MDCAT Chemistry The Halogens and Noble Gases Online Test

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Chemistry

1. Which halogen have most corrosive action on skin?

I₂

Chlorine

F₂

Br₂

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

Polonium

Francium

Radium

Astatine

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

Keep away the sharks

Prevent puncturing by under sea rock

Mark the ship lighter

To prevent the action of water and salt

4. Which of the following is most electronegative?

Pb

Si

Sn

C

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

Tetrahedral, acidic

Angular, disc

Linear, basic

Linear acidic

6. Which of the following has highest dipole moment?

SbH₃

PH₃

NH₃

AsH₃

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

Reaction with brine solution

Reaction with CO₂

Presence of NH₃

Reaction with NaOH

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

Lattice energy of CaO is much higher than that of Kl

CaO has high m.p.

Kl has high m.p.

Kl is soluble in benzene

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

Helium

Oxygen

Nitrogen

Neon

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

Nitrogen dioxide

Nitrous oxide

Dinitrogen tetraoxide

Nitric oxide

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

Sodium hydride

Sodium azide

Sodium nitride

Sodium amide

12. XeF₄ on partial hydrolysis produces

XeOF₄

XeO₃

XeF₂

XeOF₂

13. The one which does not show variable valency is

Lead

Copper

Barium

Titanium

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

Rn

Ar

Xe

Kr

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

Large atomic size

Small ionic size

Metallic properties

Strongly bond valence electrons

16. 6NaOH + Cl₂ → 5Nacl + Naclo₃ in this reaction chlorine is

Both oxidized and reduced

No change

Reduced

Oxidized

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

Covalent

Ionic

Coordinate

Metallic

18. Which of the following is true for magnesium?

It is more electropositive than sodium

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

It is manufactured by electrolysis of aqueous magnesium chloride

It is a strong reducing agent

19. Which one of them is monoatomic?

Nitrogen

Fluorine

Oxygen

Neon

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

Oxygen

Boron

Carbon

Nitrogen

21. The melting point in lowest for

Mg

Be

Sr

Ca

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

Fe

Te

Pb

Po

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

Castner

Chamber

Haber

Solvay

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

Gain 3 electrons

Lose 2 electrons

Gain 2 electrons

Lose 3 electrons

25. Common oxidation state of boron are

+3

+1

-3

+3,-3

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26. 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 E.N

It has highest first I.E

It is more reactive than other halogens

It restricts to oxidation state – 1 only

27. Permonosulphuric acid is known as

Marshall’s acid

Carlo’s acid

None of these

Sulphuric acid

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

Cl

I

Br

F

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

Sodium ion

Nitride ion

Chloride ion

Fluoride ion

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

Electro negativity

Ionization energy

Atomic radius

N/P ratio

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

Cl₂

H₂

H₂O

O₂

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

Li⁺

O²¯

F¯

B³⁺

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

BaSO₄

MnS

ZnS

BaCO₃

34. Which gives green colour in fireworks?

Barium

Potassium

Sodium

Calcium

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

Alum

Borax

Calomel

Gypsum

36. Who reported first noble gas?

J.J Thomson

Cavendish

Ramsay

Frank land

37. Electropositive character increase down the group due to

Decrease in electronegativity of the elements

Decrease in I.P

All of these

Increase in atomic size of elements

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

Chlorophyll

Haemoglobin

ATP

Florigen

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

Graphite

Diamond

Coal

Coke

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

CO

CO₂

H₂O₂

O₂

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

Si

Pb

Fe

S

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

Zn

He

N

Li

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

Less soluble in water

Insoluble in water

Highly soluble in water

Variable trend

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

Br₂

F₂

Cl₂

I₂

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

H. bonding

Strongest vanderwaal’s force

Dipole-dipole forces

None of these

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

High atomic number

Hydration energy of ion

Electron affinity

Energy dissociation

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

To protect the anodes

To act as reducing agent

To make a conducting solution of bauxite

To increase Al production

48. I₂ is solid at room temperature because

Its molecule has a large size

It is highly electronegative

It possess hydrogen bonding

It has metallic bond

49. The noble gases consist of

Diatomic molecules

Atoms linked by weak bonds

Single free atoms

Triatomic molecules

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

Nuclear masses

Atomic masses

Nuclear neutron-proton number rations

Atomic numbers

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

Converting sand into silici acid

Developing interlocking needle like crystals of hydrated silicates

Keeping it cool

Hydrating sand and gravel mixed with cement

52. Which of the following is not isoelectronic?

Mg²⁺

O²¯

Cl¯

Na⁺

53. Which is the most volatile compound?

HCl

HBr

HF

HI

54. AlCl₃ flumes in moist air because

It is highly hygroscopic

It is very volatile

HCl is formed in moist air

It is covalent

55. Which is the strongest acid?

HClO

HClO₄

HClO₂

HClO₃

56. Which noble gas is used earth quake prediction?

Rn

Ar

Kr

He

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

Ne

Li

F

B

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

Hypochlorous acid

Calcium oxide

Oxygen

Chlorine

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

54

2

18

10

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

P

N

C

Li

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

Pyro phosphoric acid

Orthophosphoric acid

Hypo phosphorous acid

Metaphosphoric acid

62. 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 nitrate

A sulphate

A carbonate

A bromide

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

It changes into CaCl₂ and Ca(OH)₂

It changes into calcium chloride and calcium chlorate

It change into calcium hypochlorate

It absorbs moisture

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

F > Br > Cl

Cl > F > Br

Br > Cl > F

F > Cl > Br

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

It is used in the formation white cement

It is as filter for soap

It is used furniture polish

It is used as fire proof in textile

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

Li

Ba

Rb

K

67. Hydrochloric acid at 25°C is

Ionic and liquid

Covalent and liquid

None of these

Ionic and gas

68. The ionization potential is lowest for the

Alkali metals

Alkaline earth metals

Inert gases

Halogens

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

With halogens

None of these

With alkali metals

With inert gases

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

The basic character of the oxides

The first ionization energy

The stability of +2 oxidation state

Ionic character of the compound

71. Which is valence shell configuration of halogens?

nS₂, nP₃

ns₂, nP₅

nS₂, nP₆

NS₂, nP₄

72. The halogen which has only one oxidation state is

Br

F

I

Cl

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

It oxidizes mercury

It oxidizes potassium iodide

It cannot act as a bleaching agent

It oxidizes lead sulphides

74. Bromine is obtained on a commercial scale from

Carnallite

Cryolite

Caliche

Common salt

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

Ba

Cu

Cr

Cs

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76. The last orbit of argon would have electrons

2

18

6

8

77. Crystalline form of sulphur stale at room temperature is

Prismatic sulphur

Rhombic sulphur

Monoclinic sulphur

Plastic sulphur

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

Both are found together in nature

The ratio of their charge to size is nearly the same

Both have similar electronic configurations

Both have nearly the same size

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

Electron affinity of chlorine is greater than that of fluorine

Fluorine does not form oxoacid

Bond energy of fluorine is less than that of chlorine

Fluorine cannot be prepared by electrolysis of fused metal fluorides

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

Mg

Rb

Li

Cl

81. Freon-12 is used as a

Herbicide

Fungicide

Refrigerant

Insecticide

82. Which one has highest electron affinity?

F

I

Br

Cl

83. Alkali metals are generally extracted by

Reduction methods

Electrolytic methods

Displacement methods

Double decomposition methods

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

Weak acid and strong base

Strong acid and strong base

Weak acid and weak base

Strong acid and weak base

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

16

14

7

12

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

Mixture of xenon and nitrogen

Mixture of helium and oxygen

Mixture of neon and oxygen

Mixture of argon and oxygen

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

Their ions are isoelectronic with noble gases

Low melting point

High ionization energy

Low electronegativity

88. An atom with high electro negativity has

Low ionization potential

Large size

High ionization potential

Low electron affinity

89. The metal used for making radiation shield is

Al

Fe

Pb

Zn

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

Ar is used in electric bulbs

Ne is obtained during radioactive disintegration

HE is used in producing very low temperatures

Half-life of Rn is only 3-8 days

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

Silica

Magnesia

Alumina

Iron oxide

92. HNO₂ acts as an/a

All the three

Oxidizing agent

Reducing agent

Acid

93. 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-3, b-1, c-4, d-2

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

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

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

94. The halogen that is most easily reduced is

F₂

Br₂

I₂

Cl₂

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

Ki

Iodine solution

Chlorine

NaCl

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

Additive electrons are accommodated in new electron level

Effective nuclear charge increases

Atomic number increases

Atomic mass increases

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

Si

P

As

O

98. The bleaching action of chlorine is due to

Hydrogenation

Oxidation

Chlorination

Reduction

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

Potassium and magnesium

Potassium only

Magnesium and chlorine

Magnesium only

100. Deliquescence is a process in which a solid

Increases the water of crystallization

Absorbs moisture and turn into liquid

Absorbs moisture and remain solid

Loses water of crystallization

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101. The substance not likely to contain CaCO₃ is

Sea shells

A marble states

Dolomite

Calcried gypsum

102. The acid which has a peroxy linkage is

Dithionic acid

Pyrosulphuric acid

Sulphurous acid

Carlo’s acid

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

14

11

10

16

104. SO3 is not dissolve directly in H2O because

The reaction does not go to completion

The reaction is quite slow

The reaction is highly exothermic

SO₃ is insoluble in H₂O

105. Which one halogen is radioactive?

Iodine

Chlorine

Bromine

Astatine

106. Bond angle is minimum for

H₂Se

H₂S

H₂Te

H₂O

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

200

400

250

1000

108. Hypo is used in photography for

The fixation of picture

Developing picture

Picture printed

The colour of picture

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

O₂¯²

K⁺

O³¯

OH¯

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

None

Lower electro positivity

Low charge density

Low electronegativity

111. XeF₄ involves which hybridization

Sp²d

Sp

Sp³d²

Sp²

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

None of these

It increases gradually down the group

Noble gases have o heat of vapourization

It decreases gradually down the group

113. Number of elements present in 5th period is

24

32

8

18

114. The name of CaSO₄. ½ H₂O is

Dolomite

Epsom salt

Gypsum

Plaster of Paris

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

Polonium

Francium

Radium

Astatine

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

For preparing artificial

In form of foil for wrapping

As an oxidizer in metallurgy

As an abrasive in the form of abundum

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

Mg > Na > Al > Si

Al > Mg > Na > Si

Si > Mg > Al > Na

Na > Mg > Al > Si

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

9, 17, 35, 53

12, 20, 56, 88

1, 12, 30, 4, 62

37, 19, 3, 55

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

None of these

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

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

There is no change in the nuclear charge

120. Which halogen has application in medicines mostly?

None

Cl₂

I₂

Br2

121. Which one boric acid is stable one?

None of these

HBO₃

H₃BO₃

H₂B₄O₇

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

Br

U

O

F

123. Neon glows in discharge tube as

Bluish

Radish

Greenish

Yellowish

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

CaCO₃

CaC₂

CaO

Ca and CO₂

125. Among noble gases xenon gives compounds due to

Large size

Zero electron affinity

Higher I-P

Structure

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

Nitrogen trichloride

Hyponitrous acid

Phosphorus trichloride

Nitrosyl chloride

127. Cl₂O₇ is best prepared by passing by

Chlorine gas over hot HgO

Chlorine and oxygen over hot silver chlorate

Perchloric acid (CHIO₄) over hot silver oxide

Hydrogen chloride over phosphorus pentoxide

128. Which noble gas is used in labors?

Krypton

Helium

Neon

Argon

129. Fluorine differs from other halogens due to

High dissociation energy

Low first ionization energy

Small size

All

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

Radon

Helium

Neon

Argon

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

Heat of hydration

Electron affinity

Heat of dissociation

Ionization potential

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

Bauxite contains maximum of Al

Bauxite is less impure

Bauxite is available in large quantity

Of easy extraction of Al from it

133. Identify the correct statement

Gypsum contains a lower percentage of calcium than plaster of pairs

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

134. Heavy water is obtained by

Removing impurities of calcium and magnesium form water

Simple distillation of water

Prolonged electrolysis of water

Dissolving heavy salt in water

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

It forms R₂O₃

It has oxidation state of +4

It is a gas at room temperature

It forms RX₂

136. Which of the noble gas has highest polarizabilities?

Ar

Kr

He

Xe

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

Sodium persulphate

Sodium thiosulphate

Sodium sulphides

Sodiums sulphates

138. Mark the correct statement

Li₂CO₃ is soluble in water

Basic carbonates of Mg and Cu are soluble in water

Carbonates of Ca, Ba, Sr are soluble in water

Carbonates of Na, K, NH₄ are soluble in water

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

KCl

BaSO₄

NaCl

CuSO₄

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

Ar

Ne

He

Xe

141. Which one has least dissociation energy?

HCL

HBr

HF

HI

142. NaOH is prepared by the method

Down’s cell

Castner Kellner cell

Castner cell

Solvay process

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

40

20

10

30

144. Which of the following statements is incorrect?

Melting and boiling points of alkali metals decrease down the group

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

Sodium is the most abundant metallic element in sea water

Ionic character of alkali metal halides decreases down the group

145. Which one is the weakest oxyacid of chlorine?

HCIO₄

HCIO₃

HCIO₂

HCIO

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

Magnesium

Chromium

Cobalt

Iron

147. 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 contain only one electron in their outermost shell

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

Their ionization potential is less than that of other elements

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

H₂

Cl₂

Na

O₂

149. Which one is the biggest ion?

Ba²⁺

Mg²⁺

Al³⁺

Na⁺

150. Mark the incorrect statement about ‘Li’

‘Li’ has a great tendency to form hydrates

‘Li’ is not effected by air

‘Li’ combine with nitrogen directly to form Lithium nitride

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

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

C > N

Br > Cl

P > Si

Sr > Ca

152. The correct formula of Plaster of Paris is

CaSO₄.2H₂O

CaSO₄. 1/2H₂O

CaSO₄

CaSO₄. 3H₂O

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

Halogens

Oxygen family

Alkali metals

Nitrogen family

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

Lr

Ra

Fr

Rn

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

B

D

C

A

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

NaBr

NaCl

NaF

Nal

157. The colour of I₂ in CCI₄ is

Colourless

Violet

Radish brown

Bluish green

158. Which of the following oxides is peroxide?

Mn₂O

BaO

SO₂

Na₂O₂

159. Alkaline earth metals comes under

Representative elements

Inner transition elements

Halogens

Transition elements

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

F

Br

Cl

I

161. 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

None of these of M²⁺ ions

High energies of hydration of M²⁺ in solution

Diamagnetic nature

162. Plaster of Paris is used

In metallurgical process

As a plaster for walls

As a drying agent

In dentistry and surgery

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

Te

None of these

Se

Po

164. The important ore of lead is

Chalcopyrites

Bauxite

Galena

Haematite

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

I₂

Cl₂

F₂

Br₂

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

Small size of fluorine

More electro negativity of fluorine

Non-metallic nature of fluorine

More electron repulsion in fluorine

167. Electron affinity of sulphur is

Equal to O and Se

More than O and Se

Less than O but more than SE

More than O but less than Se

168. The most powerful oxidizing agent among the halogens is

I₂

Cl₂

Br₂

F₂

169. The type of hybridization of born in diborane is

Sp²-hybridisation

Sp³- hybridization

Sp³d²-hybridisation

Sp-hybridisation

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

Sixth

Third

Fourth

Fifth

171. Calico printing means

Cloth printing

Leather printing

Paper printing

Glass printing

172. Which one is hygroscopic in nature?

HNO3

HCL

HBr

HUO4

173. Which of the following is an inert gas?

Argon

N₂

H₂

O₂

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

HF

HU

HI

HBr

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

70.90 g

88.60 g

35.45 g

17.72 g

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176. The halogen having highest electron affinity is

Chlorine

Fluorine

Bromine

Iodine

177. All halogen are

Reducing agents

Oxidizing agents

Oxidizing as well as reducing agents

Drying agents

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

Cl₂ > Br₂ > I₂ > F₂

F₂ > Cl₂ > Br₂ > I₂

Br₂ > Cl₂ > F₂ > I₂

I₂ > Br₂ > Cl₂ > F₂

179. 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

180. 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 CO₂

O₂ and Ar

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

Ionization energy

Density

Boiling point

Atomic radius

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

Argon

Helium

Neon

Krypton

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

Iron and sulphur

Gallium and Germanium

Proton and silicon

Aluminum and silicon

184. In which form boron exist mostly in nature

Sulphides

Oxides

Nitrides

Oxyborates

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

Silver

Lead

Zinc

Sodium

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

HI

HCl

HBr

HF

187. Identify the incorrect statement with respect to ozone.

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

Ozone is more reactive than dioxygen

Ozone is diamagnetic whereas dioxygen is paramagnetic

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

188. P₂O₅ is heated with water to give

Phosphorous acid

Hypo phosphorous acid

Hypo phosphoric acid

Orthophosphoric acid

189. Mark the nitrate which decomposes differently on heating

RbNO₃

LiNO₃

NaNO₃

KNO₃

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

As salts in ponds

In lakes

In the atmosphere

In sea

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

2,8,2

2,8,18,2

2,8,7

2,8

192. Which statement is correct?

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

Noble gases will all burn in pure oxygen

None of these

Noble gases are all dense gases

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

p-orbitals

s-orbitals

None

d-orbitals

194. Which of the following phosphorus is most reactive?

Violet phosphorus

Scarlet phosphorus

Red phosphorus

White phosphorus

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

NaAlO₂

Na₃AlO₃

Al₂(OH)₄

Na₂Al(OH)₄

196. The alkali metals

Form salt like hydrides

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

Show increasing electro negativity from Li to Cs.

Form salts which are predominantly covalent

197. Halogens exist in the form of

Monoatomic molecules

Various forms

Diatomic molecules

Cannot be predicted

198. Among the halogens the rare element is

Astatine

Iodine

Chlorine

Fluorine

199. Aluminum (III) chloride forms a dimer because

Al belongs to third group

Al has high ionization energy

It cannot form a trimer

Higher co-ordination can be achieved by Al

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

Decrease in resistance with increase in temperature

Decease in resistance with intensity of light

Increase in resistance with increase in temperature

Different resistance under different circumstance

Page 9 of 14

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

Anhydrous calcium chloride

Active charcoal

Phosphorus pentoxidse

Na₃PO₄

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

NH₃ + H₂CO₃ → NH₄HCO₃

NaCl + NH₄HCO₃ → NaHCO₃ + NH₄Cl

2NaOH + CO₂ → Na₂CO₃ + H₂O

CO₃ + H₂O → H₂CO₃

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

Lattice energies if solids

Hydration energies of cations

Inter ionic attraction

Entropy of solution formation

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

Xenon

Radon

Argon

Neon

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

XeF₂

XeF₃

XeF₄

XeF₆

206. The most acidic of the following compounds is

As₂O₃

B₂O₃

Sb₂O₃

P₂O₃

207. Orthophosphoric acid is

Monobasic

Tetrabasic

Dibasic

Tribasic

208. Which one of these is most reactive?

Mg

Na

Pb

K

209. The element that does not form a monoxide is

Germanium

Lead

Tin

Silicon

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

The lattice energy has no role to play in solubility

Both a and b

The lattice energy of BaSO₄ is more than its hydration energy

The hydration energy of Na₂SO₄ is more than its lattice energy

211. 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 restricts to oxidation state – 1 only

It has highest first ionization energy

It has highest electronegativity

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

Al

Na

Fe

Mg

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

He

Rn

Ne

Ar

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

Has the lowest ionization enthalpy

Has the largest size

Has the highest heat of vaporization

In the most readily available gas

215. Vander Waals forces are stronger in

I₂

F₂

Cl₂

Br₂

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

Br

I

Cl

F

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

18

32

10

8

218. Sea weeds are important source of

Bromine

Chlorine

Iron

Iodine

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

Density

Ionization energy

Boiling point

Atomic radius

220. Which of the following is most volatile?

HF

HI

HCl

HBr

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

Free molecules

Free electrons

Free ions

Atoms of sodium and chlorine

222. The structure of XeF₆

None of these

Pyramidal

Tetrahedral

Distorted octahedral

223. The most abundant inert gas in the atmosphere is

He

Ar

Kr

Ne

224. 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

There is special arrangement is cell to keep the layers separate

Three layers have different densities

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

Three layers are maintained at different temperatures

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

Inter – ionic attraction

Lattice energy solids

Entropy of solution formation

Hydration energies of cations

Page 10 of 14

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

Iron

Zinc

Copper

Aluminum

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

Li⁺

Na

H

He⁺

228. Which gas can support combustion?

N₂

CO₂

CO

N₂O

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

O₂+

O₂

O₂-

None of these

230. Which statement is correct about halogens?

They are all diatomic and form univalent ions

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

They are all capable of exhibiting several oxidation states

They are all diatomic and form divalent ions

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

Electro negativity

Ionic radius

Melting point

First ionization energy

232. The noble gases are

Polyatomic

All of these

Diatomic

Monoatomic

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

Calcium oxide

Calcium carbonate

Sodium bicarbonate

Sodium carbonate

234. The noble gas He was discovered by

Frank land and Lockyer

Chadwick

Rutherford

Dorn

235. All the elements of oxygen family are

Polymorphic

Metalloids

Radioactive

Non-metals

236. Cassiterite is an ore of

Sb

Ni

Sn

Mn

237. NaoH is named as caustic soda because

It is used in soda water

It reacts with fats to form soap

It corrodes the organic tissues

It reacts with chlorine gas

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

Low ∆H lattice

Small ionic size of Li⁺

High covalent nature

High ∆H lattice

239. Variable valency is characteristic of

Noble gas

Transition elements

Alkali metals

Halogen

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

Electron affinity

Hydration energy

Lattice energy

Ionization energy

241. Indicate the correct statement

Alkali metal atom has the smallest size in its period

Alkali metals have ns’ configuring in outermost shells

Alkali metals do not reacts with metals

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

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

Atomic number

Isotopic number

Atomic mass

Mass number

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

Cs

Rb

K

Na

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

SF₄

CF₄

HeF₄

XeF₄

245. Which statement is true about IV A group

Whole group consist of non-metals

There is a regular gradation of properties from top to bottom

Marked change of properties

Abrupt change of properties

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

Chlorine

Iodine

Fluorine

Bromine

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

I

Br

F

Cl

248. White enamel of our teeth is

Ca₃(PO₄)₂

CaF₂

CaBr₂

CaCl₂

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

None of these

Sun light

Moisture

Dry air

250. Which of the following is acidic?

SO₃

BeO

HgO

N₂O

Page 11 of 14

251. Which of the following is most electronegative?

Lead

Tin

Carbon

Silicon

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

Reducing solubility of AgBr

Preventing overdeveloping and fogging

Converting silver halides to metallic silver

Dissolving out unreacted silver bromide

253. Polyanion formation is maximum in

Sulphur

Boron

Oxygen

Nitrogen

254. Nitrolim is

CaCN₂ + C

All

CaC₂ + C

Ca(CN)₂ + C

255. 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?

CO₂

SiO₂

CaO

SnO₂

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

They have high electron affinity and ionization energy

All the halogens have electronic configuration ns2P5

All are non-metals

All the halogens react with noble gases to form their halides

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

Sr

Ca

Ba

Mg

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

2

1½

½

5/2

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

11%

33%

22%

44%

260. The shape of gaseous SnCl₂ is

Angular

Tetrahedral

t-shaped

Linear

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

Small size of lithium atom and Li⁺ ion

Extremely high electropositivity of Li

Hydration of Li⁺ ion

Greater hardness of Li

262. Electron affinity depends on

Atomic size

Atomic number

Atomic size and nuclear charge both

Nuclear charge

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

Iron from haematite

Solvay process of sodium carbonate

Ordinary (soda lime) glass

Phosphorus from phosphorite

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

He

O₂

Ar

H₂

265. Select the weakest acid among the following

HCl

HF

HBr

HI

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

Ferrous ammonium sulphate

Magnesium sulphates

Magnesium ammonium phosphate

Calcium sulphates

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

Fluorine is highly reactive

HF molecules form intermolecular H-bonds

Fluorine atom is smaller in size

HF is the weakest acid

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

Na, Ca

Na, Cl

Cl, Br

Ca, Cl

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

Calcium

Beryllium

Barium

Strontium

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

High atomic number

Electron affinity

Hydration energy

Energy dissociation

271. The percentage of lead in lead pencil is

20

80

Zero

70

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

MO

M₂O

M₂O₃

MO₂

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

Weak oxidizing agents

Strong oxidizing agents

Strong reducing agents

Weak reducing agents

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

Inertness

High polarisability

Gaseous nature

Weak van der Waals forces between atoms

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

Expense, but a very uncreative gas

Lighter than air and cheap to produce

Expensive but easy to store in cylinder

Less dense then air and not flammable

Page 12 of 14

276. Oxygen shows oxidation states

-2, +2, +6

+2, +4, +6

+2, -2

-2

277. Mark the correct statement

None of these

Iodine is a solid

Br is more reactive than Cl₂

Cl₂ is more insoluble in water

278. Calcium is obtained by

Electrolysis of solution of calcium chloride in water

Reduction of calcium chloride with carbon

Roasting lime stone

Electrolysis of molten anhydrous or fused calcium chloride

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

Solvated electrons

Sodium amide

Sodium atoms

Sodium hydride

280. 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.

Some nitrogen molecules analogous to O₂

Argon

Greater amount of nitrogen molecules derived from N¹⁵ isotope

CO₂

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

Tri-calcium aluminate

Tri-calcium silicate

Tetra calcium aluminoferrite

Diclacium silicate

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

Al₂O₃

CO₂

CO

NH₃

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

K⁺

S²¯

Ca²⁺

Cl¯

284. Sulphuric acid reacts with PCl₅ to give

Thionyl chloride

Sulphur monochloride

Sulphuryl chloride

Sulphur tetrachloride

285. What is more true about alkali metals?

Reducing agents

Both oxidizing and reducing agents

Hydrolyzing agents

Oxidizing agents

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

Sulphur is present in the mixture as impurity

IV group radicals are precipitated as sulphides

III group radicals are precipitated as hydroxides

Of the oxidation of H₂S gas by some acid radicals

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

None

Chromyl chloride

Chromic chloride

Chromous chloride

288. 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

289. The following has zero valency

Be

Al

Na

Kr

290. Boron compounds behave as Lewis acid because of their

Ionization property

Covalent nature

Acidic nature

Electron deficiency

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

Hl

HF

HBr

HCl

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

Phosphorus

Copper

Magnesium

Mercury

293. 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

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

O > C > N > B

O > C > B > N

B > N > C > O

O > B > C > N

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

Sodium

Iron

Lead

Copper

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

Iodine

Fluorine

Chlorine

Bromine

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

I

F

S

Cl

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

Paramagnetic

Diamagnetic

Ferromagnetic

Antiferromagnetic

299. Identify the correct statement

Elemental Na is a strong oxidizing agent

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

Elemental Na is insoluble in NH₃

Elemental Na is easily oxidized

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

Manganese dioxide

Lead nitrate

Mercuric oxide

Potassium chlorate

Page 13 of 14

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

Bromine

Chlorine

Fluorine

Iodine

302. Mark the smallest atom

F

Br

I

Cl

303. What causes nitrogen to be chemically inert?

Absence of bond polarity

High bond energy

Short internuclear distance

Multiple bond formation in the molecule

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

Flint glass

Crooke’s glass

Soda glass

Borosilicate glass

305. Mark the element which shows greatness inert pair effect

Chlorine

Fluorine

Iodine

Bromine

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

Sulphur dioxide

Iodide

Carbon dioxide

Chlorine

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

HCl

H₂S

HBR

SO₂

308. 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

Zero

10mL

200mL

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

Noble gases

Light metals

Halogens

Heavy metals

310. Which is the strongest acid

Cannot be predicted

HCLO4

HNO3

HCL

311. Strongest reducing agent is

HF

HBr

Hl

HCl

312. Mark the compound which does not exist

AsF₅

PF₅

NCl₅

SbCl₅

313. Sulphuric acid has great affinity for water because

It decomposes the acid

Acid decomposes water

Acid forms hydrates with water

It hydrolyses the acid

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

Fluorine

Chlorine

Iodine

Bromine

315. Which halogen is most electropositive?

Br

Cl

I

F

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

Sodium hydride

Sodium amide

Solvated electrons

Sodium atoms

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

Remains unchanged

Variation is not regular

Increases down the group

Decreases down the group

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

Precipitate Mg metal

Leads to the dissolution of beryllium metal

Precipitate Mg

Have no effect

319. Which of the following has greatest reducing power?

HBr

HI

HCl

HI

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

Al

Be

C

Si

321. A clathrate may be defined as a

Liquid crystal

Cage compound

Solid solution

Mixture

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

Greater hardness

Lower ionization energies

Highest boiling points

Smaller ionic radii

323. Which shows maximum catenation property?

Te

O

Se

S

324. Which of the halogen has highest electronegativity?

Fluorine

Bromine

Chlorine

Iodine

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

F

Al

Si

Tl

Page 14 of 14

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

F

I

Cl

Br

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

Al⁺

Ne

Mg⁺

Li⁺

328. The noble gas forming the maximum number of compounds

He

Ne

Ar

Xe

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

Of localized electrons in it

Borazole is nonpolar compound

Borazole is electron deficient compound

Borazole is polar compound

330. Pyrex glass is a mixture of

Sodium silicate and aluminum borosilicate

Sodium silicate and calcium silicate

Sodium borosilicate and aluminum borosilicate

Sodium silicate and lead silicate

Total Questions:	330
Time Allowed:	80 Minutes
Total Marks:	330
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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Chemistry The Halogens and Noble Gases MCQS Online Test

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