MDCAT Chemistry The Halogens and Noble Gases Online Test

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Chemistry

1. Which one has least dissociation energy?

HI

HBr

HCL

HF

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

Gallium and Germanium

Proton and silicon

Iron and sulphur

Aluminum and silicon

3. Halogens exist in the form of

Cannot be predicted

Monoatomic molecules

Diatomic molecules

Various forms

4. Variable valency is characteristic of

Noble gas

Alkali metals

Transition elements

Halogen

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

Fr

Rn

Ra

Lr

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

HE is used in producing very low temperatures

Ar is used in electric bulbs

Half-life of Rn is only 3-8 days

Ne is obtained during radioactive disintegration

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

Ionization potential

Heat of hydration

Electron affinity

Heat of dissociation

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

Hypo phosphorous acid

Orthophosphoric acid

Metaphosphoric acid

Pyro phosphoric acid

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

CaO

Ca and CO₂

CaCO₃

CaC₂

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

Fe

Pb

Po

Te

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

It forms RX₂

It is a gas at room temperature

It has oxidation state of +4

It forms R₂O₃

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

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

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

13. Which noble gas is used earth quake prediction?

He

Ar

Rn

Kr

14. Which statement is true about IV A group

Abrupt change of properties

Marked change of properties

Whole group consist of non-metals

There is a regular gradation of properties from top to bottom

15. Which halogen is most electropositive?

I

F

Br

Cl

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

Presence of NH₃

Reaction with NaOH

Reaction with brine solution

Reaction with CO₂

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

Greater hardness

Smaller ionic radii

Lower ionization energies

Highest boiling points

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

Nitrogen is highly soluble in water

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

Nitrogen is much less soluble in blood than helium

Helium is much less soluble in blood than nitrogen

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

54

2

10

18

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

The lattice energy of BaSO₄ is more than its hydration energy

Both a and b

The lattice energy has no role to play in solubility

The hydration energy of Na₂SO₄ is more than its lattice energy

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

Preventing overdeveloping and fogging

Converting silver halides to metallic silver

Reducing solubility of AgBr

Dissolving out unreacted silver bromide

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

2,8,7

2,8

2,8,2

2,8,18,2

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

Neon

Oxygen

Nitrogen

Helium

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

14

11

16

10

25. The most powerful oxidizing agent among the halogens is

I₂

F₂

Br₂

Cl₂

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26. Calico printing means

Leather printing

Cloth printing

Paper printing

Glass printing

27. The structure of XeF₆

None of these

Pyramidal

Tetrahedral

Distorted octahedral

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

Si

As

O

P

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

8

18

32

10

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

Iodine

Chlorine

Fluorine

Bromine

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

Cl₂

Br₂

F₂

I₂

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

Ferrous ammonium sulphate

Magnesium sulphates

Calcium sulphates

Magnesium ammonium phosphate

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

HF is the weakest acid

Fluorine is highly reactive

Fluorine atom is smaller in size

HF molecules form intermolecular H-bonds

34. XeF₄ involves which hybridization

Sp²

Sp³d²

Sp²d

Sp

35. Alkaline earth metals comes under

Transition elements

Representative elements

Halogens

Inner transition elements

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

Florigen

Haemoglobin

Chlorophyll

ATP

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

Atomic masses

Nuclear masses

Atomic numbers

Nuclear neutron-proton number rations

38. Mark the incorrect statement about ‘Li’

‘Li’ combine with nitrogen directly to form Lithium nitride

‘Li’ has a great tendency to form hydrates

‘Li’ is not effected by air

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

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

30

40

20

10

40. Among noble gases xenon gives compounds due to

Large size

Structure

Higher I-P

Zero electron affinity

41. Mark the element which shows greatness inert pair effect

Chlorine

Bromine

Fluorine

Iodine

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

Hydration energies of cations

Entropy of solution formation

Inter – ionic attraction

Lattice energy solids

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

BaSO₄

MnS

BaCO₃

ZnS

44. The most abundant inert gas in the atmosphere is

Kr

Ar

He

Ne

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

IV group radicals are precipitated as sulphides

III group radicals are precipitated as hydroxides

Of the oxidation of H₂S gas by some acid radicals

Sulphur is present in the mixture as impurity

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

Free ions

Free molecules

Free electrons

Atoms of sodium and chlorine

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

Lose 3 electrons

Gain 2 electrons

Gain 3 electrons

Lose 2 electrons

48. The halogen which has only one oxidation state is

I

Cl

F

Br

49. HNO₂ acts as an/a

Oxidizing agent

Acid

Reducing agent

All the three

50. 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?

SiO₂

CaO

CO₂

SnO₂

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

Moisture

Sun light

None of these

Dry air

52. 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

53. What causes nitrogen to be chemically inert?

High bond energy

Absence of bond polarity

Short internuclear distance

Multiple bond formation in the molecule

54. Bromine is obtained on a commercial scale from

Carnallite

Caliche

Common salt

Cryolite

55. Which one is the weakest oxyacid of chlorine?

HCIO₃

HCIO₂

HCIO₄

HCIO

56. Number of elements present in 5th period is

8

24

18

32

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

To increase Al production

To act as reducing agent

To make a conducting solution of bauxite

To protect the anodes

58. Orthophosphoric acid is

Tribasic

Dibasic

Monobasic

Tetrabasic

59. Which one halogen is radioactive?

Chlorine

Iodine

Astatine

Bromine

60. Vander Waals forces are stronger in

I₂

Cl₂

Br₂

F₂

61. Fluorine differs from other halogens due to

Low first ionization energy

All

High dissociation energy

Small size

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

None

p-orbitals

s-orbitals

d-orbitals

63. The shape of gaseous SnCl₂ is

t-shaped

Angular

Tetrahedral

Linear

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

Chlorine

Iodine solution

NaCl

Ki

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

Atomic mass

Mass number

Isotopic number

Atomic number

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

Electro negativity

Atomic radius

N/P ratio

Ionization energy

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

Inertness

Weak van der Waals forces between atoms

High polarisability

Gaseous nature

68. Which of the following has highest dipole moment?

NH₃

SbH₃

PH₃

AsH₃

69. Which of the following is most volatile?

HI

HF

HBr

HCl

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

Lower electro positivity

None

Low charge density

Low electronegativity

71. What is more true about alkali metals?

Reducing agents

Hydrolyzing agents

Oxidizing agents

Both oxidizing and reducing agents

72. P₂O₅ is heated with water to give

Hypo phosphoric acid

Phosphorous acid

Orthophosphoric acid

Hypo phosphorous acid

73. The type of hybridization of born in diborane is

Sp²-hybridisation

Sp³d²-hybridisation

Sp-hybridisation

Sp³- hybridization

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

Phosphorus pentoxidse

Na₃PO₄

Active charcoal

Anhydrous calcium chloride

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

NaCl + NH₄HCO₃ → NaHCO₃ + NH₄Cl

2NaOH + CO₂ → Na₂CO₃ + H₂O

NH₃ + H₂CO₃ → NH₄HCO₃

CO₃ + H₂O → H₂CO₃

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76. 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

In the most readily available gas

Has the lowest ionization enthalpy

Has the largest size

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

Electron affinity of chlorine is greater than that of fluorine

Bond energy of fluorine is less than that of chlorine

Fluorine does not form oxoacid

Fluorine cannot be prepared by electrolysis of fused metal fluorides

78. 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

79. The one which does not show variable valency is

Lead

Copper

Barium

Titanium

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

Ar

Ne

Xe

He

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

In the atmosphere

In sea

As salts in ponds

In lakes

82. 6NaOH + Cl₂ → 5Nacl + Naclo₃ in this reaction chlorine is

No change

Reduced

Oxidized

Both oxidized and reduced

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

H

Li⁺

He⁺

Na

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

It decreases gradually down the group

It increases gradually down the group

Noble gases have o heat of vapourization

None of these

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

70.90 g

17.72 g

35.45 g

88.60 g

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

Iron

Zinc

Aluminum

Copper

87. A clathrate may be defined as a

Mixture

Solid solution

Liquid crystal

Cage compound

88. Sulphuric acid reacts with PCl₅ to give

Sulphur monochloride

Sulphur tetrachloride

Thionyl chloride

Sulphuryl chloride

89. Which of the following is most electronegative?

C

Si

Pb

Sn

90. The substance not likely to contain CaCO₃ is

Dolomite

A marble states

Sea shells

Calcried gypsum

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

Mercuric oxide

Manganese dioxide

Lead nitrate

Potassium chlorate

92. Which of the following is not isoelectronic?

Cl¯

O²¯

Na⁺

Mg²⁺

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

Hyponitrous acid

Nitrogen trichloride

Phosphorus trichloride

Nitrosyl chloride

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

Li

N

P

C

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

O₂

H₂

Ar

He

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

To prevent the action of water and salt

Keep away the sharks

Mark the ship lighter

Prevent puncturing by under sea rock

97. 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

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

CO₂

H₂O₂

CO

O₂

99. Which of the following is an inert gas?

O₂

N₂

H₂

Argon

100. Polyanion formation is maximum in

Sulphur

Nitrogen

Boron

Oxygen

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

Sodium bicarbonate

Calcium oxide

Calcium carbonate

Sodium carbonate

102. The noble gases are

Monoatomic

All of these

Diatomic

Polyatomic

103. NaOH is prepared by the method

Castner cell

Solvay process

Down’s cell

Castner Kellner cell

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

Sodium hydride

Sodium atoms

Solvated electrons

Sodium amide

105. 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

Some nitrogen molecules analogous to O₂

CO₂

Argon

106. Oxygen shows oxidation states

+2, -2

-2, +2, +6

-2

+2, +4, +6

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

Diamond

Coke

Graphite

Coal

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

He

Ar

Ne

Rn

109. Which shows maximum catenation property?

Se

O

Te

S

110. Permonosulphuric acid is known as

Sulphuric acid

Carlo’s acid

None of these

Marshall’s acid

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

High ∆H lattice

High covalent nature

Low ∆H lattice

Small ionic size of Li⁺

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

Copper

Lead

Iron

Sodium

113. Cassiterite is an ore of

Ni

Sb

Mn

Sn

114. Which of the following has greatest reducing power?

HCl

HI

HBr

HI

115. 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 has highest first ionization energy

It has highest electronegativity

It restricts to oxidation state – 1 only

It is more reactive than other halogens

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

CO₂

NH₃

CO

Al₂O₃

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

Mixture of xenon and nitrogen

Mixture of argon and oxygen

Mixture of neon and oxygen

Mixture of helium and oxygen

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

Li

F

B

Ne

119. Pyrex glass is a mixture of

Sodium silicate and aluminum borosilicate

Sodium silicate and lead silicate

Sodium silicate and calcium silicate

Sodium borosilicate and aluminum borosilicate

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

Variation is not regular

Remains unchanged

Decreases down the group

Increases down the group

121. The noble gas He was discovered by

Chadwick

Frank land and Lockyer

Dorn

Rutherford

122. Mark the correct statement

Cl₂ is more insoluble in water

None of these

Br is more reactive than Cl₂

Iodine is a solid

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

Neon

Helium

Argon

Radon

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

Br₂ > Cl₂ > F₂ > I₂

F₂ > Cl₂ > Br₂ > I₂

I₂ > Br₂ > Cl₂ > F₂

Cl₂ > Br₂ > I₂ > F₂

125. 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

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

33%

11%

44%

22%

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

HF

HU

HI

HBr

128. Aluminum (III) chloride forms a dimer because

It cannot form a trimer

Al has high ionization energy

Higher co-ordination can be achieved by Al

Al belongs to third group

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

Mg

Rb

Cl

Li

130. Who reported first noble gas?

Ramsay

Cavendish

Frank land

J.J Thomson

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

Heavy metals

Light metals

Halogens

Noble gases

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

I

Cl

F

Br

133. The alkali metals

Form salts which are predominantly covalent

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.

134. 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 diatomic and form divalent ions

They are all capable of exhibiting several oxidation states

135. Which halogen have most corrosive action on skin?

Chlorine

I₂

Br₂

F₂

136. Cl₂O₇ is best prepared by passing by

Chlorine and oxygen over hot silver chlorate

Chlorine gas over hot HgO

Hydrogen chloride over phosphorus pentoxide

Perchloric acid (CHIO₄) over hot silver oxide

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

HCl

HBR

H₂S

SO₂

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

Al

Be

C

Si

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

Na

Cs

K

Rb

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

It oxidizes potassium iodide

It cannot act as a bleaching agent

It oxidizes lead sulphides

It oxidizes mercury

141. The correct formula of Plaster of Paris is

CaSO₄. 3H₂O

CaSO₄. 1/2H₂O

CaSO₄.2H₂O

CaSO₄

142. Mark the nitrate which decomposes differently on heating

KNO₃

LiNO₃

NaNO₃

RbNO₃

143. Plaster of Paris is used

In dentistry and surgery

In metallurgical process

As a plaster for walls

As a drying agent

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

Mg

Fe

Na

Al

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

Increase in resistance with increase in temperature

Decrease in resistance with increase in temperature

Decease in resistance with intensity of light

Different resistance under different circumstance

146. The last orbit of argon would have electrons

18

6

2

8

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

Nitrogen family

Oxygen family

Alkali metals

Halogens

148. The noble gas forming the maximum number of compounds

Ne

Xe

He

Ar

149. Alkali metals are generally extracted by

Double decomposition methods

Displacement methods

Electrolytic methods

Reduction methods

150. Calcium is obtained by

Electrolysis of molten anhydrous or fused calcium chloride

Reduction of calcium chloride with carbon

Roasting lime stone

Electrolysis of solution of calcium chloride in water

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

BaSO₄

NaCl

KCl

CuSO₄

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

K⁺

O³¯

OH¯

O₂¯²

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

C > N

P > Si

Sr > Ca

Br > Cl

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

F

O

U

Br

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

F

Cl

I

Br

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

Chromyl chloride

Chromic chloride

Chromous chloride

None

157. Select the weakest acid among the following

HCl

HI

HBr

HF

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

Ne

Mg⁺

Al⁺

Li⁺

159. The most acidic of the following compounds is

B₂O₃

P₂O₃

Sb₂O₃

As₂O₃

160. Boron compounds behave as Lewis acid because of their

Electron deficiency

Covalent nature

Ionization property

Acidic nature

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

Sodium thiosulphate

Sodium sulphides

Sodium persulphate

Sodiums sulphates

162. Which of the noble gas has highest polarizabilities?

Kr

Xe

Ar

He

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

Bromine

Fluorine

Iodine

Chlorine

164. Which of the following is most electronegative?

Tin

Silicon

Lead

Carbon

165. I₂ is solid at room temperature because

It possess hydrogen bonding

It is highly electronegative

It has metallic bond

Its molecule has a large size

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

B

D

A

C

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

None of these of M²⁺ ions

High lattice energy of M²⁺ ions in the solid state

High energies of hydration of M²⁺ in solution

Diamagnetic nature

168. All halogen are

Reducing agents

Oxidizing agents

Oxidizing as well as reducing agents

Drying agents

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

Kr

Xe

Ar

Rn

170. 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

Hydrating sand and gravel mixed with cement

Keeping it cool

171. Which noble gas is used in labors?

Argon

Helium

Krypton

Neon

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

Castner

Haber

Solvay

Chamber

173. 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

174. The halogen that is most easily reduced is

I₂

F₂

Br₂

Cl₂

175. Common oxidation state of boron are

-3

+3

+1

+3,-3

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

Low melting point

High ionization energy

Their ions are isoelectronic with noble gases

Low electronegativity

177. 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

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

Tri-calcium silicate

Tri-calcium aluminate

Tetra calcium aluminoferrite

Diclacium silicate

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

12

16

7

14

180. Crystalline form of sulphur stale at room temperature is

Plastic sulphur

Monoclinic sulphur

Prismatic sulphur

Rhombic sulphur

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

Te

Se

Po

None of these

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

U₂>Br₂>I₂>F₂

I₂>Br₂>U₂>F₂

F₂>Cl₂>Br₂>I2

I₂>F₂>Br₂>U₂

183. Which of the following phosphorus is most reactive?

Violet phosphorus

Red phosphorus

White phosphorus

Scarlet phosphorus

184. Which one is hygroscopic in nature?

HBr

HUO4

HCL

HNO3

185. 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

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

Borax

Gypsum

Alum

Calomel

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

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

There is no change in the nuclear charge

188. Indicate the correct statement

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

Alkali metal atom has the smallest size in its period

189. White enamel of our teeth is

CaF₂

CaCl₂

Ca₃(PO₄)₂

CaBr₂

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

Third

Sixth

Fifth

Fourth

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

Ba

Li

K

Rb

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

O₂ and He

O₂ and Ar

O₂ and CO₂

CO₂ and Ar

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

Ca, Cl

Cl, Br

Na, Ca

Na, Cl

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

I

F

Cl

Br

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

Cl¯

S²¯

Ca²⁺

K⁺

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

Ionization energy

Density

Boiling point

Atomic radius

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

All the halogens react with noble gases to form their halides

They have high electron affinity and ionization energy

All the halogens have electronic configuration ns2P5

All are non-metals

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

H₂

Cl₂

Na

O₂

199. Mark the compound which does not exist

SbCl₅

NCl₅

PF₅

AsF₅

200. Which gas can support combustion?

N₂

CO₂

CO

N₂O

Page 9 of 14

201. AlCl₃ flumes in moist air because

HCl is formed in moist air

It is highly hygroscopic

It is covalent

It is very volatile

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

It is used furniture polish

It is as filter for soap

It is used as fire proof in textile

It is used in the formation white cement

203. Sulphuric acid has great affinity for water because

It hydrolyses the acid

Acid decomposes water

Acid forms hydrates with water

It decomposes the acid

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

F¯

Li⁺

O²¯

B³⁺

205. The acid which has a peroxy linkage is

Pyrosulphuric acid

Dithionic acid

Sulphurous acid

Carlo’s acid

206. The percentage of lead in lead pencil is

Zero

70

20

80

207. An atom with high electro negativity has

Low electron affinity

Large size

Low ionization potential

High ionization potential

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

Cl

S

F

I

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

Insoluble in water

Variable trend

Less soluble in water

Highly soluble in water

210. SO3 is not dissolve directly in H2O because

SO₃ is insoluble in H₂O

The reaction does not go to completion

The reaction is quite slow

The reaction is highly exothermic

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

Xenon

Neon

Radon

Argon

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

Cl > F > Br

Br > Cl > F

F > Br > Cl

F > Cl > Br

213. Among the halogens the rare element is

Astatine

Iodine

Fluorine

Chlorine

214. Which halogen has application in medicines mostly?

Cl₂

None

I₂

Br2

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

Small size of fluorine

Non-metallic nature of fluorine

More electro negativity of fluorine

More electron repulsion in fluorine

216. Which is the most volatile compound?

HI

HCl

HBr

HF

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

Alumina

Silica

Iron oxide

Magnesia

218. The following has zero valency

Kr

Be

Na

Al

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

Weak reducing agents

Strong oxidizing agents

Weak oxidizing agents

Strong reducing agents

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

Tl

Al

Si

F

221. Bond angle is minimum for

H₂Se

H₂Te

H₂S

H₂O

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

Astatine

Francium

Polonium

Radium

223. Neon glows in discharge tube as

Greenish

Bluish

Radish

Yellowish

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

Sodium hydride

Sodium azide

Sodium nitride

Sodium amide

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

NaAlO₂

Na₃AlO₃

Na₂Al(OH)₄

Al₂(OH)₄

Page 10 of 14

226. The melting point in lowest for

Sr

Mg

Ca

Be

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

Electron affinity

Hydration energy of ion

Energy dissociation

High atomic number

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

Hydration energy

Energy dissociation

Electron affinity

High atomic number

229. Nitrolim is

Ca(CN)₂ + C

All

CaC₂ + C

CaCN₂ + C

230. Which is the strongest acid?

HClO₃

HClO₄

HClO₂

HClO

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

Carbon dioxide

Iodide

Sulphur dioxide

Chlorine

232. The ionization potential is lowest for the

Alkali metals

Inert gases

Alkaline earth metals

Halogens

233. Which is valence shell configuration of halogens?

nS₂, nP₆

nS₂, nP₃

NS₂, nP₄

ns₂, nP₅

234. Which one is the biggest ion?

Na⁺

Mg²⁺

Al³⁺

Ba²⁺

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

SF₄

CF₄

HeF₄

XeF₄

236. Electron affinity depends on

Atomic size

Atomic number

Nuclear charge

Atomic size and nuclear charge both

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

HBr

HI

HCl

HF

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

Mg > Na > Al > Si

Na > Mg > Al > Si

Si > Mg > Al > Na

Al > Mg > Na > Si

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

Cl₂

H₂

H₂O

O₂

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

As an oxidizer in metallurgy

For preparing artificial

As an abrasive in the form of abundum

In form of foil for wrapping

241. 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

242. Identify the incorrect statement with respect to ozone.

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

Ozone is more reactive than dioxygen

Ozone is diamagnetic whereas dioxygen is paramagnetic

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

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

Hl

HBr

HCl

HF

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

F₂

Br₂

Cl₂

I₂

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

The first ionization energy

Ionic character of the compound

The stability of +2 oxidation state

The basic character of the oxides

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

Small ionic size

Strongly bond valence electrons

Metallic properties

Large atomic size

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

Solvay process of sodium carbonate

Iron from haematite

Ordinary (soda lime) glass

Phosphorus from phosphorite

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

Cu

Ba

Cs

Cr

249. The noble gases consist of

Triatomic molecules

Single free atoms

Diatomic molecules

Atoms linked by weak bonds

250. Freon-12 is used as a

Herbicide

Refrigerant

Insecticide

Fungicide

Page 11 of 14

251. Strongest reducing agent is

HF

Hl

HBr

HCl

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

None of these

Dipole-dipole forces

Strongest vanderwaal’s force

H. bonding

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

Chlorine

Iodine

Bromine

Fluorine

254. The halogen having highest electron affinity is

Fluorine

Iodine

Bromine

Chlorine

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

Iron

Cobalt

Chromium

Magnesium

256. 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-4, b-1, c-3, d-2

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

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

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

Francium

Astatine

Radium

Polonium

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

Lattice energy

Ionization energy

Hydration energy

Electron affinity

259. Which one boric acid is stable one?

H₃BO₃

HBO₃

H₂B₄O₇

None of these

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

Linear, basic

Linear acidic

Tetrahedral, acidic

Angular, disc

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

Fluoride ion

Nitride ion

Sodium ion

Chloride ion

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

Inter ionic attraction

Hydration energies of cations

Lattice energies if solids

Entropy of solution formation

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

Fe

Pb

S

Si

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

Less dense then air and not flammable

Lighter than air and cheap to produce

Expensive but easy to store in cylinder

Expense, but a very uncreative gas

265. Which of the following is correct?

Magnesium reacts with cold water and liberates hydrogen

Magnallium is one alloy of Mg and zinc

Sodium reduces CO₂ to carbon

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

266. The bleaching action of chlorine is due to

Hydrogenation

Oxidation

Chlorination

Reduction

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

XeF₆

XeF₄

XeF₃

XeF₂

268. Which one of these is most reactive?

Mg

K

Na

Pb

269. The metal used for making radiation shield is

Zn

Pb

Fe

Al

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

NaF

NaBr

Nal

NaCl

271. Hydrochloric acid at 25°C is

Ionic and gas

None of these

Covalent and liquid

Ionic and liquid

272. 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

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

Three layers are maintained at different temperatures

Three layers have different densities

There is special arrangement is cell to keep the layers separate

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

Of easy extraction of Al from it

Bauxite is available in large quantity

Bauxite contains maximum of Al

Bauxite is less impure

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

Density

Boiling point

Ionization energy

Atomic radius

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

With inert gases

With halogens

With alkali metals

None of these

Page 12 of 14

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

Borazole is polar compound

Of localized electrons in it

Borazole is electron deficient compound

Borazole is nonpolar compound

277. The element that does not form a monoxide is

Germanium

Lead

Tin

Silicon

278. All the elements of oxygen family are

Metalloids

Non-metals

Radioactive

Polymorphic

279. Sea weeds are important source of

Bromine

Chlorine

Iodine

Iron

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

Greater hardness of Li

Hydration of Li⁺ ion

Small size of lithium atom and Li⁺ ion

Extremely high electropositivity of Li

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

Nitrous oxide

Nitrogen dioxide

Nitric oxide

Dinitrogen tetraoxide

282. The colour of I₂ in CCI₄ is

Violet

Colourless

Bluish green

Radish brown

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

Potassium only

Potassium and magnesium

Magnesium and chlorine

Magnesium only

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

Oxygen

Boron

Nitrogen

Carbon

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

Ionic

Coordinate

Covalent

Metallic

286. Heavy water is obtained by

Dissolving heavy salt in water

Prolonged electrolysis of water

Removing impurities of calcium and magnesium form water

Simple distillation of water

287. Electron affinity of sulphur is

More than O but less than Se

Less than O but more than SE

Equal to O and Se

More than O and Se

288. Electropositive character increase down the group due to

Increase in atomic size of elements

All of these

Decrease in electronegativity of the elements

Decrease in I.P

289. NaoH is named as caustic soda because

It is used in soda water

It corrodes the organic tissues

It reacts with fats to form soap

It reacts with chlorine gas

290. Which one of them is monoatomic?

Oxygen

Nitrogen

Neon

Fluorine

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

Soda glass

Crooke’s glass

Borosilicate glass

Flint glass

292. Which of the following is acidic?

BeO

N₂O

SO₃

HgO

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

Strontium

Barium

Calcium

Beryllium

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

The ratio of their charge to size is nearly the same

Both have similar electronic configurations

Both are found together in nature

Both have nearly the same size

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

Sodium amide

Sodium atoms

Sodium hydride

Solvated electrons

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

Neon

Krypton

Argon

Helium

297. Which is the strongest acid

HCL

HCLO4

Cannot be predicted

HNO3

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

Br

I

Cl

F

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

12, 20, 56, 88

1, 12, 30, 4, 62

9, 17, 35, 53

37, 19, 3, 55

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

Ferromagnetic

Antiferromagnetic

Paramagnetic

Diamagnetic

Page 13 of 14

301. The name of CaSO₄. ½ H₂O is

Epsom salt

Plaster of Paris

Dolomite

Gypsum

302. 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 is more reactive than other halogens

It restricts to oxidation state – 1 only

It has highest first I.E

It has highest E.N

303. 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 bromide

A sulphate

A nitrate

304. Which gives green colour in fireworks?

Sodium

Barium

Calcium

Potassium

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

Oxygen

Calcium oxide

Hypochlorous acid

Chlorine

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

Mg

Ca

Sr

Ba

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

O₂-

O₂+

None of these

O₂

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

MO

M₂O₃

M₂O

MO₂

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

Silver

Zinc

Lead

Sodium

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

½

1½

2

5/2

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

Li

He

Zn

N

312. In which form boron exist mostly in nature

Sulphides

Nitrides

Oxides

Oxyborates

313. Which one has highest electron affinity?

Cl

F

I

Br

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

Strong acid and strong base

Weak acid and strong base

Strong acid and weak base

Weak acid and weak base

315. Which statement is correct?

Noble gases will all burn in pure oxygen

Noble gases are all dense gases

None of these

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

316. Which of the following is true for magnesium?

It is manufactured by electrolysis of aqueous magnesium chloride

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

317. 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

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

F

I

Cl

Br

319. Which of the halogen has highest electronegativity?

Chlorine

Fluorine

Iodine

Bromine

320. Which of the following oxides is peroxide?

BaO

Na₂O₂

Mn₂O

SO₂

321. Mark the smallest atom

F

I

Br

Cl

322. XeF₄ on partial hydrolysis produces

XeOF₂

XeO₃

XeF₂

XeOF₄

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

Precipitate Mg metal

Have no effect

Precipitate Mg

Leads to the dissolution of beryllium metal

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

Copper

Mercury

Magnesium

Phosphorus

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

First ionization energy

Electro negativity

Melting point

Ionic radius

Page 14 of 14

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

Fluorine

Bromine

Iodine

Chlorine

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

It changes into calcium chloride and calcium chlorate

It changes into CaCl₂ and Ca(OH)₂

It absorbs moisture

It change into calcium hypochlorate

328. The important ore of lead is

Haematite

Bauxite

Chalcopyrites

Galena

329. Hypo is used in photography for

Developing picture

Picture printed

The colour of picture

The fixation of picture

330. Identify the correct statement

Plaster of Pairs can be obtained by partial oxidation of gypsum

Gypsum is obtained by heating plaster of pairs

Gypsum contains a lower percentage of calcium than plaster of pairs

Plaster of Paris is obtained by partial oxidation of gypsum

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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