ECAT Chemistry The Halogens and Noble Gases Chapter Test Online

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Chemistry

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

Al₂O₃

CO

NH₃

CO₂

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

None of these

With halogens

With alkali metals

With inert gases

3. The one which does not show variable valency is

Lead

Titanium

Barium

Copper

4. Mark the nitrate which decomposes differently on heating

RbNO₃

NaNO₃

LiNO₃

KNO₃

5. What causes nitrogen to be chemically inert?

High bond energy

Short internuclear distance

Multiple bond formation in the molecule

Absence of bond polarity

6. Which is valence shell configuration of halogens?

nS₂, nP₃

ns₂, nP₅

nS₂, nP₆

NS₂, nP₄

7. In which form boron exist mostly in nature

Nitrides

Oxides

Sulphides

Oxyborates

8. Plaster of Paris is used

As a plaster for walls

As a drying agent

In metallurgical process

In dentistry and surgery

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

Lr

Rn

Fr

Ra

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

Atomic number

Mass number

Isotopic number

Atomic mass

11. Mark the element which shows greatness inert pair effect

Iodine

Fluorine

Bromine

Chlorine

12. Which of the noble gas has highest polarizabilities?

He

Kr

Xe

Ar

13. Which of the following oxides is peroxide?

SO₂

BaO

Na₂O₂

Mn₂O

14. HNO₂ acts as an/a

Oxidizing agent

Reducing agent

All the three

Acid

15. 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 forms RX₂

It is a gas at room temperature

16. The halogen which has only one oxidation state is

F

Cl

I

Br

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

I₂ > Br₂ > Cl₂ > F₂

Br₂ > Cl₂ > F₂ > I₂

F₂ > Cl₂ > Br₂ > I₂

Cl₂ > Br₂ > I₂ > F₂

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

Hydration energy of ion

Electron affinity

High atomic number

Energy dissociation

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

Strongest vanderwaal’s force

H. bonding

None of these

Dipole-dipole forces

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

In form of foil for wrapping

For preparing artificial

As an abrasive in the form of abundum

As an oxidizer in metallurgy

21. Pyrex glass is a mixture of

Sodium silicate and aluminum borosilicate

Sodium silicate and calcium silicate

Sodium silicate and lead silicate

Sodium borosilicate and aluminum borosilicate

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

Chlorine

Bromine

Fluorine

Iodine

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

O > B > C > N

B > N > C > O

O > C > B > N

O > C > N > B

24. Who reported first noble gas?

Cavendish

Ramsay

J.J Thomson

Frank land

25. XeF₄ on partial hydrolysis produces

XeF₂

XeOF₄

XeO₃

XeOF₂

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

Cl

I

Br

F

27. Boron compounds behave as Lewis acid because of their

Acidic nature

Electron deficiency

Ionization property

Covalent nature

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

Zinc

Copper

Iron

Aluminum

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

Lattice energies if solids

Inter ionic attraction

Entropy of solution formation

Hydration energies of cations

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

I₂>Br₂>U₂>F₂

I₂>F₂>Br₂>U₂

U₂>Br₂>I₂>F₂

F₂>Cl₂>Br₂>I2

31. 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 basic character of the oxides

The stability of +2 oxidation state

32. The element that does not form a monoxide is

Silicon

Germanium

Tin

Lead

33. Aluminum (III) chloride forms a dimer because

Al has high ionization energy

It cannot form a trimer

Higher co-ordination can be achieved by Al

Al belongs to third group

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

Na

Mg

Fe

Al

35. The noble gases are

All of these

Diatomic

Monoatomic

Polyatomic

36. Which gives green colour in fireworks?

Barium

Sodium

Calcium

Potassium

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

High atomic number

Hydration energy

Electron affinity

Energy dissociation

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

Reaction with CO₂

Reaction with brine solution

Reaction with NaOH

Presence of NH₃

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

Dinitrogen tetraoxide

Nitrogen dioxide

Nitric oxide

Nitrous oxide

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

Copper

Sodium

Lead

Iron

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

Castner

Solvay

Haber

Chamber

42. The percentage of lead in lead pencil is

20

70

Zero

80

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

He⁺

Na

Li⁺

H

44. Which shows maximum catenation property?

S

Se

Te

O

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

Ne

Ar

He

Xe

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

32

10

8

18

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

It decreases gradually down the group

None of these

Noble gases have o heat of vapourization

It increases gradually down the group

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

Neon

Helium

Argon

Radon

49. Which statement is correct about halogens?

They are all capable of exhibiting several oxidation states

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

50. Hydrochloric acid at 25°C is

Ionic and gas

Ionic and liquid

Covalent and liquid

None of these

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

54

10

2

18

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

KCl

BaSO₄

CuSO₄

NaCl

53. The colour of I₂ in CCI₄ is

Bluish green

Radish brown

Colourless

Violet

54. Deliquescence is a process in which a solid

Absorbs moisture and remain solid

Loses water of crystallization

Increases the water of crystallization

Absorbs moisture and turn into liquid

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

10

16

14

11

56. Hypo is used in photography for

The colour of picture

The fixation of picture

Picture printed

Developing picture

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

Ionic

Coordinate

Metallic

Covalent

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

Sodium hydride

Sodium amide

Sodium atoms

Solvated electrons

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

Chloride ion

Nitride ion

Fluoride ion

Sodium ion

60. Among noble gases xenon gives compounds due to

Large size

Higher I-P

Zero electron affinity

Structure

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

Anhydrous calcium chloride

Phosphorus pentoxidse

Na₃PO₄

Active charcoal

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

88.60 g

70.90 g

17.72 g

35.45 g

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

Magnesium only

Potassium and magnesium

Magnesium and chlorine

Potassium only

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

There is no change in the nuclear charge

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

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

None of these

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

O₂ and Ar

O₂ and CO₂

CO₂ and Ar

O₂ and He

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

F

Tl

Al

Si

67. 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 is more reactive than other halogens

It has highest first I.E

It restricts to oxidation state – 1 only

68. Nitrolim is

CaC₂ + C

Ca(CN)₂ + C

CaCN₂ + C

All

69. Calico printing means

Leather printing

Paper printing

Cloth printing

Glass printing

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

CO₂

O₂

CO

H₂O₂

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

Cs

Rb

Na

K

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

Sodium carbonate

Calcium oxide

Calcium carbonate

Sodium bicarbonate

73. 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 bromide

A nitrate

A sulphate

A carbonate

74. Which of the halogen has highest electronegativity?

Bromine

Iodine

Fluorine

Chlorine

75. 6NaOH + Cl₂ → 5Nacl + Naclo₃ in this reaction chlorine is

No change

Oxidized

Both oxidized and reduced

Reduced

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76. 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

1000

250

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

Magnesium ammonium phosphate

Ferrous ammonium sulphate

Calcium sulphates

Magnesium sulphates

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

MnS

BaSO₄

ZnS

BaCO₃

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

Hyponitrous acid

Phosphorus trichloride

Nitrosyl chloride

Nitrogen trichloride

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

12

7

14

16

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

HBr

HCl

HF

Hl

82. The important ore of lead is

Bauxite

Chalcopyrites

Haematite

Galena

83. Which of the following phosphorus is most reactive?

Red phosphorus

White phosphorus

Violet phosphorus

Scarlet phosphorus

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

F₂

Br₂

I₂

Cl₂

85. Which of the following has highest dipole moment?

SbH₃

PH₃

AsH₃

NH₃

86. Cl₂O₇ is best prepared by passing by

Chlorine and oxygen over hot silver chlorate

Hydrogen chloride over phosphorus pentoxide

Chlorine gas over hot HgO

Perchloric acid (CHIO₄) over hot silver oxide

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

Lead nitrate

Potassium chlorate

Manganese dioxide

Mercuric oxide

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

Paramagnetic

Ferromagnetic

Diamagnetic

Antiferromagnetic

89. I₂ is solid at room temperature because

It is highly electronegative

It possess hydrogen bonding

It has metallic bond

Its molecule has a large size

90. Which of the following is an inert gas?

H₂

N₂

O₂

Argon

91. 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

92. Which of the following is not isoelectronic?

Mg²⁺

Na⁺

O²¯

Cl¯

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

½

5/2

2

1½

94. Sulphuric acid has great affinity for water because

It decomposes the acid

Acid forms hydrates with water

It hydrolyses the acid

Acid decomposes water

95. Which is the most volatile compound?

HCl

HI

HF

HBr

96. Vander Waals forces are stronger in

F₂

I₂

Br₂

Cl₂

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

K⁺

Ca²⁺

S²¯

Cl¯

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

10

20

30

40

99. Neon glows in discharge tube as

Yellowish

Radish

Greenish

Bluish

100. Which is the strongest acid?

HClO₂

HClO₃

HClO₄

HClO

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

Expensive but easy to store in cylinder

Less dense then air and not flammable

Expense, but a very uncreative gas

Lighter than air and cheap to produce

102. Which halogen have most corrosive action on skin?

I₂

Br₂

F₂

Chlorine

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

Li

C

N

P

104. 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

Abrupt change of properties

Marked change of properties

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

Mixture of xenon and nitrogen

Mixture of helium and oxygen

Mixture of argon and oxygen

Mixture of neon and oxygen

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

Li⁺

O²¯

B³⁺

F¯

107. Alkaline earth metals comes under

Representative elements

Inner transition elements

Halogens

Transition elements

108. Which of the following is most electronegative?

Silicon

Lead

Carbon

Tin

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

Solvated electrons

Sodium amide

Sodium atoms

Sodium hydride

110. Oxygen shows oxidation states

-2

+2, -2

-2, +2, +6

+2, +4, +6

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

Non-metallic nature of fluorine

Small size of fluorine

More electro negativity of fluorine

More electron repulsion in fluorine

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

It is more reactive than other halogens

It has highest electronegativity

It restricts to oxidation state – 1 only

It has highest first ionization energy

113. 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

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

Leads to the dissolution of beryllium metal

Have no effect

Precipitate Mg metal

Precipitate Mg

115. P₂O₅ is heated with water to give

Hypo phosphoric acid

Orthophosphoric acid

Phosphorous acid

Hypo phosphorous acid

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

Diamond

Graphite

Coal

Coke

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

Mg

Ba

Sr

Ca

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

Variable trend

Highly soluble in water

Insoluble in water

Less soluble in water

119. Mark the correct statement

Carbonates of Na, K, NH₄ are soluble in water

Li₂CO₃ is soluble in water

Carbonates of Ca, Ba, Sr are soluble in water

Basic carbonates of Mg and Cu are soluble in water

120. The halogen having highest electron affinity is

Chlorine

Iodine

Fluorine

Bromine

121. The substance not likely to contain CaCO₃ is

Dolomite

A marble states

Sea shells

Calcried gypsum

122. The ionization potential is lowest for the

Inert gases

Alkaline earth metals

Alkali metals

Halogens

123. Strongest reducing agent is

HF

HBr

HCl

Hl

124. Polyanion formation is maximum in

Nitrogen

Sulphur

Oxygen

Boron

125. Identify the correct statement

Elemental Na is easily oxidized

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

Elemental Na is insoluble in NH₃

Elemental Na is a strong oxidizing agent

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126. An atom with high electro negativity has

Low electron affinity

Low ionization potential

Large size

High ionization potential

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

N

Li

Zn

He

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

Calcium oxide

Oxygen

Chlorine

Hypochlorous acid

129. 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

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

Cl

I

S

F

131. The noble gas He was discovered by

Chadwick

Rutherford

Dorn

Frank land and Lockyer

132. 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-4, b-1, c-3, d-2

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

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

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

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

Chromyl chloride

Chromic chloride

None

Chromous chloride

134. Mark the incorrect statement about ‘Li’

‘Li’ has a great tendency to form hydrates

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

‘Li’ is not effected by air

‘Li’ combine with nitrogen directly to form Lithium nitride

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

Phosphorus

Mercury

Copper

Magnesium

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

None

Low charge density

Low electronegativity

Lower electro positivity

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

Al

Be

Si

C

138. Which one has least dissociation energy?

HBr

HCL

HI

HF

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

Iodine solution

NaCl

Chlorine

Ki

140. 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

Prevent puncturing by under sea rock

Mark the ship lighter

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

F > Br > Cl

F > Cl > Br

Br > Cl > F

Cl > F > Br

142. Identify the correct statement

Plaster of Paris is obtained by partial oxidation of gypsum

Plaster of Pairs can be 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

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

To protect the anodes

To act as reducing agent

To increase Al production

To make a conducting solution of bauxite

144. A clathrate may be defined as a

Solid solution

Liquid crystal

Cage compound

Mixture

145. Which of the following is most electronegative?

Si

Pb

Sn

C

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

Fluorine atom is smaller in size

HF is the weakest acid

HF molecules form intermolecular H-bonds

Fluorine is highly reactive

147. Which is the strongest acid

Cannot be predicted

HCL

HCLO4

HNO3

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

HCl

H₂S

HBR

SO₂

149. Which halogen has application in medicines mostly?

Cl₂

None

I₂

Br2

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

U

Br

F

O

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

Francium

Radium

Astatine

Polonium

152. Bromine is obtained on a commercial scale from

Cryolite

Caliche

Common salt

Carnallite

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

2,8

2,8,7

2,8,18,2

2,8,2

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

Fe

Pb

Si

S

155. Which one has highest electron affinity?

I

Br

F

Cl

156. 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

157. Cassiterite is an ore of

Sb

Mn

Ni

Sn

158. What is more true about alkali metals?

Hydrolyzing agents

Reducing agents

Oxidizing agents

Both oxidizing and reducing agents

159. Halogens exist in the form of

Monoatomic molecules

Diatomic molecules

Cannot be predicted

Various forms

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

Pyro phosphoric acid

Metaphosphoric acid

Orthophosphoric acid

Hypo phosphorous acid

161. Sea weeds are important source of

Iodine

Iron

Chlorine

Bromine

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

Weak reducing agents

Weak oxidizing agents

Strong reducing agents

Strong oxidizing agents

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

Their ionization potential is less than that of other elements

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

They contain only one electron in their outermost shell

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

M₂O₃

M₂O

MO₂

MO

165. Heavy water is obtained by

Removing impurities of calcium and magnesium form water

Prolonged electrolysis of water

Simple distillation of water

Dissolving heavy salt in water

166. NaOH is prepared by the method

Castner cell

Down’s cell

Castner Kellner cell

Solvay process

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

Sodium amide

Sodium nitride

Sodium azide

Sodium hydride

168. Which one of them is monoatomic?

Oxygen

Fluorine

Nitrogen

Neon

169. AlCl₃ flumes in moist air because

It is highly hygroscopic

It is very volatile

HCl is formed in moist air

It is covalent

170. Electron affinity depends on

Atomic number

Nuclear charge

Atomic size and nuclear charge both

Atomic size

171. Among the halogens the rare element is

Chlorine

Astatine

Iodine

Fluorine

172. The melting point in lowest for

Be

Ca

Sr

Mg

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

Na, Cl

Na, Ca

Ca, Cl

Cl, Br

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

Chlorophyll

Florigen

Haemoglobin

ATP

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

Al⁺

Ne

Li⁺

Mg⁺

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

Cl

I

F

Br

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

Fifth

Fourth

Sixth

Third

178. 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

Sulphur is present in the mixture as impurity

Of the oxidation of H₂S gas by some acid radicals

III group radicals are precipitated as hydroxides

179. NaoH is named as caustic soda because

It reacts with chlorine gas

It corrodes the organic tissues

It reacts with fats to form soap

It is used in soda water

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

Ne

Li

B

F

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

Of localized electrons in it

Borazole is polar compound

Borazole is electron deficient compound

Borazole is nonpolar compound

182. Calcium is obtained by

Reduction of calcium chloride with carbon

Electrolysis of solution of calcium chloride in water

Electrolysis of molten anhydrous or fused calcium chloride

Roasting lime stone

183. The noble gases consist of

Single free atoms

Atoms linked by weak bonds

Diatomic molecules

Triatomic molecules

184. The last orbit of argon would have electrons

2

18

6

8

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

Electro negativity

Melting point

Ionic radius

First ionization energy

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

Strong acid and weak base

Weak acid and strong base

Strong acid and strong base

Weak acid and weak base

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

Radon

Argon

Neon

Xenon

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

Atomic radius

Boiling point

Density

Ionization energy

189. Which statement is correct?

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

None of these

Noble gases will all burn in pure oxygen

Noble gases are all dense gases

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

Decease in resistance with intensity of light

Increase in resistance with increase in temperature

Decrease in resistance with increase in temperature

Different resistance under different circumstance

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

All are non-metals

All the halogens have electronic configuration ns2P5

All the halogens react with noble gases to form their halides

They have high electron affinity and ionization energy

192. Variable valency is characteristic of

Transition elements

Noble gas

Alkali metals

Halogen

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

Gypsum

Alum

Calomel

Borax

194. All halogen are

Reducing agents

Oxidizing agents

Drying agents

Oxidizing as well as reducing agents

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

Nuclear masses

Nuclear neutron-proton number rations

Atomic masses

Atomic numbers

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

Developing interlocking needle like crystals of hydrated silicates

Hydrating sand and gravel mixed with cement

Converting sand into silici acid

Keeping it cool

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

Heat of hydration

Ionization potential

Heat of dissociation

Electron affinity

198. Crystalline form of sulphur stale at room temperature is

Prismatic sulphur

Plastic sulphur

Monoclinic sulphur

Rhombic sulphur

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

Sodiums sulphates

Sodium thiosulphate

Sodium persulphate

Sodium sulphides

200. All the elements of oxygen family are

Polymorphic

Radioactive

Metalloids

Non-metals

Page 9 of 14

201. 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?

CaO

SnO₂

CO₂

SiO₂

202. The name of CaSO₄. ½ H₂O is

Plaster of Paris

Dolomite

Gypsum

Epsom salt

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

Silica

Magnesia

Iron oxide

Alumina

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

Small ionic size of Li⁺

High covalent nature

Low ∆H lattice

High ∆H lattice

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

In the atmosphere

In sea

In lakes

As salts in ponds

206. Mark the correct statement

None of these

Cl₂ is more insoluble in water

Br is more reactive than Cl₂

Iodine is a solid

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

Cs

Cr

Ba

Cu

208. Sulphuric acid reacts with PCl₅ to give

Sulphur monochloride

Thionyl chloride

Sulphur tetrachloride

Sulphuryl chloride

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

Weak van der Waals forces between atoms

Inertness

High polarisability

Gaseous nature

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

Cl₂

Na

O₂

H₂

211. 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

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

F

I

Cl

Br

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

Boiling point

Atomic radius

Ionization energy

Density

214. SO3 is not dissolve directly in H2O because

SO₃ is insoluble in H₂O

The reaction is quite slow

The reaction does not go to completion

The reaction is highly exothermic

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

CaO

Ca and CO₂

CaC₂

CaCO₃

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

Three layers have different densities

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

There is special arrangement is cell to keep the layers separate

Three layers are maintained at different temperatures

217. 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

Greater amount of nitrogen molecules derived from N¹⁵ isotope

Some nitrogen molecules analogous to O₂

CO₂

218. Which one of these is most reactive?

Mg

Na

K

Pb

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

Neon

Krypton

Argon

Helium

220. The following has zero valency

Na

Be

Al

Kr

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

CF₄

SF₄

HeF₄

XeF₄

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

Nitrogen is highly soluble in water

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

223. Mark the smallest atom

F

Cl

Br

I

224. The alkali metals

Form salts which are predominantly covalent

Show increasing electro negativity from Li to Cs.

Form salt like hydrides

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

225. The correct formula of Plaster of Paris is

CaSO₄. 3H₂O

CaSO₄

CaSO₄. 1/2H₂O

CaSO₄.2H₂O

Page 10 of 14

226. 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

10mL

Zero

800 mL

200mL

227. 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

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

33%

11%

44%

22%

229. The structure of XeF₆

None of these

Distorted octahedral

Tetrahedral

Pyramidal

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

Fluorine does not form oxoacid

Fluorine cannot be prepared by electrolysis of fused metal fluorides

Bond energy of fluorine is less than that of chlorine

Electron affinity of chlorine is greater than that of fluorine

231. The acid which has a peroxy linkage is

Dithionic acid

Carlo’s acid

Pyrosulphuric acid

Sulphurous acid

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

O₂

O₂+

None of these

O₂-

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

Hydration energy

Lattice energy

Ionization energy

Electron affinity

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

F

Cl

I

Br

235. The halogen that is most easily reduced is

F₂

Cl₂

I₂

Br₂

236. The most acidic of the following compounds is

B₂O₃

Sb₂O₃

P₂O₃

As₂O₃

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

Low electronegativity

Their ions are isoelectronic with noble gases

Low melting point

High ionization energy

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

CO₃ + H₂O → H₂CO₃

2NaOH + CO₂ → Na₂CO₃ + H₂O

NH₃ + H₂CO₃ → NH₄HCO₃

NaCl + NH₄HCO₃ → NaHCO₃ + NH₄Cl

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

Cl₂

O₂

H₂O

H₂

240. Permonosulphuric acid is known as

Carlo’s acid

Marshall’s acid

None of these

Sulphuric acid

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

NaF

Nal

NaBr

NaCl

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

K⁺

OH¯

O³¯

O₂¯²

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

Diclacium silicate

Tri-calcium aluminate

Tetra calcium aluminoferrite

Tri-calcium silicate

244. 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 formed in the upper atmosphere by a photochemical reaction involving dioxygen

Ozone is diamagnetic whereas dioxygen is paramagnetic

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

Francium

Radium

Astatine

Polonium

246. Which one halogen is radioactive?

Iodine

Astatine

Chlorine

Bromine

247. Freon-12 is used as a

Fungicide

Refrigerant

Herbicide

Insecticide

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

Rn

Ar

Ne

He

249. White enamel of our teeth is

CaBr₂

Ca₃(PO₄)₂

CaF₂

CaCl₂

250. The shape of gaseous SnCl₂ is

Tetrahedral

Linear

Angular

t-shaped

Page 11 of 14

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

Highest boiling points

Lower ionization energies

Greater hardness

Smaller ionic radii

252. Indicate the correct statement

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

Alkali metal atom has the smallest size in its period

Alkali metals do not reacts with metals

Alkali metals have ns’ configuring in outermost shells

253. Which noble gas is used in labors?

Krypton

Helium

Neon

Argon

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

Iodine

Bromine

Fluorine

Chlorine

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

Oxygen family

Halogens

Alkali metals

Nitrogen family

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

Pb

Te

Fe

Po

257. The type of hybridization of born in diborane is

Sp-hybridisation

Sp³d²-hybridisation

Sp²-hybridisation

Sp³- hybridization

258. Which one is the weakest oxyacid of chlorine?

HCIO₂

HCIO₄

HCIO₃

HCIO

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

Free molecules

Free ions

Free electrons

Atoms of sodium and chlorine

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

Heavy metals

Halogens

Light metals

Noble gases

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

Flint glass

Soda glass

Borosilicate glass

Crooke’s glass

262. 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 in the formation white cement

It is used as fire proof in textile

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

P

As

O

Si

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

Cl

I

F

Br

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

Greater hardness of Li

Extremely high electropositivity of Li

Hydration of Li⁺ ion

Small size of lithium atom and Li⁺ ion

266. The metal used for making radiation shield is

Al

Pb

Fe

Zn

267. Select the weakest acid among the following

HI

HCl

HBr

HF

268. Which of the following has greatest reducing power?

HI

HCl

HBr

HI

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

Variation is not regular

Remains unchanged

Increases down the group

Decreases down the group

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

B

D

C

A

271. Alkali metals are generally extracted by

Electrolytic methods

Reduction methods

Displacement methods

Double decomposition methods

272. Mark the compound which does not exist

NCl₅

SbCl₅

AsF₅

PF₅

273. Fluorine differs from other halogens due to

All

High dissociation energy

Low first ionization energy

Small size

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

Magnesium

Iron

Cobalt

Chromium

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

Metallic properties

Strongly bond valence electrons

Small ionic size

Large atomic size

Page 12 of 14

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

O₂

He

H₂

Ar

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

Angular, disc

Linear acidic

Linear, basic

Tetrahedral, acidic

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

Both have nearly the same size

Both have similar electronic configurations

The ratio of their charge to size is nearly the same

Both are found together in nature

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

Kr

Rn

Ar

Xe

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

Cl

Li

Mg

Rb

281. Common oxidation state of boron are

+1

+3,-3

+3

-3

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

p-orbitals

None

d-orbitals

s-orbitals

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

Mg > Na > Al > Si

Na > Mg > Al > Si

Al > Mg > Na > Si

Si > Mg > Al > Na

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

P > Si

C > N

Br > Cl

Sr > Ca

285. The most powerful oxidizing agent among the halogens is

I₂

F₂

Br₂

Cl₂

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

Aluminum and silicon

Iron and sulphur

Proton and silicon

Gallium and Germanium

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

Ordinary (soda lime) glass

Phosphorus from phosphorite

Iron from haematite

Solvay process of sodium carbonate

288. Which one is the biggest ion?

Na⁺

Mg²⁺

Al³⁺

Ba²⁺

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

Half-life of Rn is only 3-8 days

Ne is obtained during radioactive disintegration

HE is used in producing very low temperatures

Ar is used in electric bulbs

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

Chlorine

Fluorine

Bromine

Iodine

291. Number of elements present in 5th period is

24

18

32

8

292. The noble gas forming the maximum number of compounds

Ar

Xe

Ne

He

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

Cl₂

I₂

F₂

Br₂

294. Electropositive character increase down the group due to

Decrease in electronegativity of the elements

Increase in atomic size of elements

Decrease in I.P

All of these

295. Which one boric acid is stable one?

H₃BO₃

HBO₃

None of these

H₂B₄O₇

296. 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

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

It cannot act as a bleaching agent

It oxidizes potassium iodide

It oxidizes lead sulphides

It oxidizes mercury

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

37, 19, 3, 55

1, 12, 30, 4, 62

9, 17, 35, 53

12, 20, 56, 88

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

Nitrogen

Oxygen

Helium

Neon

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

Atomic radius

Electro negativity

N/P ratio

Ionization energy

Page 13 of 14

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

Lose 3 electrons

Lose 2 electrons

Gain 3 electrons

Gain 2 electrons

302. Which gas can support combustion?

N₂O

CO₂

CO

N₂

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

Al₂(OH)₄

Na₂Al(OH)₄

NaAlO₂

Na₃AlO₃

304. The bleaching action of chlorine is due to

Reduction

Oxidation

Chlorination

Hydrogenation

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

Carbon

Nitrogen

Boron

Oxygen

306. Electron affinity of sulphur is

Less than O but more than SE

More than O but less than Se

More than O and Se

Equal to O and Se

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

Iodine

Chlorine

Bromine

Fluorine

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

Bauxite is less impure

Of easy extraction of Al from it

Bauxite is available in large quantity

Bauxite contains maximum of Al

309. Bond angle is minimum for

H₂Te

H₂S

H₂Se

H₂O

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

It absorbs moisture

It changes into CaCl₂ and Ca(OH)₂

It changes into calcium chloride and calcium chlorate

It change into calcium hypochlorate

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

Sulphur dioxide

Chlorine

Carbon dioxide

Iodide

312. The most abundant inert gas in the atmosphere is

Kr

He

Ar

Ne

313. Which halogen is most electropositive?

Cl

Br

I

F

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

Sun light

None of these

Moisture

Dry air

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

HI

HBr

HCl

HF

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

None of these

Se

Te

Po

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

HU

HI

HF

HBr

318. Which of the following is acidic?

BeO

N₂O

HgO

SO₃

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

XeF₂

XeF₄

XeF₆

XeF₃

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

Strontium

Barium

Calcium

Beryllium

321. Which of the following statements is incorrect?

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

Sodium is the most abundant metallic element in sea water

Melting and boiling points of alkali metals decrease down the group

Ionic character of alkali metal halides decreases down the group

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

K

Ba

Rb

Li

323. Which one is hygroscopic in nature?

HNO3

HUO4

HCL

HBr

324. Orthophosphoric acid is

Monobasic

Tetrabasic

Dibasic

Tribasic

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

Sodium

Zinc

Lead

Silver

Page 14 of 14

326. Which of the following is most volatile?

HCl

HI

HBr

HF

327. Which noble gas is used earth quake prediction?

Rn

He

Kr

Ar

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

In the most readily available gas

Has the largest size

Has the highest heat of vaporization

Has the lowest ionization enthalpy

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

Preventing overdeveloping and fogging

Dissolving out unreacted silver bromide

Converting silver halides to metallic silver

Reducing solubility of AgBr

330. XeF₄ involves which hybridization

Sp²d

Sp²

Sp³d²

Sp

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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