ECAT Chemistry The Halogens and Noble Gases Chapter Test Online

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Chemistry

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

Lattice energies if solids

Entropy of solution formation

Inter ionic attraction

Hydration energies of cations

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

It absorbs moisture

It change into calcium hypochlorate

It changes into calcium chloride and calcium chlorate

It changes into CaCl₂ and Ca(OH)₂

3. 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 sulphate

A bromide

A nitrate

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

Barium

Calcium

Strontium

Beryllium

5. Which of the following oxides is peroxide?

Na₂O₂

Mn₂O

BaO

SO₂

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

Potassium and magnesium

Magnesium only

Potassium only

Magnesium and chlorine

7. Plaster of Paris is used

As a plaster for walls

In metallurgical process

In dentistry and surgery

As a drying agent

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

Electron affinity of chlorine is greater than that of fluorine

Fluorine cannot be prepared by electrolysis of fused metal fluorides

Bond energy of fluorine is less than that of chlorine

Fluorine does not form oxoacid

9. 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

10. Vander Waals forces are stronger in

Br₂

I₂

F₂

Cl₂

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

Reducing solubility of AgBr

Preventing overdeveloping and fogging

Dissolving out unreacted silver bromide

Converting silver halides to metallic silver

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

He

H₂

Ar

O₂

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

Lower ionization energies

Greater hardness

Highest boiling points

Smaller ionic radii

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

10

2

18

54

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

Chromyl chloride

None

Chromic chloride

Chromous chloride

16. Identify the correct statement

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

Gypsum is obtained by heating plaster of pairs

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

Zinc

Iron

Copper

Aluminum

18. Which of the following is most electronegative?

Silicon

Carbon

Tin

Lead

19. Mark the correct statement

Carbonates of Ca, Ba, Sr are soluble in water

Basic carbonates of Mg and Cu are soluble in water

Carbonates of Na, K, NH₄ are soluble in water

Li₂CO₃ is soluble in water

20. Which noble gas is used in labors?

Neon

Krypton

Helium

Argon

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

Free electrons

Atoms of sodium and chlorine

Free ions

Free molecules

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

Chlorophyll

ATP

Haemoglobin

Florigen

23. In which form boron exist mostly in nature

Oxyborates

Nitrides

Oxides

Sulphides

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

Ionic radius

First ionization energy

Electro negativity

Melting point

25. Alkaline earth metals comes under

Representative elements

Halogens

Transition elements

Inner transition elements

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

Cl

Mg

Rb

Li

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

2,8,18,2

2,8,2

2,8

2,8,7

28. Number of elements present in 5th period is

8

18

32

24

29. Cl₂O₇ is best prepared by passing by

Perchloric acid (CHIO₄) over hot silver oxide

Chlorine gas over hot HgO

Chlorine and oxygen over hot silver chlorate

Hydrogen chloride over phosphorus pentoxide

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

Silver

Sodium

Zinc

Lead

31. Electron affinity of sulphur is

More than O but less than Se

More than O and Se

Equal to O and Se

Less than O but more than SE

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

F

Si

Tl

Al

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

The hydration energy of Na₂SO₄ is more than its lattice energy

The lattice energy has no role to play in solubility

The lattice energy of BaSO₄ is more than its hydration energy

Both a and b

34. Which shows maximum catenation property?

O

Te

S

Se

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

Covalent

Metallic

Coordinate

Ionic

36. Which one is the biggest ion?

Na⁺

Al³⁺

Mg²⁺

Ba²⁺

37. Which one is the weakest oxyacid of chlorine?

HCIO

HCIO₃

HCIO₂

HCIO₄

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

14

11

10

16

39. The substance not likely to contain CaCO₃ is

Sea shells

A marble states

Calcried gypsum

Dolomite

40. Sulphuric acid has great affinity for water because

Acid decomposes water

Acid forms hydrates with water

It hydrolyses the acid

It decomposes the acid

41. 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

42. HNO₂ acts as an/a

Oxidizing agent

All the three

Reducing agent

Acid

43. NaoH is named as caustic soda because

It corrodes the organic tissues

It reacts with fats to form soap

It is used in soda water

It reacts with chlorine gas

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

Na > Mg > Al > Si

Mg > Na > Al > Si

Si > Mg > Al > Na

Al > Mg > Na > Si

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

NaCl

Ki

Iodine solution

Chlorine

46. What causes nitrogen to be chemically inert?

Short internuclear distance

Absence of bond polarity

High bond energy

Multiple bond formation in the molecule

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

Cl

F

I

Br

48. Polyanion formation is maximum in

Oxygen

Sulphur

Boron

Nitrogen

49. Electropositive character increase down the group due to

Decrease in I.P

Increase in atomic size of elements

All of these

Decrease in electronegativity of the elements

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?

SnO₂

SiO₂

CaO

CO₂

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51. The most powerful oxidizing agent among the halogens is

Cl₂

F₂

Br₂

I₂

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

Strongly bond valence electrons

Metallic properties

Small ionic size

Large atomic size

53. I₂ is solid at room temperature because

It possess hydrogen bonding

It has metallic bond

It is highly electronegative

Its molecule has a large size

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

Cs

K

Rb

Na

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

10

30

40

20

56. The most abundant inert gas in the atmosphere is

Kr

Ar

He

Ne

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

Si

Fe

S

Pb

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

Alumina

Magnesia

Silica

Iron oxide

59. Which of the following statements is incorrect?

Melting and boiling points of alkali metals decrease down the group

Sodium is the most abundant metallic element in sea water

Ionic character of alkali metal halides decreases down the group

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

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

Magnesium sulphates

Calcium sulphates

Magnesium ammonium phosphate

Ferrous ammonium sulphate

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

Diamagnetic nature

None of these of M²⁺ ions

High energies of hydration of M²⁺ in solution

High lattice energy of M²⁺ ions in the solid state

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

Mixture of neon and oxygen

Mixture of xenon and nitrogen

Mixture of argon and oxygen

Mixture of helium and oxygen

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

Mg

Al

Na

Fe

64. The element that does not form a monoxide is

Silicon

Germanium

Lead

Tin

65. The noble gas forming the maximum number of compounds

Ne

Xe

He

Ar

66. Mark the incorrect statement about ‘Li’

‘Li’ is not effected by air

‘Li’ combine with nitrogen directly to form Lithium nitride

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

‘Li’ has a great tendency to form hydrates

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

Ne

Li⁺

Mg⁺

Al⁺

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

Hl

HBr

HF

HCl

69. Mark the correct statement

Cl₂ is more insoluble in water

Iodine is a solid

Br is more reactive than Cl₂

None of these

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

Ionization energy

Lattice energy

Electron affinity

Hydration energy

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

Kr

Ar

Rn

Xe

72. All halogen are

Drying agents

Reducing agents

Oxidizing as well as reducing agents

Oxidizing agents

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

Strong oxidizing agents

Weak reducing agents

Weak oxidizing agents

Strong reducing agents

74. Freon-12 is used as a

Refrigerant

Herbicide

Insecticide

Fungicide

75. Hypo is used in photography for

Developing picture

The fixation of picture

The colour of picture

Picture printed

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76. 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

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

P

Si

As

O

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

F

Cl

Br

I

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

A

D

B

C

80. The most acidic of the following compounds is

Sb₂O₃

As₂O₃

P₂O₃

B₂O₃

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

Halogens

Noble gases

Heavy metals

Light metals

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

Keeping it cool

Hydrating sand and gravel mixed with cement

Converting sand into silici acid

Developing interlocking needle like crystals of hydrated silicates

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

I

Br

Cl

F

84. Sulphuric acid reacts with PCl₅ to give

Thionyl chloride

Sulphur tetrachloride

Sulphur monochloride

Sulphuryl chloride

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

He

N

Li

Zn

86. Which of the noble gas has highest polarizabilities?

Kr

He

Ar

Xe

87. 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

88. Which of the following has highest dipole moment?

NH₃

SbH₃

AsH₃

PH₃

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

It oxidizes potassium iodide

It cannot act as a bleaching agent

It oxidizes mercury

It oxidizes lead sulphides

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

It forms RX₂

It has oxidation state of +4

It forms R₂O₃

It is a gas at room temperature

91. Which statement is true about IV A group

Abrupt change of properties

There is a regular gradation of properties from top to bottom

Marked change of properties

Whole group consist of non-metals

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

OH¯

O³¯

K⁺

O₂¯²

93. 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

Have no effect

Precipitate Mg

94. Alkali metals are generally extracted by

Displacement methods

Reduction methods

Electrolytic methods

Double decomposition methods

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

Fluorine

Iodine

Chlorine

Bromine

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

Ca and CO₂

CaCO₃

CaO

CaC₂

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

S²¯

K⁺

Cl¯

Ca²⁺

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

Na, Ca

Cl, Br

Na, Cl

Ca, Cl

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

Low ∆H lattice

High ∆H lattice

Small ionic size of Li⁺

High covalent nature

100. The ionization potential is lowest for the

Alkaline earth metals

Alkali metals

Inert gases

Halogens

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

H₂O₂

CO

O₂

CO₂

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

P

C

Li

N

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

Krypton

Argon

Helium

Neon

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

Bromine

Iodine

Fluorine

Chlorine

105. 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 restricts to oxidation state – 1 only

It has highest electronegativity

It is more reactive than other halogens

106. Which of the following has greatest reducing power?

HI

HBr

HI

HCl

107. The halogen which has only one oxidation state is

I

Cl

Br

F

108. Mark the compound which does not exist

NCl₅

PF₅

SbCl₅

AsF₅

109. Mark the nitrate which decomposes differently on heating

NaNO₃

KNO₃

RbNO₃

LiNO₃

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

Iodine

Fluorine

Bromine

Chlorine

111. Which statement is correct?

Noble gases will all burn in pure oxygen

None of these

Noble gases are all dense gases

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

112. The percentage of lead in lead pencil is

80

Zero

20

70

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

Radium

Francium

Astatine

Polonium

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

Coke

Graphite

Diamond

Coal

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

Na₃AlO₃

Na₂Al(OH)₄

Al₂(OH)₄

NaAlO₂

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

Sodium bicarbonate

Calcium oxide

Sodium carbonate

Calcium carbonate

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

CaO has high m.p.

Kl is soluble in benzene

Lattice energy of CaO is much higher than that of Kl

Kl has high m.p.

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

Their ionization potential is less than that of other elements

They contain only one electron in their outermost shell

119. Common oxidation state of boron are

-3

+3

+1

+3,-3

120. The important ore of lead is

Haematite

Chalcopyrites

Bauxite

Galena

121. Which one boric acid is stable one?

HBO₃

None of these

H₂B₄O₇

H₃BO₃

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

Hypochlorous acid

Calcium oxide

Oxygen

Chlorine

123. Heavy water is obtained by

Prolonged electrolysis of water

Dissolving heavy salt in water

Removing impurities of calcium and magnesium form water

Simple distillation of water

124. Which one halogen is radioactive?

Iodine

Chlorine

Bromine

Astatine

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

Sr

Ba

Mg

Ca

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

Fr

Rn

Lr

Ra

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

Ionic character of the compound

The basic character of the oxides

The first ionization energy

The stability of +2 oxidation state

128. The noble gases are

Diatomic

Polyatomic

All of these

Monoatomic

129. The shape of gaseous SnCl₂ is

Linear

t-shaped

Angular

Tetrahedral

130. Which gas can support combustion?

CO₂

CO

N₂

N₂O

131. Permonosulphuric acid is known as

Marshall’s acid

Sulphuric acid

Carlo’s acid

None of these

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

14

16

12

7

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

8

32

18

10

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

F₂

Br₂

Cl₂

I₂

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

Ferromagnetic

Diamagnetic

Paramagnetic

Antiferromagnetic

136. Neon glows in discharge tube as

Yellowish

Bluish

Greenish

Radish

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

Na₃PO₄

Active charcoal

Phosphorus pentoxidse

Anhydrous calcium chloride

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

Carbon

Oxygen

Nitrogen

Boron

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

Cs

Ba

Cr

Cu

140. Which of the following is acidic?

SO₃

HgO

N₂O

BeO

141. Bromine is obtained on a commercial scale from

Carnallite

Caliche

Common salt

Cryolite

142. The following has zero valency

Na

Kr

Be

Al

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

Gain 2 electrons

Lose 2 electrons

Gain 3 electrons

Lose 3 electrons

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

Variable trend

Less soluble in water

Insoluble in water

Highly soluble in water

145. XeF₄ involves which hybridization

Sp³d²

Sp²d

Sp²

Sp

146. Which of the following is most electronegative?

Pb

Si

C

Sn

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

Ar

Ne

He

Xe

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

Br > Cl

Sr > Ca

C > N

P > Si

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

Neon

Helium

Oxygen

Nitrogen

150. Which of the following is not isoelectronic?

Mg²⁺

Na⁺

Cl¯

O²¯

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

F

S

I

Cl

152. All the elements of oxygen family are

Polymorphic

Non-metals

Radioactive

Metalloids

153. Crystalline form of sulphur stale at room temperature is

Prismatic sulphur

Plastic sulphur

Rhombic sulphur

Monoclinic sulphur

154. Mark the element which shows greatness inert pair effect

Fluorine

Iodine

Bromine

Chlorine

155. Fluorine differs from other halogens due to

Small size

High dissociation energy

Low first ionization energy

All

156. Hydrochloric acid at 25°C is

Covalent and liquid

Ionic and liquid

Ionic and gas

None of these

157. 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

158. 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

159. White enamel of our teeth is

CaBr₂

Ca₃(PO₄)₂

CaF₂

CaCl₂

160. Electron affinity depends on

Atomic size

Atomic number

Nuclear charge

Atomic size and nuclear charge both

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

Flint glass

Soda glass

Crooke’s glass

Borosilicate glass

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

Atomic numbers

Atomic masses

Nuclear neutron-proton number rations

Nuclear masses

163. Variable valency is characteristic of

Transition elements

Halogen

Alkali metals

Noble gas

164. Deliquescence is a process in which a solid

Absorbs moisture and remain solid

Increases the water of crystallization

Absorbs moisture and turn into liquid

Loses water of crystallization

165. Which of the following is an inert gas?

O₂

N₂

Argon

H₂

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

Nitrogen is much less soluble in blood than helium

Nitrogen is highly soluble in water

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

Helium is much less soluble in blood than nitrogen

167. 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

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

For preparing artificial

As an oxidizer in metallurgy

As an abrasive in the form of abundum

In form of foil for wrapping

169. The noble gas He was discovered by

Frank land and Lockyer

Rutherford

Dorn

Chadwick

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

Nitrous oxide

Dinitrogen tetraoxide

Nitric oxide

Nitrogen dioxide

171. Pyrex glass is a mixture of

Sodium silicate and lead silicate

Sodium silicate and calcium silicate

Sodium silicate and aluminum borosilicate

Sodium borosilicate and aluminum borosilicate

172. The structure of XeF₆

Pyramidal

Distorted octahedral

None of these

Tetrahedral

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

HF is the weakest acid

Fluorine is highly reactive

HF molecules form intermolecular H-bonds

Fluorine atom is smaller in size

174. The correct formula of Plaster of Paris is

CaSO₄. 1/2H₂O

CaSO₄

CaSO₄.2H₂O

CaSO₄. 3H₂O

175. 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

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176. The acid which has a peroxy linkage is

Carlo’s acid

Dithionic acid

Pyrosulphuric acid

Sulphurous acid

177. The last orbit of argon would have electrons

18

2

6

8

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

Cobalt

Magnesium

Chromium

Iron

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

HF

HI

HCl

HBr

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

HCl

SO₂

H₂S

HBR

181. Which one has highest electron affinity?

I

Cl

F

Br

182. Orthophosphoric acid is

Tetrabasic

Monobasic

Dibasic

Tribasic

183. The colour of I₂ in CCI₄ is

Bluish green

Violet

Colourless

Radish brown

184. 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.

Argon

Some nitrogen molecules analogous to O₂

CO₂

Greater amount of nitrogen molecules derived from N¹⁵ isotope

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

Chlorine

Carbon dioxide

Iodide

Sulphur dioxide

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

Atomic number increases

Additive electrons are accommodated in new electron level

Atomic mass increases

Effective nuclear charge increases

187. Which statement is correct about halogens?

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

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

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

Mercury

Copper

Magnesium

Phosphorus

189. Boron compounds behave as Lewis acid because of their

Ionization property

Acidic nature

Covalent nature

Electron deficiency

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

None of these

There is no change in the nuclear charge

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

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

191. 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

192. Nitrolim is

Ca(CN)₂ + C

All

CaCN₂ + C

CaC₂ + C

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

HU

HI

HF

HBr

194. A clathrate may be defined as a

Mixture

Solid solution

Liquid crystal

Cage compound

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

Br

I

Cl

F

196. Halogens exist in the form of

Monoatomic molecules

Cannot be predicted

Various forms

Diatomic molecules

197. 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

Different resistance under different circumstance

Decease in resistance with intensity of light

Decrease in resistance with increase in temperature

198. Which is the strongest acid?

HClO₃

HClO₂

HClO₄

HClO

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

He⁺

Na

H

Li⁺

200. An atom with high electro negativity has

Large size

Low electron affinity

High ionization potential

Low ionization potential

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

Li

Ne

B

F

202. The halogen having highest electron affinity is

Chlorine

Iodine

Bromine

Fluorine

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

Cl₂

H₂

O₂

H₂O

204. 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 are maintained at different temperatures

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

Three layers have different densities

There is special arrangement is cell to keep the layers separate

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

Ordinary (soda lime) glass

Iron from haematite

Phosphorus from phosphorite

Solvay process of sodium carbonate

206. 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

Of easy extraction of Al from it

Bauxite is less impure

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

MO₂

MO

M₂O

M₂O₃

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

III group radicals are precipitated as hydroxides

IV group radicals are precipitated as sulphides

Of the oxidation of H₂S gas by some acid radicals

Sulphur is present in the mixture as impurity

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

Third

Fifth

Sixth

Fourth

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

None of these

With alkali metals

With halogens

With inert gases

211. Calcium is obtained by

Reduction of calcium chloride with carbon

Roasting lime stone

Electrolysis of solution of calcium chloride in water

Electrolysis of molten anhydrous or fused calcium chloride

212. 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

213. P₂O₅ is heated with water to give

Orthophosphoric acid

Phosphorous acid

Hypo phosphoric acid

Hypo phosphorous acid

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

Tetrahedral, acidic

Linear acidic

Angular, disc

Linear, basic

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

Presence of NH₃

Reaction with CO₂

Reaction with NaOH

Reaction with brine solution

216. The halogen that is most easily reduced is

Cl₂

I₂

F₂

Br₂

217. The noble gases consist of

Atoms linked by weak bonds

Diatomic molecules

Single free atoms

Triatomic molecules

218. What is more true about alkali metals?

Both oxidizing and reducing agents

Reducing agents

Oxidizing agents

Hydrolyzing agents

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

High ionization energy

Their ions are isoelectronic with noble gases

Low electronegativity

Low melting point

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

½

5/2

2

1½

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

NaCl

KCl

CuSO₄

BaSO₄

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

NH₃ + H₂CO₃ → NH₄HCO₃

CO₃ + H₂O → H₂CO₃

2NaOH + CO₂ → Na₂CO₃ + H₂O

NaCl + NH₄HCO₃ → NaHCO₃ + NH₄Cl

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

Neon

Radon

Argon

Helium

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

None

Low charge density

Lower electro positivity

Low electronegativity

225. Which one has least dissociation energy?

HI

HCL

HF

HBr

Page 10 of 14

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

400

1000

250

200

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

He

Ar

Ne

Rn

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

Greater hardness of Li

Small size of lithium atom and Li⁺ ion

Hydration of Li⁺ ion

Extremely high electropositivity of Li

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

Gallium and Germanium

Aluminum and silicon

Proton and silicon

Iron and sulphur

230. Calico printing means

Cloth printing

Paper printing

Glass printing

Leather printing

231. Which halogen has application in medicines mostly?

I₂

Cl₂

None

Br2

232. 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

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

K

Ba

Li

Rb

234. Which one of these is most reactive?

Na

Mg

Pb

K

235. Which gives green colour in fireworks?

Potassium

Sodium

Calcium

Barium

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

Br

O

F

U

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

Noble gases have o heat of vapourization

It increases gradually down the group

None of these

It decreases gradually down the group

238. Among noble gases xenon gives compounds due to

Large size

Zero electron affinity

Structure

Higher I-P

239. Cassiterite is an ore of

Sb

Ni

Sn

Mn

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

Astatine

Francium

Polonium

Radium

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

C

Be

Si

Al

242. 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

Expense, but a very uncreative gas

Expensive but easy to store in cylinder

243. Mark the smallest atom

F

Cl

I

Br

244. The type of hybridization of born in diborane is

Sp³d²-hybridisation

Sp-hybridisation

Sp²-hybridisation

Sp³- hybridization

245. XeF₄ on partial hydrolysis produces

XeOF₂

XeF₂

XeOF₄

XeO₃

246. Which of the following is most volatile?

HCl

HF

HBr

HI

247. Identify the incorrect statement with respect to ozone.

Ozone is diamagnetic whereas dioxygen is paramagnetic

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

Ozone is more reactive than dioxygen

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

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

NH₃

Al₂O₃

CO₂

CO

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

Borazole is nonpolar compound

Borazole is electron deficient compound

Of localized electrons in it

Borazole is polar compound

250. The melting point in lowest for

Be

Mg

Ca

Sr

Page 11 of 14

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

Energy dissociation

Hydration energy

High atomic number

Electron affinity

252. Which of the following is correct?

Magnallium is one alloy of Mg and zinc

Sodium reduces CO₂ to carbon

Magnesium reacts with cold water and liberates hydrogen

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

253. Which is valence shell configuration of halogens?

NS₂, nP₄

nS₂, nP₆

ns₂, nP₅

nS₂, nP₃

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

Li⁺

O²¯

B³⁺

F¯

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

Variation is not regular

Remains unchanged

Decreases down the group

Increases down the group

256. AlCl₃ flumes in moist air because

It is covalent

It is very volatile

It is highly hygroscopic

HCl is formed in moist air

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

None

d-orbitals

s-orbitals

p-orbitals

258. Which noble gas is used earth quake prediction?

Ar

Kr

He

Rn

259. Oxygen shows oxidation states

-2

+2, -2

-2, +2, +6

+2, +4, +6

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

Argon

Xenon

Neon

Radon

261. Select the weakest acid among the following

HBr

HI

HF

HCl

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

Cl₂

F₂

Br₂

I₂

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

None of these

Dipole-dipole forces

H. bonding

Strongest vanderwaal’s force

264. Which halogen have most corrosive action on skin?

Chlorine

F₂

Br₂

I₂

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

Copper

Iron

Lead

Sodium

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

Ionization potential

Electron affinity

Heat of hydration

Heat of dissociation

267. Which of the following is true for magnesium?

It is manufactured by electrolysis of aqueous magnesium chloride

It is a strong reducing agent

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

It is more electropositive than sodium

268. 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

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

Halogens

Oxygen family

Nitrogen family

Alkali metals

270. The metal used for making radiation shield is

Zn

Pb

Fe

Al

271. Which is the strongest acid

HCL

HNO3

HCLO4

Cannot be predicted

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

Potassium chlorate

Manganese dioxide

Mercuric oxide

Lead nitrate

273. Which one is hygroscopic in nature?

HUO4

HNO3

HCL

HBr

274. Which is the most volatile compound?

HI

HCl

HF

HBr

275. Which of the halogen has highest electronegativity?

Iodine

Bromine

Fluorine

Chlorine

Page 12 of 14

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

Atomic radius

N/P ratio

Ionization energy

Electro negativity

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

Entropy of solution formation

Hydration energies of cations

Inter – ionic attraction

Lattice energy solids

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

Te

Po

Se

None of these

279. SO3 is not dissolve directly in H2O because

The reaction is quite slow

The reaction does not go to completion

The reaction is highly exothermic

SO₃ is insoluble in H₂O

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

F

Cl

I

Br

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

XeF₄

XeF₃

XeF₆

XeF₂

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

Tetra calcium aluminoferrite

Diclacium silicate

Tri-calcium aluminate

Tri-calcium silicate

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

Boiling point

Atomic radius

Density

Ionization energy

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

Haber

Solvay

Castner

Chamber

285. The one which does not show variable valency is

Lead

Titanium

Copper

Barium

286. The bleaching action of chlorine is due to

Oxidation

Hydrogenation

Reduction

Chlorination

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

Nitrogen trichloride

Nitrosyl chloride

Hyponitrous acid

Phosphorus trichloride

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

High polarisability

Gaseous nature

Weak van der Waals forces between atoms

Inertness

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

Calomel

Borax

Alum

Gypsum

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

Fluorine

Bromine

Chlorine

Iodine

291. Who reported first noble gas?

Ramsay

J.J Thomson

Cavendish

Frank land

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

Sodium thiosulphate

Sodiums sulphates

Sodium persulphate

Sodium sulphides

293. Which halogen is most electropositive?

Br

I

F

Cl

294. 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-2, b-3, c-1, d-4

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

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

295. The alkali metals

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

Form salt like hydrides

296. 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 restricts to oxidation state – 1 only

It is more reactive than other halogens

It has highest first I.E

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

B > N > C > O

O > C > N > B

O > C > B > N

O > B > C > N

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

Small size of fluorine

More electro negativity of fluorine

More electron repulsion in fluorine

Non-metallic nature of fluorine

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

35.45 g

88.60 g

17.72 g

70.90 g

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

XeF₄

HeF₄

CF₄

SF₄

Page 13 of 14

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

11%

22%

33%

44%

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

Chloride ion

Fluoride ion

Sodium ion

Nitride ion

303. 6NaOH + Cl₂ → 5Nacl + Naclo₃ in this reaction chlorine is

Oxidized

No change

Reduced

Both oxidized and reduced

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

To prevent the action of water and salt

Mark the ship lighter

Prevent puncturing by under sea rock

Keep away the sharks

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

F > Br > Cl

Cl > F > Br

Br > Cl > F

F > Cl > Br

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

NaCl

NaF

Nal

NaBr

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

Boiling point

Ionization energy

Atomic radius

Density

308. NaOH is prepared by the method

Down’s cell

Castner Kellner cell

Solvay process

Castner cell

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

They have high electron affinity and ionization energy

All are non-metals

All the halogens react with noble gases to form their halides

All the halogens have electronic configuration ns2P5

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

O₂

O₂-

O₂+

None of these

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

Moisture

Sun light

None of these

Dry air

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

Solvated electrons

Sodium atoms

Sodium amide

Sodium hydride

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

Hypo phosphorous acid

Metaphosphoric acid

Pyro phosphoric acid

Orthophosphoric acid

314. Bond angle is minimum for

H₂Se

H₂Te

H₂S

H₂O

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

U₂>Br₂>I₂>F₂

F₂>Cl₂>Br₂>I2

I₂>F₂>Br₂>U₂

I₂>Br₂>U₂>F₂

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

To increase Al production

To protect the anodes

To act as reducing agent

To make a conducting solution of bauxite

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

Na

Cl₂

O₂

H₂

318. The name of CaSO₄. ½ H₂O is

Dolomite

Epsom salt

Plaster of Paris

Gypsum

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

Sodium amide

Sodium azide

Sodium hydride

Sodium nitride

320. Indicate the correct statement

Alkali metals have ns’ configuring in outermost shells

Alkali metal atom has the smallest size in its period

Alkali metals do not reacts with metals

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

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

It is used as fire proof in textile

It is used in the formation white cement

It is as filter for soap

It is used furniture polish

322. Among the halogens the rare element is

Astatine

Chlorine

Iodine

Fluorine

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

O₂ and He

CO₂ and Ar

O₂ and CO₂

O₂ and Ar

324. Strongest reducing agent is

HCl

HBr

Hl

HF

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

Pb

Fe

Te

Po

Page 14 of 14

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

BaSO₄

BaCO₃

ZnS

MnS

327. Sea weeds are important source of

Bromine

Iodine

Iron

Chlorine

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

Has the largest size

Has the lowest ionization enthalpy

Has the highest heat of vaporization

In the most readily available gas

329. Which of the following phosphorus is most reactive?

Scarlet phosphorus

White phosphorus

Red phosphorus

Violet phosphorus

330. Which one of them is monoatomic?

Fluorine

Oxygen

Nitrogen

Neon

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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