorrect statement with respect to ozone.

Ozone is more reactive than dioxygen

Ozone is formed in the upper atmosphere by a photochemical reaction involving dioxygen

Ozone is diamagnetic whereas dioxygen is paramagnetic

Ozone protects the earth’s inhabitants by absorbing gamma-radiations

200. The last member of the family of inert gases is

Radon

Neon

Argon

Xenon

Page 9 of 14

201. Choose the correct statement about heat of vapourization of noble gases

None of these

Noble gases have o heat of vapourization

It increases gradually down the group

It decreases gradually down the group

202. Which one of the following is a correct set for SiO₂?

Linear, basic

Tetrahedral, acidic

Linear acidic

Angular, disc

203. The strongest reducing agent out of Na, K, Rb And Cs is

Na

Cs

K

Rb

204. Which of the noble gas has highest polarizabilities?

He

Ar

Kr

Xe

205. LiF is insoluble in water, while NaF and KF are soluble. This is due to

Small ionic size of Li⁺

High ∆H lattice

Low ∆H lattice

High covalent nature

206. The variety of glass used in making lenses and prisms of

Flint glass

Borosilicate glass

Crooke’s glass

Soda glass

207. Compared with the alkaline earth metals, the alkali metals exhibit

Greater hardness

Smaller ionic radii

Highest boiling points

Lower ionization energies

208. Solution of sodium metal in liquid ammonia in strongly reducing due to the presence in the solution of the following

Sodium atoms

Solvated electrons

Sodium amide

Sodium hydride

209. Indicate the correct statement

Alkali metal atom has the smallest size in its period

Na cl on electrolyzing give sodium the anode and cl at cathode

Alkali metals have ns’ configuring in outermost shells

Alkali metals do not reacts with metals

210. Which is true for an element R present in group 13 of the periodic table?

It has oxidation state of +4

It is a gas at room temperature

It forms RX₂

It forms R₂O₃

211. Alkali metals displace hydrogen from water forming bases due to the reason that

They are far above the hydrogen in electrochemical series based on oxidation potential

They are far below the hydrogen in electrochemical series based on oxidation potential

They contain only one electron in their outermost shell

Their ionization potential is less than that of other elements

212. Elements of which of the following groups will from anions most readily?

Nitrogen family

Alkali metals

Halogens

Oxygen family

213. Which of the following hydrogen halide is the weakest acid in solution?

HI

HBr

HCl

HF

214. I₂ is solid at room temperature because

It is highly electronegative

It possess hydrogen bonding

Its molecule has a large size

It has metallic bond

215. Which is the symbol of element whose atoms have the outermost configuration 2S²2P³ is

P

C

Li

N

216. Chlorine acts as a bleaching agent only in the presence of

Sun light

None of these

Moisture

Dry air

217. Beryllium is placed above magnesium in the second group. Beryllium dust, therefore, when added to MgCl₂ solution will

Precipitate Mg metal

Have no effect

Leads to the dissolution of beryllium metal

Precipitate Mg

218. When ammonia is heated with cupric oxide, a molecule of ammonia will

Gain 3 electrons

Gain 2 electrons

Lose 3 electrons

Lose 2 electrons

219. The correct sequence of elements in the decreasing order of first ionization energy is

Mg > Na > Al > Si

Si > Mg > Al > Na

Na > Mg > Al > Si

Al > Mg > Na > Si

220. Select the gas which is used in electrical discharge lights

Nitrogen

Neon

Helium

Oxygen

221. Dilute hydrochloric acid solution cannot be concentrated by boiling beyond

33%

11%

44%

22%

222. Epsom salt is the hydrate of one of the following

Magnesium ammonium phosphate

Calcium sulphates

Magnesium sulphates

Ferrous ammonium sulphate

223. Which is the strongest acid

HNO3

Cannot be predicted

HCLO4

HCL

224. P₂O₅ is heated with water to give

Hypo phosphorous acid

Phosphorous acid

Orthophosphoric acid

Hypo phosphoric acid

225. Which one of the following allotropic forms of carbon is isomorphous with crystalline silicon?

Graphite

Coke

Diamond

Coal

Page 10 of 14

226. The number of elements in the 4th period of periodic table is

32

10

8

18

227. The colour of I₂ in CCI₄ is

Violet

Colourless

Radish brown

Bluish green

228. Which of the following is most electronegative?

Silicon

Lead

Carbon

Tin

229. An atom with atomic number 20 is most likely to combine chemically with the atom whose atomic number is

10

11

14

16

230. The acid which has a peroxy linkage is

Pyrosulphuric acid

Sulphurous acid

Carlo’s acid

Dithionic acid

231. Sulphuric acid has great affinity for water because

Acid forms hydrates with water

It decomposes the acid

Acid decomposes water

It hydrolyses the acid

232. Common oxidation state of boron are

+3,-3

+3

+1

-3

233. According to the Periodic Law of elements, the variation in properties of elements is related to their

Nuclear masses

Nuclear neutron-proton number rations

Atomic numbers

Atomic masses

234. Fluorine is a better oxidizing agent than Br₂. It is due to

Non-metallic nature of fluorine

More electron repulsion in fluorine

More electro negativity of fluorine

Small size of fluorine

235. Which of the following is most volatile?

HCl

HBr

HF

HI

236. Which one halogen is radioactive?

Bromine

Astatine

Iodine

Chlorine

237. Several blocks of magnesium are fixed to the bottom of a ship to

Mark the ship lighter

Prevent puncturing by under sea rock

To prevent the action of water and salt

Keep away the sharks

238. On heating quick lime with coke in an electric furnace, we get

CaC₂

Ca and CO₂

CaCO₃

CaO

239. In the modern long form of the periodic table, elements are arranged in the increasing order of

Atomic mass

Atomic number

Isotopic number

Mass number

240. Calico printing means

Leather printing

Cloth printing

Paper printing

Glass printing

241. Which halogen acid is a liquid no room temperature?

HBr

HF

HU

HI

242. What is more true about alkali metals?

Oxidizing agents

Reducing agents

Both oxidizing and reducing agents

Hydrolyzing agents

243. Which of the following isoelectronic ions has the lowest ionization energy?

Ca²⁺

Cl¯

K⁺

S²¯

244. Keeping in view the uses of sodium silicate, select the incorrect statement:

It is as filter for soap

It is used furniture polish

It is used as fire proof in textile

It is used in the formation white cement

245. XeF₄ on partial hydrolysis produces

XeOF₄

XeF₂

XeO₃

XeOF₂

246. In the Hoop’s process for refining of Al the fused materials form three different layers and they remain separated during electrolysis also. This is because

Three layers have different densities

Three layers are maintained at different temperatures

There is special arrangement is cell to keep the layers separate

The upper layer is kept attracted by cathode and lower layer is kept attracted by anode

247. Lithium is strongest reducing agent among alkali metals due to which of the following factor?

Ionization energy

Lattice energy

Electron affinity

Hydration energy

248. The number of electrons that are paired in oxygen molecule are

16

14

12

7

249. Which is the strongest acid?

HClO₄

HClO₃

HClO₂

HClO

250. The one which does not show variable valency is

Barium

Copper

Titanium

Lead

Page 11 of 14

251. The oxidizing power of halogens depends upon various factors. Which are not the correct reasons?

Hydration energy of ion

Energy dissociation

Electron affinity

High atomic number

252. O²¯ has high ionic radius because the ionic radius of anion is greater than individual element. Which of the following oxides is amophteric in character?

SnO₂

CO₂

CaO

SiO₂

253. Which of the halogen has highest electronegativity?

Iodine

Chlorine

Fluorine

Bromine

254. The correct order of electron affinity among the following is

Br > Cl > F

F > Br > Cl

F > Cl > Br

Cl > F > Br

255. The density of nitrogen gas prepared from air is slightly greater than that of nitrogen prepared by a chemical reaction form a compound of nitrogen due to the presence of the following in aerial nitrogen.

Greater amount of nitrogen molecules derived from N¹⁵ isotope

Argon

CO₂

Some nitrogen molecules analogous to O₂

256. Helium-oxygen mixture is used by deep sea divers in preference to nitrogen-oxygen mixture because

Helium is much less soluble in blood than nitrogen

Nitrogen is much less soluble in blood than helium

Under the sea nitrogen and oxygen react to give poisonous nitric oxide

Nitrogen is highly soluble in water

257. Mark the incorrect statement about the conductance semi-conductors in photoelectric cells and solar batteries. Semi conductors show

Decease in resistance with intensity of light

Decrease in resistance with increase in temperature

Different resistance under different circumstance

Increase in resistance with increase in temperature

258. What is the order of power of halogen as an oxidizing agent?

U₂>Br₂>I₂>F₂

I₂>Br₂>U₂>F₂

I₂>F₂>Br₂>U₂

F₂>Cl₂>Br₂>I2

259. The alkali metals

Form salts which are predominantly covalent

Show decreased chemical reactivity with dry oxygen in going form Li to Cs

Show increasing electro negativity from Li to Cs.

Form salt like hydrides

260. Which molecule has a coordinate covalent bond in its structure?

NH₃

CO₂

CO

Al₂O₃

261. Which element has strongest attraction for its valence electrons?

F

Cl

Br

I

262. The properties of lithium are similar to those of Mg this is because

Both have similar electronic configurations

The ratio of their charge to size is nearly the same

Both have nearly the same size

Both are found together in nature

263. Bromine can be liberated from KBr solution by the action of

Chlorine

Iodine solution

Ki

NaCl

264. The difference of water molecules in gypsum and plaster of Paris is

5/2

½

2

1½

265. Inert pair effect plays an important role in case of

Si

Al

F

Tl

266. Heavy water is obtained by

Prolonged electrolysis of water

Simple distillation of water

Dissolving heavy salt in water

Removing impurities of calcium and magnesium form water

267. Which of the following substance is used for drying gases?

Sodium bicarbonate

Sodium carbonate

Calcium carbonate

Calcium oxide

268. Halogens exist in the form of

Diatomic molecules

Monoatomic molecules

Cannot be predicted

Various forms

269. Which one halogen can show only-1 oxidation state?

I

Cl

Br

F

270. Nitrolim is

CaC₂ + C

CaCN₂ + C

Ca(CN)₂ + C

All

271. An atom with high electro negativity has

High ionization potential

Large size

Low electron affinity

Low ionization potential

272. In the periodic table, the element with atomic number 16 will be placed in the group

Fourth

Sixth

Fifth

Third

273. Which of the following compounds is explosive in nature?

Phosphorus trichloride

Nitrosyl chloride

Nitrogen trichloride

Hyponitrous acid

274. Boron compounds behave as Lewis acid because of their

Covalent nature

Acidic nature

Ionization property

Electron deficiency

275. XeF₄ involves which hybridization

Sp³d²

Sp²

Sp²d

Sp

Page 12 of 14

276. When a colourless gas is passed through bromine water only decolourisation takes place the gas is

HBR

SO₂

HCl

H₂S

277. The halogen that is most easily reduced is

Br₂

Cl₂

I₂

F₂

278. Which noble gas is used in labors?

Krypton

Argon

Neon

Helium

279. B, Al, Ga, In and Tl belong IV group of the period table show a decrease with increasing relative atomic mass:

The stability of +2 oxidation state

Ionic character of the compound

The first ionization energy

The basic character of the oxides

280. The halogens exist as halides. Which is not common place whose they are found?

In the atmosphere

As salts in ponds

In lakes

In sea

281. Which one is the weakest oxyacid of chlorine?

HCIO₂

HCIO₄

HCIO

HCIO₃

282. Which of the following noble gas is not present in atmosphere?

He

Rn

Ne

Ar

283. Which one of the following properties is not correct for ozone?

It oxidizes lead sulphides

It oxidizes potassium iodide

It cannot act as a bleaching agent

It oxidizes mercury

284. Fluorine differs from other halogens due to its small size and restriction of its valence shell to an octet. Mark the correct behavior of fluorine

It is more reactive than other halogens

It has highest first ionization energy

It has highest electronegativity

It restricts to oxidation state – 1 only

285. A metal is burnt in air and the ash on moistening smells of ammonia. The metal is

Al

Na

Mg

Fe

286. Which of the following statements is incorrect about halogens?

All the halogens have electronic configuration ns2P5

They have high electron affinity and ionization energy

All the halogens react with noble gases to form their halides

All are non-metals

287. Deliquescence is a process in which a solid

Loses water of crystallization

Absorbs moisture and turn into liquid

Increases the water of crystallization

Absorbs moisture and remain solid

288. Choose a set which has both member from the same periods of periodic table

Na, Cl

Na, Ca

Cl, Br

Ca, Cl

289. Which of the following metal is present in chlorophyll?

Iron

Cobalt

Chromium

Magnesium

290. Which noble gas is used earth quake prediction?

Ar

Kr

He

Rn

291. The halogen which reacts spontaneously with Au(s) to produce Au³⁺ is:

Br₂

I₂

F₂

Cl₂

292. Which of the following belongs to the halogen family?

Radium

Astatine

Francium

Polonium

293. Mg is an important component of which biomolecule occurring extensively in living world?

Haemoglobin

ATP

Chlorophyll

Florigen

294. Bleaching powder loses its power on keeping for a long time because

It absorbs moisture

It changes into CaCl₂ and Ca(OH)₂

It changes into calcium chloride and calcium chlorate

It change into calcium hypochlorate

295. Which one of the following has highest electropositive character?

Cr

Cs

Ba

Cu

296. One which is not dissolved by dilute hydrochloric acid is

BaCO₃

ZnS

BaSO₄

MnS

297. The metal used for making radiation shield is

Fe

Pb

Al

Zn

298. Which one of the following reactions is not associated with the Solvay process of manufacture of sodium carbonate?

NaCl + NH₄HCO₃ → NaHCO₃ + NH₄Cl

CO₃ + H₂O → H₂CO₃

NH₃ + H₂CO₃ → NH₄HCO₃

2NaOH + CO₂ → Na₂CO₃ + H₂O

299. Which of the following species has the highest ionization potential?

Li⁺

Al⁺

Mg⁺

Ne

300. Which of the following is not isoelectronic?

Mg²⁺

Cl¯

O²¯

Na⁺

Page 13 of 14

301. Which of the following statement about fluorine is not correct?

Bond energy of fluorine is less than that of chlorine

Electron affinity of chlorine is greater than that of fluorine

Fluorine does not form oxoacid

Fluorine cannot be prepared by electrolysis of fused metal fluorides

302. All halogen are

Oxidizing as well as reducing agents

Reducing agents

Oxidizing agents

Drying agents

303. The atomic radius increases as we move down a group because

Additive electrons are accommodated in new electron level

Atomic number increases

Atomic mass increases

Effective nuclear charge increases

304. Which of the following element has the maximum electron affinity?

S

Cl

F

I

305. Match List I with List II and select the answer using the codes given below:

Code	List I	Code	List II
a	XeF₄	1	Distorted octahedral
b	XeF₆	2	Tetrahedral
c	XeO₃	3	Square planar
d	XeO₄	4	Trigonal pyramidal

a-1, b-4, c-2, d-3

a-3, b-1, c-4, d-2

a-2, b-3, c-1, d-4

a-4, b-1, c-3, d-2

306. Which halogen have most corrosive action on skin?

Chlorine

I₂

F₂

Br₂

307. If one liter of air is passed repeatedly over heated copper and magnesium till no further reduction in volume takes place, the volume finally obtained would be approximately

800 mL

10mL

Zero

200mL

308. Which of the following has greatest reducing power?

HBr

HI

HCl

309. How does the ionization energy of 1st group elements vary?

Decreases down the group

Remains unchanged

Variation is not regular

Increases down the group

310. Identify the correct statement

Gypsum is obtained by heating plaster of pairs

Plaster of Pairs can be obtained by partial oxidation of gypsum

Plaster of Paris is obtained by partial oxidation of gypsum

Gypsum contains a lower percentage of calcium than plaster of pairs

311. Action of caustic soda on aluminum hydroxide gives a compound having formula

Na₃AlO₃

NaAlO₂

Na₂Al(OH)₄

Al₂(OH)₄

312. Which one of the following elements belongs to halogen family?

Astatine

Radium

Francium

Polonium

313. Pyrex glass is a mixture of

Sodium silicate and lead silicate

Sodium silicate and aluminum borosilicate

Sodium borosilicate and aluminum borosilicate

Sodium silicate and calcium silicate

314. The elements with atomic numbers 9, 17, 35, 53, 85 and all

Noble gases

Light metals

Halogens

Heavy metals

315. Vander Waals forces are stronger in

F₂

Cl₂

Br₂

I₂

316. Which of the following ion has the highest value of ionic radius?

B³⁺

O²¯

Li⁺

F¯

317. For two ionic solids CaO and Kl, identify the wrong statement among the following?

Kl is soluble in benzene

CaO has high m.p.

Lattice energy of CaO is much higher than that of Kl

Kl has high m.p.

318. The structure of XeF₆

Pyramidal

None of these

Distorted octahedral

Tetrahedral

319. Among the alkaline earth metals the element forming predominantly covalent compound is

Calcium

Barium

Beryllium

Strontium

320. The oxide of which of the following elements will be acidic in character

Mg

Rb

Li

Cl

321. Mark the element which shows only one oxidation state is its compounds

Cl

F

Br

I

322. A Major constituent of Portland cement (except lime) is

Iron oxide

Alumina

Magnesia

Silica

323. In which form boron exist mostly in nature

Oxides

Oxyborates

Nitrides

Sulphides

324. The following has zero valency

Na

Al

Be

Kr

325. Variable valency is characteristic of

Noble gas

Transition elements

Alkali metals

Halogen

Page 14 of 14

326. In the manufacture of bromine form sea water, the mother liquor containing bromides is treated with

Carbon dioxide

Iodide

Sulphur dioxide

Chlorine

327. Electron affinity depends on

Nuclear charge

Atomic number

Atomic size

Atomic size and nuclear charge both

328. Which is valence shell configuration of halogens?

NS₂, nP₄

nS₂, nP₃

ns₂, nP₅

nS₂, nP₆

329. The element which has a simple cubic lattice in solid state is

Te

Po

Se

None of these

330. Which of the following is a man made element?

Ra

Lr

Rn

Fr

Total Questions:	330
Time Allowed:	80 Minutes
Total Marks:	330
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	MDCAT Entry Test Chemistry Online Test Interview Questions about Chemisttry All Universities Entrance Test Recruitments Tests

MDCAT Chemistry The Halogens and Noble Gases Online Test

Chemistry The Halogens and Noble Gases MCQS Online Test

MDCAT Chemistry The Halogens and Noble Gases Chapter Online Test

MDCAT Chemistry The Halogens and Noble Gases Test

Chemistry

You Might Also Like

Malik Tahir

2 Comments

Leave a Reply Cancel reply

Chemistry The Halogens and Noble Gases MCQS Online Test

MDCAT Chemistry The Halogens and Noble Gases Chapter Online Test

MDCAT Chemistry The Halogens and Noble Gases Test

Chemistry

You Might Also Like

Malik Tahir

Your Related

MDCAT Chemistry Solutions Online Test

Rawalpindi Medical College RMC 2025 Entry Test Preparation Online

MDCAT Biology Kingdom Prokaryotes Test Online Mcqs

KMU Peshawar Entry Test 2025 Registration Forms Dates Time Schedule

Sindh Medical College MDCAT Entry Test Schedule 2025 Application forms

MDCAT English Spotting Errors Online Test 3

2 Comments

Leave a Reply Cancel reply