ECAT Chemistry The Halogens and Noble Gases Chapter Test Online

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Chemistry

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

Hydration energy

Ionization energy

Lattice energy

Electron affinity

2. Which of the following oxides is peroxide?

Mn₂O

BaO

Na₂O₂

SO₂

3. 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

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

Chlorine

NaCl

Iodine solution

Ki

5. Hypo is used in photography for

Picture printed

The fixation of picture

Developing picture

The colour of picture

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

A

C

B

D

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

None

s-orbitals

d-orbitals

p-orbitals

8. 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

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

Atomic number

Mass number

Atomic mass

Isotopic number

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

Electron affinity

High atomic number

Hydration energy of ion

Energy dissociation

11. Which one of them is monoatomic?

Nitrogen

Neon

Oxygen

Fluorine

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

Keeping it cool

Converting sand into silici acid

Developing interlocking needle like crystals of hydrated silicates

Hydrating sand and gravel mixed with cement

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

It changes into CaCl₂ and Ca(OH)₂

It absorbs moisture

It change into calcium hypochlorate

It changes into calcium chloride and calcium chlorate

14. Which of the halogen has highest electronegativity?

Iodine

Chlorine

Bromine

Fluorine

15. 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

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

O²¯

F¯

Li⁺

B³⁺

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

Magnesium

Cobalt

Chromium

Iron

18. Which of the following phosphorus is most reactive?

Scarlet phosphorus

Violet phosphorus

Red phosphorus

White phosphorus

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

F

Cl

Br

I

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

Al

Fe

Na

Mg

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

Potassium chlorate

Lead nitrate

Mercuric oxide

Manganese dioxide

22. 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

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

Fluorine

Iodine

Bromine

Chlorine

24. Which one has least dissociation energy?

HF

HI

HCL

HBr

25. Variable valency is characteristic of

Transition elements

Alkali metals

Noble gas

Halogen

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26. Which one has highest electron affinity?

Br

Cl

F

I

27. Identify the correct statement

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

Elemental Na is easily oxidized

28. 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

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

Carbon

Nitrogen

Boron

Oxygen

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

High ionization energy

Low melting point

Low electronegativity

Their ions are isoelectronic with noble gases

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

HBr

HI

HU

HF

32. Alkaline earth metals comes under

Representative elements

Transition elements

Halogens

Inner transition elements

33. Which one boric acid is stable one?

None of these

H₂B₄O₇

H₃BO₃

HBO₃

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

Reducing solubility of AgBr

Dissolving out unreacted silver bromide

Converting silver halides to metallic silver

Preventing overdeveloping and fogging

35. Boron compounds behave as Lewis acid because of their

Covalent nature

Acidic nature

Electron deficiency

Ionization property

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

I₂

Cl₂

Br₂

F₂

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

Chlorine

Fluorine

Bromine

Iodine

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

Gain 2 electrons

Lose 3 electrons

Gain 3 electrons

Lose 2 electrons

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

F

Tl

Al

Si

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

NH₃ + H₂CO₃ → NH₄HCO₃

NaCl + NH₄HCO₃ → NaHCO₃ + NH₄Cl

2NaOH + CO₂ → Na₂CO₃ + H₂O

CO₃ + H₂O → H₂CO₃

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

K⁺

Cl¯

Ca²⁺

S²¯

42. 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 has highest E.N

It has highest first I.E

It restricts to oxidation state – 1 only

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

Ne

Mg⁺

Li⁺

Al⁺

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

30

20

40

10

45. The substance not likely to contain CaCO₃ is

Sea shells

Calcried gypsum

Dolomite

A marble states

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

Al₂O₃

CO

CO₂

NH₃

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

O > B > C > N

O > C > N > B

B > N > C > O

O > C > B > N

48. Heavy water is obtained by

Removing impurities of calcium and magnesium form water

Dissolving heavy salt in water

Prolonged electrolysis of water

Simple distillation of water

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

Ba

Rb

K

Li

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

It is as filter for soap

It is used as fire proof in textile

It is used in the formation white cement

It is used furniture polish

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51. Which noble gas is used earth quake prediction?

He

Ar

Rn

Kr

52. Hydrochloric acid at 25°C is

Ionic and liquid

Covalent and liquid

Ionic and gas

None of these

53. The noble gases are

Monoatomic

Polyatomic

All of these

Diatomic

54. Fluorine differs from other halogens due to

Low first ionization energy

All

Small size

High dissociation energy

55. The alkali metals

Show increasing electro negativity from Li to Cs.

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

Form salts which are predominantly covalent

Form salt like hydrides

56. Which of the noble gas has highest polarizabilities?

Kr

Ar

Xe

He

57. Which gas can support combustion?

N₂O

N₂

CO₂

CO

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

Entropy of solution formation

Inter ionic attraction

Hydration energies of cations

Lattice energies if solids

59. The halogen that is most easily reduced is

F₂

Cl₂

Br₂

I₂

60. Alkali metals are generally extracted by

Double decomposition methods

Reduction methods

Electrolytic methods

Displacement methods

61. The element that does not form a monoxide is

Silicon

Tin

Lead

Germanium

62. Electropositive character increase down the group due to

Decrease in electronegativity of the elements

All of these

Decrease in I.P

Increase in atomic size of elements

63. Identify the correct statement

Gypsum is obtained by heating plaster of pairs

Gypsum contains a lower percentage of calcium than plaster of pairs

Plaster of Pairs can be obtained by partial oxidation of gypsum

Plaster of Paris is obtained by partial oxidation of gypsum

64. 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

65. 6NaOH + Cl₂ → 5Nacl + Naclo₃ in this reaction chlorine is

Reduced

Both oxidized and reduced

Oxidized

No change

66. The percentage of lead in lead pencil is

70

80

Zero

20

67. Cl₂O₇ is best prepared by passing by

Chlorine gas over hot HgO

Chlorine and oxygen over hot silver chlorate

Hydrogen chloride over phosphorus pentoxide

Perchloric acid (CHIO₄) over hot silver oxide

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

Alum

Borax

Calomel

Gypsum

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

Graphite

Diamond

Coal

Coke

70. Which halogen has application in medicines mostly?

Cl₂

I₂

Br2

None

71. Which of the following has greatest reducing power?

HCl

HBr

HI

72. Mark the element which shows greatness inert pair effect

Iodine

Chlorine

Fluorine

Bromine

73. Which of the following is most electronegative?

Silicon

Tin

Carbon

Lead

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

Moisture

Dry air

Sun light

None of these

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

2,8,7

2,8,2

2,8,18,2

2,8

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

½

1½

2

5/2

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

Chlorophyll

Florigen

Haemoglobin

ATP

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

Inter – ionic attraction

Entropy of solution formation

Hydration energies of cations

Lattice energy solids

79. 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

80. Cassiterite is an ore of

Sb

Ni

Mn

Sn

81. The halogen having highest electron affinity is

Fluorine

Chlorine

Iodine

Bromine

82. Select the weakest acid among the following

HCl

HBr

HI

HF

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

They have high electron affinity and ionization energy

All the halogens have electronic configuration ns2P5

All are non-metals

All the halogens react with noble gases to form their halides

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

Three layers have different densities

Three layers are maintained at different temperatures

There is special arrangement is cell to keep the layers separate

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

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

Dipole-dipole forces

Strongest vanderwaal’s force

H. bonding

None of these

86. The shape of gaseous SnCl₂ is

t-shaped

Tetrahedral

Linear

Angular

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

CaO

CaCO₃

Ca and CO₂

CaC₂

88. The colour of I₂ in CCI₄ is

Violet

Colourless

Bluish green

Radish brown

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

He⁺

Na

Li⁺

H

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

Low ∆H lattice

High ∆H lattice

High covalent nature

Small ionic size of Li⁺

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

Fe

Pb

Te

Po

92. The most powerful oxidizing agent among the halogens is

Br₂

I₂

F₂

Cl₂

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

P > Si

Br > Cl

Sr > Ca

C > N

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

Neon

Nitrogen

Oxygen

Helium

95. Permonosulphuric acid is known as

Carlo’s acid

None of these

Marshall’s acid

Sulphuric acid

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

Te

None of these

Se

Po

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

Metallic

Covalent

Ionic

Coordinate

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

Oxygen family

Alkali metals

Halogens

Nitrogen family

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

O

U

Br

F

100. Which is the most volatile compound?

HBr

HCl

HI

HF

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101. Which one is hygroscopic in nature?

HBr

HUO4

HCL

HNO3

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

As salts in ponds

In sea

In the atmosphere

In lakes

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

Both a and b

The hydration energy of Na₂SO₄ is more than its lattice energy

The lattice energy of BaSO₄ is more than its hydration energy

The lattice energy has no role to play in solubility

104. 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

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

As an abrasive in the form of abundum

As an oxidizer in metallurgy

In form of foil for wrapping

For preparing artificial

106. Which of the following statements is incorrect?

Sodium is the most abundant metallic element in sea water

Ionic character of alkali metal halides decreases down the group

Melting and boiling points of alkali metals decrease down the group

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

107. AlCl₃ flumes in moist air because

It is covalent

HCl is formed in moist air

It is highly hygroscopic

It is very volatile

108. Which of the following is correct?

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

Sodium reduces CO₂ to carbon

Magnallium is one alloy of Mg and zinc

Magnesium reacts with cold water and liberates hydrogen

109. Which is the strongest acid?

HClO

HClO₂

HClO₄

HClO₃

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

Nal

NaBr

NaF

NaCl

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

Ca, Cl

Cl, Br

Na, Ca

Na, Cl

112. Pyrex glass is a mixture of

Sodium silicate and calcium silicate

Sodium silicate and aluminum borosilicate

Sodium borosilicate and aluminum borosilicate

Sodium silicate and lead silicate

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

XeF₆

XeF₃

XeF₄

XeF₂

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

O₂ and Ar

CO₂ and Ar

O₂ and He

O₂ and CO₂

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

Br

I

F

Cl

116. Which statement is correct about halogens?

They are all diatomic and form univalent ions

They are all capable of exhibiting several oxidation states

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

They are all diatomic and form divalent ions

117. The noble gas forming the maximum number of compounds

Ne

He

Xe

Ar

118. The name of CaSO₄. ½ H₂O is

Plaster of Paris

Dolomite

Gypsum

Epsom salt

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

Radon

Neon

Helium

Argon

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

7

12

16

14

121. Mark the correct statement

Li₂CO₃ is soluble in water

Carbonates of Na, K, NH₄ are soluble in water

Carbonates of Ca, Ba, Sr are soluble in water

Basic carbonates of Mg and Cu are soluble in water

122. An atom with high electro negativity has

Low electron affinity

High ionization potential

Low ionization potential

Large size

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

Diclacium silicate

Tri-calcium aluminate

Tri-calcium silicate

Tetra calcium aluminoferrite

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

Beryllium

Barium

Calcium

Strontium

125. Which gives green colour in fireworks?

Sodium

Barium

Potassium

Calcium

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126. Vander Waals forces are stronger in

Cl₂

Br₂

I₂

F₂

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

Sodium persulphate

Sodiums sulphates

Sodium thiosulphate

Sodium sulphides

128. The following has zero valency

Kr

Be

Al

Na

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

O₂

H₂O₂

CO

CO₂

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

Cl

Rb

Li

Mg

131. What causes nitrogen to be chemically inert?

Absence of bond polarity

High bond energy

Short internuclear distance

Multiple bond formation in the molecule

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

Ne

Rn

Ar

He

133. 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

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

F

B

Ne

Li

135. Which of the following is true for magnesium?

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

It is more electropositive than sodium

It is a strong reducing agent

It is manufactured by electrolysis of aqueous magnesium chloride

136. What is more true about alkali metals?

Reducing agents

Both oxidizing and reducing agents

Oxidizing agents

Hydrolyzing agents

137. White enamel of our teeth is

Ca₃(PO₄)₂

CaF₂

CaBr₂

CaCl₂

138. Which shows maximum catenation property?

Se

S

O

Te

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

Orthophosphoric acid

Pyro phosphoric acid

Hypo phosphorous acid

Metaphosphoric acid

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

O₂

H₂

Na

Cl₂

141. 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

Ne is obtained during radioactive disintegration

Half-life of Rn is only 3-8 days

142. Which noble gas is used in labors?

Helium

Argon

Krypton

Neon

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

Iron and sulphur

Aluminum and silicon

Gallium and Germanium

Proton and silicon

144. Sulphuric acid has great affinity for water because

Acid forms hydrates with water

It decomposes the acid

Acid decomposes water

It hydrolyses the acid

145. The correct formula of Plaster of Paris is

CaSO₄. 1/2H₂O

CaSO₄.2H₂O

CaSO₄. 3H₂O

CaSO₄

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

O₂

H₂O

Cl₂

H₂

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

Zn

N

Li

He

148. Mark the compound which does not exist

SbCl₅

PF₅

NCl₅

AsF₅

149. Sulphuric acid reacts with PCl₅ to give

Sulphuryl chloride

Sulphur monochloride

Thionyl chloride

Sulphur tetrachloride

150. Calcium is obtained by

Electrolysis of solution of calcium chloride in water

Electrolysis of molten anhydrous or fused calcium chloride

Reduction of calcium chloride with carbon

Roasting lime stone

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

Aluminum

Copper

Zinc

Iron

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

14

10

11

16

153. Mark the correct statement

Cl₂ is more insoluble in water

Iodine is a solid

None of these

Br is more reactive than Cl₂

154. Electron affinity of sulphur is

More than O and Se

Equal to O and Se

Less than O but more than SE

More than O but less than Se

155. Orthophosphoric acid is

Tetrabasic

Dibasic

Tribasic

Monobasic

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

Halogens

Light metals

Noble gases

Heavy metals

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

HBr

HF

Hl

HCl

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

44%

22%

33%

11%

159. Which of the following is acidic?

SO₃

BeO

N₂O

HgO

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

Metallic properties

Strongly bond valence electrons

Large atomic size

Small ionic size

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

They contain only one electron in their outermost shell

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

Their ionization potential is less than that of other elements

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

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

Ba

Mg

Ca

Sr

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

F

Br

I

Cl

164. Which one is the biggest ion?

Al³⁺

Mg²⁺

Ba²⁺

Na⁺

165. The most abundant inert gas in the atmosphere is

He

Ar

Kr

Ne

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

Sodium

Copper

Iron

Lead

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

Solvated electrons

Sodium atoms

Sodium amide

Sodium hydride

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

Of easy extraction of Al from it

Bauxite is less impure

Bauxite contains maximum of Al

Bauxite is available in large quantity

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

Helium

Neon

Krypton

Argon

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

Chloride ion

Fluoride ion

Sodium ion

Nitride ion

171. The bleaching action of chlorine is due to

Hydrogenation

Reduction

Chlorination

Oxidation

172. Sea weeds are important source of

Iron

Chlorine

Bromine

Iodine

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

1, 12, 30, 4, 62

9, 17, 35, 53

37, 19, 3, 55

12, 20, 56, 88

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

Has the largest size

In the most readily available gas

Has the lowest ionization enthalpy

Has the highest heat of vaporization

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

Astatine

Francium

Polonium

Radium

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

Both are found together in nature

Both have similar electronic configurations

Both have nearly the same size

The ratio of their charge to size is nearly the same

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

Fluorine

Iodine

Bromine

Chlorine

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

Melting point

Ionic radius

Electro negativity

First ionization energy

179. Among the halogens the rare element is

Fluorine

Astatine

Chlorine

Iodine

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

Fourth

Fifth

Sixth

Third

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

As

P

O

Si

182. XeF₄ on partial hydrolysis produces

XeF₂

XeOF₄

XeO₃

XeOF₂

183. 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

184. Which is valence shell configuration of halogens?

ns₂, nP₅

nS₂, nP₃

NS₂, nP₄

nS₂, nP₆

185. Which of the following is an inert gas?

O₂

N₂

H₂

Argon

186. 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

187. Neon glows in discharge tube as

Bluish

Radish

Yellowish

Greenish

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

O₂¯²

O³¯

OH¯

K⁺

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

Sulphur is present in the mixture as impurity

III group radicals are precipitated as hydroxides

IV group radicals are precipitated as sulphides

Of the oxidation of H₂S gas by some acid radicals

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

Reaction with CO₂

Reaction with NaOH

Reaction with brine solution

Presence of NH₃

191. Which halogen is most electropositive?

Br

Cl

F

I

192. Polyanion formation is maximum in

Oxygen

Boron

Sulphur

Nitrogen

193. Which one is the weakest oxyacid of chlorine?

HCIO

HCIO₂

HCIO₃

HCIO₄

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

C

Be

Si

Al

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

Ba

Cr

Cs

Cu

196. Nitrolim is

Ca(CN)₂ + C

All

CaC₂ + C

CaCN₂ + C

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

None of these

With inert gases

With halogens

With alkali metals

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

Lead

Sodium

Zinc

Silver

199. The most acidic of the following compounds is

As₂O₃

P₂O₃

B₂O₃

Sb₂O₃

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

F₂

Cl₂

I₂

Br₂

Page 9 of 14

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

O₂

O₂-

O₂+

None of these

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

Hyponitrous acid

Nitrogen trichloride

Phosphorus trichloride

Nitrosyl chloride

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

Br

Cl

I

F

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

Strong oxidizing agents

Weak oxidizing agents

Strong reducing agents

Weak reducing agents

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

Some nitrogen molecules analogous to O₂

CO₂

Argon

Greater amount of nitrogen molecules derived from N¹⁵ isotope

206. Which is the strongest acid

HCLO4

HNO3

Cannot be predicted

HCL

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

Radium

Polonium

Francium

Astatine

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

Br > Cl > F

F > Br > Cl

Cl > F > Br

F > Cl > Br

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

Sulphur dioxide

Carbon dioxide

Iodide

Chlorine

210. 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 have ns’ configuring in outermost shells

Alkali metals do not reacts with metals

211. XeF₄ involves which hybridization

Sp³d²

Sp²

Sp²d

Sp

212. Which statement is correct?

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

None of these

Noble gases are all dense gases

Noble gases will all burn in pure oxygen

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

Potassium and magnesium

Potassium only

Magnesium only

Magnesium and chlorine

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

High polarisability

Gaseous nature

Weak van der Waals forces between atoms

Inertness

215. 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

216. Identify the incorrect statement with respect to ozone.

Ozone is more reactive than dioxygen

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

Ozone is diamagnetic whereas dioxygen is paramagnetic

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

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

Boiling point

Atomic radius

Ionization energy

Density

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

Ar

He

H₂

O₂

219. Which of the following is most volatile?

HCl

HI

HBr

HF

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

400

250

1000

200

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

Iron oxide

Alumina

Magnesia

Silica

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

Br

I

F

Cl

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

Castner

Haber

Chamber

Solvay

224. Which halogen have most corrosive action on skin?

F₂

I₂

Br₂

Chlorine

225. The metal used for making radiation shield is

Zn

Pb

Al

Fe

Page 10 of 14

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

Atomic numbers

Nuclear neutron-proton number rations

Atomic masses

Nuclear masses

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

HF is the weakest acid

Fluorine atom is smaller in size

Fluorine is highly reactive

HF molecules form intermolecular H-bonds

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

Effective nuclear charge increases

Atomic mass increases

Additive electrons are accommodated in new electron level

Atomic number increases

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

BaSO₄

KCl

NaCl

CuSO₄

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

35.45 g

17.72 g

70.90 g

88.60 g

231. 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 electronegativity

It restricts to oxidation state – 1 only

It has highest first ionization energy

It is more reactive than other halogens

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

HBr

HF

HCl

HI

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

Ferrous ammonium sulphate

Magnesium sulphates

Magnesium ammonium phosphate

Calcium sulphates

234. 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 no change in the nuclear charge

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

None of these

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

Hydration energy

High atomic number

Electron affinity

Energy dissociation

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

The basic character of the oxides

Ionic character of the compound

The first ionization energy

The stability of +2 oxidation state

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

MO

MO₂

M₂O₃

M₂O

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

Weak acid and weak base

Weak acid and strong base

Strong acid and weak base

Strong acid and strong base

239. 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

Precipitate Mg metal

Precipitate Mg

Have no effect

240. 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

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

SF₄

HeF₄

XeF₄

CF₄

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

Nitrogen dioxide

Dinitrogen tetraoxide

Nitrous oxide

Nitric oxide

243. The noble gas He was discovered by

Chadwick

Rutherford

Frank land and Lockyer

Dorn

244. 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

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

Nitrogen is much less soluble in blood than helium

245. All the elements of oxygen family are

Polymorphic

Non-metals

Radioactive

Metalloids

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

Fluorine does not form oxoacid

Electron affinity of chlorine is greater than that of fluorine

Bond energy of fluorine is less than that of chlorine

Fluorine cannot be prepared by electrolysis of fused metal fluorides

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

Oxygen

Hypochlorous acid

Calcium oxide

Chlorine

248. Freon-12 is used as a

Refrigerant

Insecticide

Herbicide

Fungicide

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

It decreases gradually down the group

None of these

It increases gradually down the group

Noble gases have o heat of vapourization

250. 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

Page 11 of 14

251. The important ore of lead is

Haematite

Chalcopyrites

Galena

Bauxite

252. Bromine is obtained on a commercial scale from

Caliche

Cryolite

Carnallite

Common salt

253. Which of the following has highest dipole moment?

PH₃

NH₃

AsH₃

SbH₃

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

High lattice energy of M²⁺ ions in the solid state

Diamagnetic nature

None of these of M²⁺ ions

High energies of hydration of M²⁺ in solution

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

Kr

Rn

Ar

Xe

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

8

32

18

10

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

To protect the anodes

To act as reducing agent

To make a conducting solution of bauxite

To increase Al production

258. Which of the following is most electronegative?

Si

Pb

Sn

C

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

Electro negativity

N/P ratio

Atomic radius

Ionization energy

260. NaoH is named as caustic soda because

It reacts with fats to form soap

It reacts with chlorine gas

It corrodes the organic tissues

It is used in soda water

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

Sodium hydride

Sodium nitride

Sodium amide

Sodium azide

262. The type of hybridization of born in diborane is

Sp-hybridisation

Sp³- hybridization

Sp³d²-hybridisation

Sp²-hybridisation

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

Expensive but easy to store in cylinder

Expense, but a very uncreative gas

Lighter than air and cheap to produce

Less dense then air and not flammable

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

Cl

F

I

S

265. Strongest reducing agent is

Hl

HCl

HBr

HF

266. The halogen which has only one oxidation state is

Br

I

Cl

F

267. Bond angle is minimum for

H₂S

H₂Te

H₂Se

H₂O

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

Pb

Si

Fe

S

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

Tetrahedral, acidic

Angular, disc

Linear, basic

Linear acidic

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

Br₂ > Cl₂ > F₂ > I₂

Cl₂ > Br₂ > I₂ > F₂

I₂ > Br₂ > Cl₂ > F₂

F₂ > Cl₂ > Br₂ > I₂

271. Common oxidation state of boron are

+1

+3

-3

+3,-3

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

54

2

10

18

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

Na₃AlO₃

NaAlO₂

Na₂Al(OH)₄

Al₂(OH)₄

274. Plaster of Paris is used

In dentistry and surgery

As a plaster for walls

In metallurgical process

As a drying agent

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

SO₂

HCl

H₂S

HBR

Page 12 of 14

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

Mercury

Magnesium

Phosphorus

Copper

277. HNO₂ acts as an/a

Oxidizing agent

All the three

Reducing agent

Acid

278. The melting point in lowest for

Be

Sr

Ca

Mg

279. The noble gases consist of

Single free atoms

Atoms linked by weak bonds

Diatomic molecules

Triatomic molecules

280. Crystalline form of sulphur stale at room temperature is

Prismatic sulphur

Monoclinic sulphur

Plastic sulphur

Rhombic sulphur

281. The last orbit of argon would have electrons

2

18

8

6

282. The ionization potential is lowest for the

Halogens

Alkaline earth metals

Inert gases

Alkali metals

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

Variable trend

Insoluble in water

Highly soluble in water

Less soluble in water

284. All halogen are

Drying agents

Oxidizing as well as reducing agents

Reducing agents

Oxidizing agents

285. Mark the incorrect statement about ‘Li’

‘Li’ has a great tendency to form hydrates

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

‘Li’ combine with nitrogen directly to form Lithium nitride

‘Li’ is not effected by air

286. Mark the smallest atom

I

Cl

F

Br

287. Halogens exist in the form of

Diatomic molecules

Monoatomic molecules

Cannot be predicted

Various forms

288. Electron affinity depends on

Atomic size

Atomic number

Atomic size and nuclear charge both

Nuclear charge

289. Calico printing means

Paper printing

Cloth printing

Glass printing

Leather printing

290. In which form boron exist mostly in nature

Nitrides

Oxides

Oxyborates

Sulphides

291. Who reported first noble gas?

Frank land

Cavendish

J.J Thomson

Ramsay

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

N

Li

P

C

293. P₂O₅ is heated with water to give

Hypo phosphorous acid

Hypo phosphoric acid

Orthophosphoric acid

Phosphorous acid

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

He

Ar

Ne

Xe

295. Which of the following is not isoelectronic?

Mg²⁺

Cl¯

O²¯

Na⁺

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

Low electronegativity

Low charge density

None

Lower electro positivity

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

Flint glass

Borosilicate glass

Soda glass

Crooke’s glass

298. Which one halogen is radioactive?

Iodine

Chlorine

Bromine

Astatine

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

Chromous chloride

Chromic chloride

Chromyl chloride

None

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

Free ions

Atoms of sodium and chlorine

Free molecules

Free electrons

Page 13 of 14

301. 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

302. Deliquescence is a process in which a solid

Absorbs moisture and turn into liquid

Increases the water of crystallization

Loses water of crystallization

Absorbs moisture and remain solid

303. The acid which has a peroxy linkage is

Dithionic acid

Carlo’s acid

Pyrosulphuric acid

Sulphurous acid

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

Sodium bicarbonate

Calcium carbonate

Sodium carbonate

Calcium oxide

305. The structure of XeF₆

Distorted octahedral

Pyramidal

None of these

Tetrahedral

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

Xenon

Radon

Neon

Argon

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

Lower ionization energies

Smaller ionic radii

Highest boiling points

Greater hardness

308. Number of elements present in 5th period is

32

24

8

18

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

Heat of hydration

Electron affinity

Heat of dissociation

Ionization potential

310. NaOH is prepared by the method

Castner cell

Solvay process

Castner Kellner cell

Down’s cell

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

BaCO₃

ZnS

BaSO₄

MnS

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

Density

Ionization energy

Atomic radius

Boiling point

313. Among noble gases xenon gives compounds due to

Structure

Large size

Zero electron affinity

Higher I-P

314. 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 carbonate

A nitrate

A sulphate

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

Antiferromagnetic

Ferromagnetic

Paramagnetic

Diamagnetic

316. 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-3, b-1, c-4, d-2

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

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

317. The one which does not show variable valency is

Titanium

Barium

Lead

Copper

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

Chlorine

Bromine

Fluorine

Iodine

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

Lr

Ra

Fr

Rn

320. A clathrate may be defined as a

Mixture

Solid solution

Liquid crystal

Cage compound

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

Small size of lithium atom and Li⁺ ion

Greater hardness of Li

Extremely high electropositivity of Li

Hydration of Li⁺ ion

322. Which one of these is most reactive?

Pb

K

Mg

Na

323. SO3 is not dissolve directly in H2O because

The reaction is quite slow

SO₃ is insoluble in H₂O

The reaction does not go to completion

The reaction is highly exothermic

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

Na

Rb

K

Cs

325. Mark the nitrate which decomposes differently on heating

NaNO₃

KNO₃

RbNO₃

LiNO₃

Page 14 of 14

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

Solvated electrons

Sodium amide

Sodium hydride

Sodium atoms

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

CaO has high m.p.

Kl has high m.p.

Kl is soluble in benzene

Lattice energy of CaO is much higher than that of Kl

328. Oxygen shows oxidation states

-2, +2, +6

-2

+2, -2

+2, +4, +6

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

Al > Mg > Na > Si

Mg > Na > Al > Si

Na > Mg > Al > Si

Si > Mg > Al > Na

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

Decreases down the group

Variation is not regular

Increases down the group

Remains unchanged

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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