ECAT Chemistry The Halogens and Noble Gases Chapter Test Online

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Chemistry

1. The correct formula of Plaster of Paris is

CaSO₄

CaSO₄.2H₂O

CaSO₄. 1/2H₂O

CaSO₄. 3H₂O

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

Lattice energy

Hydration energy

Electron affinity

Ionization energy

3. Which of the halogen has highest electronegativity?

Iodine

Chlorine

Fluorine

Bromine

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

Electron affinity

Hydration energy

Energy dissociation

High atomic number

5. Heavy water is obtained by

Prolonged electrolysis of water

Simple distillation of water

Dissolving heavy salt in water

Removing impurities of calcium and magnesium form water

6. Cl₂O₇ is best prepared by passing by

Chlorine gas over hot HgO

Perchloric acid (CHIO₄) over hot silver oxide

Chlorine and oxygen over hot silver chlorate

Hydrogen chloride over phosphorus pentoxide

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

It has oxidation state of +4

It is a gas at room temperature

It forms RX₂

It forms R₂O₃

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

Francium

Polonium

Astatine

Radium

9. NaoH is named as caustic soda because

It reacts with chlorine gas

It reacts with fats to form soap

It is used in soda water

It corrodes the organic tissues

10. Which of the following oxides is peroxide?

Mn₂O

SO₂

BaO

Na₂O₂

11. Which is the strongest acid?

HClO

HClO₂

HClO₄

HClO₃

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

Iodine

Fluorine

Chlorine

Bromine

13. Which statement is correct?

Noble gases are all dense gases

None of these

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

Noble gases will all burn in pure oxygen

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

Heavy metals

Halogens

Light metals

Noble gases

15. SO3 is not dissolve directly in H2O because

SO₃ is insoluble in H₂O

The reaction is quite slow

The reaction is highly exothermic

The reaction does not go to completion

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

S

Fe

Pb

Si

17. The element that does not form a monoxide is

Tin

Silicon

Lead

Germanium

18. Freon-12 is used as a

Insecticide

Fungicide

Refrigerant

Herbicide

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

Solvay

Castner

Haber

Chamber

20. The noble gas He was discovered by

Dorn

Frank land and Lockyer

Chadwick

Rutherford

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

Magnesium

Phosphorus

Mercury

Copper

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

Ar is used in electric bulbs

Half-life of Rn is only 3-8 days

Ne is obtained during radioactive disintegration

HE is used in producing very low temperatures

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

None of these

Dipole-dipole forces

H. bonding

Strongest vanderwaal’s force

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

Melting point

Electro negativity

Ionic radius

First ionization energy

25. 6NaOH + Cl₂ → 5Nacl + Naclo₃ in this reaction chlorine is

Oxidized

Both oxidized and reduced

Reduced

No change

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26. The most acidic of the following compounds is

B₂O₃

As₂O₃

P₂O₃

Sb₂O₃

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

NH₃ + H₂CO₃ → NH₄HCO₃

2NaOH + CO₂ → Na₂CO₃ + H₂O

CO₃ + H₂O → H₂CO₃

NaCl + NH₄HCO₃ → NaHCO₃ + NH₄Cl

28. Which one halogen is radioactive?

Iodine

Chlorine

Bromine

Astatine

29. The melting point in lowest for

Ca

Sr

Be

Mg

30. The colour of I₂ in CCI₄ is

Bluish green

Radish brown

Colourless

Violet

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

Polonium

Francium

Astatine

Radium

32. Alkaline earth metals comes under

Transition elements

Halogens

Inner transition elements

Representative elements

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

To increase Al production

To act as reducing agent

To protect the anodes

To make a conducting solution of bauxite

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

O³¯

O₂¯²

OH¯

K⁺

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

Sodium atoms

Sodium hydride

Sodium amide

Solvated electrons

36. Which of the following is true for magnesium?

It is more electropositive than sodium

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

37. 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

Zero

800 mL

200mL

10mL

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

H₂S

HCl

SO₂

HBR

39. 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

40. Which of the following is most electronegative?

Si

Sn

C

Pb

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

The lattice energy has no role to play in solubility

Both a and b

The lattice energy of BaSO₄ is more than its hydration energy

The hydration energy of Na₂SO₄ is more than its lattice energy

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

Cl₂

O₂

H₂

H₂O

43. Which is valence shell configuration of halogens?

NS₂, nP₄

nS₂, nP₆

nS₂, nP₃

ns₂, nP₅

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

Argon

Radon

Neon

Xenon

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

Tri-calcium aluminate

Tetra calcium aluminoferrite

Tri-calcium silicate

Diclacium silicate

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

B > N > C > O

O > C > B > N

O > B > C > N

O > C > N > B

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

Free molecules

Free ions

Atoms of sodium and chlorine

Free electrons

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

Potassium and magnesium

Magnesium and chlorine

Magnesium only

Potassium only

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

B

Ne

F

Li

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

Coke

Coal

Graphite

Diamond

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

It changes into CaCl₂ and Ca(OH)₂

It change into calcium hypochlorate

It absorbs moisture

It changes into calcium chloride and calcium chlorate

52. A clathrate may be defined as a

Cage compound

Solid solution

Mixture

Liquid crystal

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

Br > Cl

Sr > Ca

P > Si

C > N

54. Boron compounds behave as Lewis acid because of their

Covalent nature

Acidic nature

Ionization property

Electron deficiency

55. Halogens exist in the form of

Diatomic molecules

Monoatomic molecules

Cannot be predicted

Various forms

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

Noble gases have o heat of vapourization

None of these

It increases gradually down the group

It decreases gradually down the group

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

Krypton

Argon

Neon

Helium

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

Ne

Mg⁺

Li⁺

Al⁺

59. Which noble gas is used in labors?

Argon

Helium

Neon

Krypton

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

Si

Be

Al

C

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

Si

O

As

P

62. Which one has highest electron affinity?

I

Br

Cl

F

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

Barium

Calcium

Strontium

Beryllium

64. Mark the correct statement

None of these

Cl₂ is more insoluble in water

Br is more reactive than Cl₂

Iodine is a solid

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

Calcium sulphates

Ferrous ammonium sulphate

Magnesium ammonium phosphate

Magnesium sulphates

66. Bond angle is minimum for

H₂Te

H₂O

H₂Se

H₂S

67. The type of hybridization of born in diborane is

Sp²-hybridisation

Sp-hybridisation

Sp³- hybridization

Sp³d²-hybridisation

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

XeF₄

XeF₃

XeF₂

XeF₆

69. 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

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

Nitrogen is highly soluble in water

Helium is much less soluble in blood than nitrogen

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

Weak reducing agents

Strong reducing agents

Strong oxidizing agents

Weak oxidizing agents

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

Bromine

Fluorine

Chlorine

Iodine

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

I₂

F₂

Cl₂

Br₂

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

Greater hardness of Li

Extremely high electropositivity of Li

Small size of lithium atom and Li⁺ ion

Hydration of Li⁺ ion

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

Sodium amide

Sodium nitride

Sodium hydride

Sodium azide

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

Copper

Iron

Aluminum

Zinc

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

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

Three layers have different densities

Three layers are maintained at different temperatures

There is special arrangement is cell to keep the layers separate

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

Density

Boiling point

Ionization energy

Atomic radius

78. Aluminum (III) chloride forms a dimer because

It cannot form a trimer

Higher co-ordination can be achieved by Al

Al belongs to third group

Al has high ionization energy

79. Which of the noble gas has highest polarizabilities?

He

Kr

Xe

Ar

80. 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 a strong oxidizing agent

Elemental Na is insoluble in NH₃

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

Ba

Cu

Cr

Cs

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

Expense, but a very uncreative gas

Lighter than air and cheap to produce

Expensive but easy to store in cylinder

Less dense then air and not flammable

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

Rn

Ar

He

Ne

84. 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

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

Orthophosphoric acid

Pyro phosphoric acid

Hypo phosphorous acid

Metaphosphoric acid

86. Polyanion formation is maximum in

Oxygen

Sulphur

Boron

Nitrogen

87. Which one of these is most reactive?

Mg

K

Pb

Na

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

Electro negativity

N/P ratio

Ionization energy

Atomic radius

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 is the most volatile compound?

HI

HCl

HF

HBr

91. 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

CO₂

Greater amount of nitrogen molecules derived from N¹⁵ isotope

Some nitrogen molecules analogous to O₂

92. AlCl₃ flumes in moist air because

It is highly hygroscopic

It is covalent

It is very volatile

HCl is formed in moist air

93. XeF₄ involves which hybridization

Sp²

Sp

Sp³d²

Sp²d

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

Fluorine cannot be prepared by electrolysis of fused metal fluorides

Fluorine does not form oxoacid

Bond energy of fluorine is less than that of chlorine

Electron affinity of chlorine is greater than that of fluorine

95. Variable valency is characteristic of

Noble gas

Alkali metals

Halogen

Transition elements

96. The important ore of lead is

Galena

Chalcopyrites

Haematite

Bauxite

97. 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

98. Which of the following is most electronegative?

Tin

Carbon

Silicon

Lead

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

Fluorine

Chlorine

Bromine

Iodine

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

Mass number

Atomic mass

Atomic number

Isotopic number

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101. Fluorine differs from other halogens due to

Low first ionization energy

All

Small size

High dissociation energy

102. In which form boron exist mostly in nature

Nitrides

Oxides

Oxyborates

Sulphides

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

Br

I

Cl

F

104. HNO₂ acts as an/a

Oxidizing agent

Acid

All the three

Reducing agent

105. Which one is the weakest oxyacid of chlorine?

HCIO₃

HCIO₄

HCIO

HCIO₂

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

The stability of +2 oxidation state

The basic character of the oxides

Ionic character of the compound

The first ionization energy

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

10

2

54

18

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

NaBr

NaCl

NaF

Nal

109. Vander Waals forces are stronger in

Cl₂

F₂

Br₂

I₂

110. Sea weeds are important source of

Iron

Bromine

Iodine

Chlorine

111. Identify the incorrect statement with respect to ozone.

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

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

Ozone is diamagnetic whereas dioxygen is paramagnetic

Ozone is more reactive than dioxygen

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

CF₄

XeF₄

HeF₄

SF₄

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

Weak acid and weak base

Strong acid and weak base

Weak acid and strong base

Strong acid and strong base

114. Mark the element which shows greatness inert pair effect

Iodine

Fluorine

Chlorine

Bromine

115. The acid which has a peroxy linkage is

Dithionic acid

Pyrosulphuric acid

Sulphurous acid

Carlo’s acid

116. The substance not likely to contain CaCO₃ is

Calcried gypsum

Dolomite

Sea shells

A marble states

117. The alkali metals

Show increasing electro negativity from Li to Cs.

Form salts which are predominantly covalent

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

Form salt like hydrides

118. Who reported first noble gas?

J.J Thomson

Frank land

Cavendish

Ramsay

119. Mark the compound which does not exist

AsF₅

SbCl₅

NCl₅

PF₅

120. 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

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

Energy dissociation

High atomic number

Hydration energy of ion

Electron affinity

122. Plaster of Paris is used

As a plaster for walls

In metallurgical process

In dentistry and surgery

As a drying agent

123. 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

In the most readily available gas

Has the highest heat of vaporization

124. Which noble gas is used earth quake prediction?

Rn

He

Ar

Kr

125. The most abundant inert gas in the atmosphere is

Ar

Kr

He

Ne

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

O₂ and CO₂

O₂ and Ar

CO₂ and Ar

O₂ and He

127. Among the halogens the rare element is

Astatine

Iodine

Chlorine

Fluorine

128. Mark the nitrate which decomposes differently on heating

KNO₃

RbNO₃

LiNO₃

NaNO₃

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

N

Li

P

C

130. Bromine is obtained on a commercial scale from

Caliche

Cryolite

Common salt

Carnallite

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

NH₃

CO₂

CO

Al₂O₃

132. Hypo is used in photography for

Picture printed

The fixation of picture

Developing picture

The colour of picture

133. 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

SiO₂

CO₂

SnO₂

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

Atomic masses

Nuclear neutron-proton number rations

Atomic numbers

Nuclear masses

135. Which one boric acid is stable one?

None of these

H₃BO₃

H₂B₄O₇

HBO₃

136. Which halogen have most corrosive action on skin?

Chlorine

Br₂

I₂

F₂

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

Cl₂

Br₂

I₂

F₂

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

Sodium

Zinc

Silver

Lead

139. All halogen are

Oxidizing as well as reducing agents

Drying agents

Reducing agents

Oxidizing agents

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

Decreases down the group

Variation is not regular

Remains unchanged

Increases down the group

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

O₂+

None of these

O₂-

O₂

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

Al

Si

F

Tl

143. The shape of gaseous SnCl₂ is

Linear

Tetrahedral

t-shaped

Angular

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

Al₂(OH)₄

Na₂Al(OH)₄

Na₃AlO₃

NaAlO₂

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

Lower electro positivity

Low charge density

Low electronegativity

None

146. Cassiterite is an ore of

Mn

Ni

Sn

Sb

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

Highly soluble in water

Insoluble in water

Variable trend

Less soluble in water

148. Which one is hygroscopic in nature?

HUO4

HBr

HCL

HNO3

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

Ar

Ne

Xe

He

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

Carbon dioxide

Sulphur dioxide

Chlorine

Iodide

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

Si > Mg > Al > Na

Al > Mg > Na > Si

Na > Mg > Al > Si

Mg > Na > Al > Si

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

I

F

Br

Cl

153. Deliquescence is a process in which a solid

Absorbs moisture and turn into liquid

Absorbs moisture and remain solid

Increases the water of crystallization

Loses water of crystallization

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

Of localized electrons in it

Borazole is polar compound

Borazole is nonpolar compound

Borazole is electron deficient compound

155. Alkali metals are generally extracted by

Displacement methods

Double decomposition methods

Electrolytic methods

Reduction methods

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

44%

11%

33%

22%

157. What causes nitrogen to be chemically inert?

Absence of bond polarity

High bond energy

Multiple bond formation in the molecule

Short internuclear distance

158. The most powerful oxidizing agent among the halogens is

F₂

Cl₂

I₂

Br₂

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

Sodium amide

Sodium hydride

Sodium atoms

Solvated electrons

160. The halogen having highest electron affinity is

Bromine

Iodine

Chlorine

Fluorine

161. Which of the following has greatest reducing power?

HBr

HI

HCl

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

K

Rb

Na

Cs

163. The bleaching action of chlorine is due to

Chlorination

Oxidation

Reduction

Hydrogenation

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

Rn

Kr

Ar

Xe

165. What is more true about alkali metals?

Oxidizing agents

Both oxidizing and reducing agents

Reducing agents

Hydrolyzing agents

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

Cl > F > Br

F > Br > Cl

F > Cl > Br

Br > Cl > F

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

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

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

None of these

There is no change in the nuclear charge

168. The following has zero valency

Kr

Al

Na

Be

169. Which statement is correct about halogens?

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 univalent ions

They are all diatomic and form divalent ions

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

BaCO₃

MnS

BaSO₄

ZnS

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

As an oxidizer in metallurgy

As an abrasive in the form of abundum

In form of foil for wrapping

For preparing artificial

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

s-orbitals

None

p-orbitals

d-orbitals

173. 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

Sulphur is present in the mixture as impurity

IV group radicals are precipitated as sulphides

Of the oxidation of H₂S gas by some acid radicals

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

Small ionic size of Li⁺

High ∆H lattice

High covalent nature

Low ∆H lattice

175. Which of the following has highest dipole moment?

AsH₃

PH₃

NH₃

SbH₃

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

Fe

Al

Na

Mg

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

Magnesia

Silica

Alumina

Iron oxide

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

HF

HBr

Hl

HCl

179. Among noble gases xenon gives compounds due to

Higher I-P

Zero electron affinity

Structure

Large size

180. The metal used for making radiation shield is

Pb

Al

Fe

Zn

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

Helium

Neon

Nitrogen

Oxygen

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

Fr

Rn

Lr

Ra

183. Calcium is obtained by

Electrolysis of molten anhydrous or fused calcium chloride

Electrolysis of solution of calcium chloride in water

Roasting lime stone

Reduction of calcium chloride with carbon

184. The ionization potential is lowest for the

Halogens

Inert gases

Alkaline earth metals

Alkali metals

185. The noble gas forming the maximum number of compounds

Ar

Ne

Xe

He

186. An atom with high electro negativity has

High ionization potential

Large size

Low ionization potential

Low electron affinity

187. Which shows maximum catenation property?

Te

S

O

Se

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

Iodine

Chlorine

Fluorine

Bromine

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

Chromium

Cobalt

Iron

Magnesium

190. P₂O₅ is heated with water to give

Hypo phosphoric acid

Orthophosphoric acid

Phosphorous acid

Hypo phosphorous acid

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

F

O

U

Br

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

Converting sand into silici acid

Keeping it cool

Developing interlocking needle like crystals of hydrated silicates

Hydrating sand and gravel mixed with cement

193. The structure of XeF₆

Pyramidal

Distorted octahedral

None of these

Tetrahedral

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

Low melting point

High ionization energy

Low electronegativity

Their ions are isoelectronic with noble gases

195. Which gives green colour in fireworks?

Potassium

Sodium

Calcium

Barium

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

MO₂

M₂O₃

M₂O

MO

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

Zn

Li

He

N

198. 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 sulphate

A carbonate

A nitrate

A bromide

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

NaCl

Ki

Chlorine

Iodine solution

200. Which gas can support combustion?

CO

N₂

N₂O

CO₂

Page 9 of 14

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

Sun light

Dry air

Moisture

None of these

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

Dissolving out unreacted silver bromide

Preventing overdeveloping and fogging

Converting silver halides to metallic silver

Reducing solubility of AgBr

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

F

S

Cl

I

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

F₂ > Cl₂ > Br₂ > I₂

Br₂ > Cl₂ > F₂ > I₂

I₂ > Br₂ > Cl₂ > F₂

Cl₂ > Br₂ > I₂ > F₂

205. Orthophosphoric acid is

Tetrabasic

Tribasic

Monobasic

Dibasic

206. 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

Kl has high m.p.

Kl is soluble in benzene

CaO has high m.p.

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

NaCl

CuSO₄

KCl

BaSO₄

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

18

32

10

8

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

30

40

10

20

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

Heat of hydration

Ionization potential

Electron affinity

Heat of dissociation

211. Which is the strongest acid

HCLO4

HCL

Cannot be predicted

HNO3

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

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

They are far below 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

213. XeF₄ on partial hydrolysis produces

XeF₂

XeOF₂

XeO₃

XeOF₄

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

Both have similar electronic configurations

Both have nearly the same size

The ratio of their charge to size is nearly the same

Both are found together in nature

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

Gaseous nature

Inertness

Weak van der Waals forces between atoms

High polarisability

216. Mark the smallest atom

F

Br

Cl

I

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

Nitric oxide

Nitrogen dioxide

Dinitrogen tetraoxide

Nitrous oxide

218. Which one has least dissociation energy?

HF

HI

HCL

HBr

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

Crooke’s glass

Flint glass

Soda glass

Borosilicate glass

220. Calico printing means

Leather printing

Cloth printing

Glass printing

Paper printing

221. Oxygen shows oxidation states

-2

+2, +4, +6

-2, +2, +6

+2, -2

222. The halogen which has only one oxidation state is

I

Br

Cl

F

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

Lose 2 electrons

Gain 2 electrons

Gain 3 electrons

Lose 3 electrons

224. The last orbit of argon would have electrons

6

8

18

2

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

Additive electrons are accommodated in new electron level

Atomic mass increases

Atomic number increases

Effective nuclear charge increases

Page 10 of 14

226. 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

High energies of hydration of M²⁺ in solution

Diamagnetic nature

None of these of M²⁺ ions

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

Gypsum

Borax

Calomel

Alum

228. 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

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

Mixture of neon and oxygen

Mixture of xenon and nitrogen

Mixture of helium and oxygen

Mixture of argon and oxygen

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

B

C

A

D

231. Which of the following is most volatile?

HBr

HF

HI

HCl

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

5/2

½

2

1½

233. The name of CaSO₄. ½ H₂O is

Dolomite

Epsom salt

Gypsum

Plaster of Paris

234. 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 first ionization energy

It has highest electronegativity

It restricts to oxidation state – 1 only

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

1, 12, 30, 4, 62

37, 19, 3, 55

12, 20, 56, 88

9, 17, 35, 53

236. NaOH is prepared by the method

Down’s cell

Solvay process

Castner cell

Castner Kellner cell

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

Na, Cl

Cl, Br

Na, Ca

Ca, Cl

238. The halogen that is most easily reduced is

Cl₂

F₂

Br₂

I₂

239. Sulphuric acid has great affinity for water because

Acid decomposes water

It hydrolyses the acid

It decomposes the acid

Acid forms hydrates with water

240. Identify the correct statement

Plaster of Paris is obtained by partial oxidation of gypsum

Gypsum is obtained by heating plaster of pairs

Gypsum contains a lower percentage of calcium than plaster of pairs

Plaster of Pairs can be obtained by partial oxidation of gypsum

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

It oxidizes lead sulphides

It oxidizes potassium iodide

It cannot act as a bleaching agent

It oxidizes mercury

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

With alkali metals

None of these

With inert gases

With halogens

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

Gallium and Germanium

Iron and sulphur

Aluminum and silicon

Proton and silicon

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

Phosphorus from phosphorite

Solvay process of sodium carbonate

Iron from haematite

Ordinary (soda lime) glass

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

Sodium persulphate

Sodium thiosulphate

Sodiums sulphates

Sodium sulphides

246. Electron affinity of sulphur is

More than O but less than Se

More than O and Se

Less than O but more than SE

Equal to O and Se

247. Nitrolim is

All

CaCN₂ + C

Ca(CN)₂ + C

CaC₂ + C

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

Oxygen

Nitrogen

Carbon

Boron

249. Hydrochloric acid at 25°C is

Ionic and gas

Covalent and liquid

None of these

Ionic and liquid

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

CaC₂

CaCO₃

Ca and CO₂

CaO

Page 11 of 14

251. Strongest reducing agent is

HF

Hl

HCl

HBr

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

Different resistance under different circumstance

Increase in resistance with increase in temperature

Decease in resistance with intensity of light

Decrease in resistance with increase in temperature

253. Crystalline form of sulphur stale at room temperature is

Prismatic sulphur

Plastic sulphur

Monoclinic sulphur

Rhombic sulphur

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

More electro negativity of fluorine

More electron repulsion in fluorine

Small size of fluorine

Non-metallic nature of fluorine

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

Chlorine

Calcium oxide

Hypochlorous acid

Oxygen

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

Phosphorus pentoxidse

Anhydrous calcium chloride

Active charcoal

Na₃PO₄

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

Cl¯

S²¯

K⁺

Ca²⁺

258. The noble gases are

All of these

Polyatomic

Diatomic

Monoatomic

259. Which of the following is correct?

Sodium reduces CO₂ to carbon

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

Magnesium reacts with cold water and liberates hydrogen

Magnallium is one alloy of Mg and zinc

260. Which one is the biggest ion?

Na⁺

Ba²⁺

Mg²⁺

Al³⁺

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

Sodium carbonate

Calcium carbonate

Sodium bicarbonate

Calcium oxide

262. Which halogen has application in medicines mostly?

I₂

Br2

None

Cl₂

263. Which halogen is most electropositive?

Cl

Br

I

F

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

Prevent puncturing by under sea rock

Keep away the sharks

To prevent the action of water and salt

Mark the ship lighter

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

Chlorophyll

Haemoglobin

Florigen

ATP

266. White enamel of our teeth is

CaCl₂

CaF₂

CaBr₂

Ca₃(PO₄)₂

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

Copper

Sodium

Iron

Lead

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

Smaller ionic radii

Lower ionization energies

Greater hardness

Highest boiling points

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

Phosphorus trichloride

Hyponitrous acid

Nitrosyl chloride

Nitrogen trichloride

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

Entropy of solution formation

Inter ionic attraction

Lattice energies if solids

Hydration energies of cations

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

2,8,18,2

2,8

2,8,7

2,8,2

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

Bauxite is available in large quantity

Bauxite contains maximum of Al

Bauxite is less impure

Of easy extraction of Al from it

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

Lattice energy solids

Hydration energies of cations

Entropy of solution formation

Inter – ionic attraction

274. Which one of them is monoatomic?

Fluorine

Neon

Nitrogen

Oxygen

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

Diamagnetic

Antiferromagnetic

Paramagnetic

Ferromagnetic

Page 12 of 14

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

14

11

16

10

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

Atomic radius

Ionization energy

Boiling point

Density

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

Third

Sixth

Fifth

Fourth

279. Sulphuric acid reacts with PCl₅ to give

Thionyl chloride

Sulphur monochloride

Sulphur tetrachloride

Sulphuryl chloride

280. The noble gases consist of

Triatomic molecules

Atoms linked by weak bonds

Diatomic molecules

Single free atoms

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

Angular, disc

Tetrahedral, acidic

Linear acidic

Linear, basic

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

I₂>Br₂>U₂>F₂

F₂>Cl₂>Br₂>I2

I₂>F₂>Br₂>U₂

U₂>Br₂>I₂>F₂

283. Which of the following is an inert gas?

Argon

O₂

N₂

H₂

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

Reaction with brine solution

Reaction with NaOH

Presence of NH₃

Reaction with CO₂

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

Ca

Mg

Ba

Sr

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

All are non-metals

All the halogens have electronic configuration ns2P5

They have high electron affinity and ionization energy

All the halogens react with noble gases to form their halides

287. Electron affinity depends on

Atomic size

Nuclear charge

Atomic size and nuclear charge both

Atomic number

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

O₂

CO

CO₂

H₂O₂

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

Li

Mg

Rb

Cl

290. Number of elements present in 5th period is

8

24

32

18

291. The one which does not show variable valency is

Titanium

Barium

Copper

Lead

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

Te

None of these

Se

Po

293. 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

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

Fluorine atom is smaller in size

Fluorine is highly reactive

HF molecules form intermolecular H-bonds

HF is the weakest acid

295. Electropositive character increase down the group due to

All of these

Decrease in electronegativity of the elements

Decrease in I.P

Increase in atomic size of elements

296. Permonosulphuric acid is known as

Carlo’s acid

Sulphuric acid

Marshall’s acid

None of these

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

He⁺

H

Li⁺

Na

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

F

I

Cl

Br

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

Radon

Neon

Helium

Argon

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

Sodium ion

Nitride ion

Chloride ion

Fluoride ion

Page 13 of 14

301. Select the weakest acid among the following

HF

HBr

HI

HCl

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

Ba

Rb

K

Li

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

Chromic chloride

Chromyl chloride

Chromous chloride

None

304. Which statement is true about IV A group

There is a regular gradation of properties from top to bottom

Whole group consist of non-metals

Marked change of properties

Abrupt change of properties

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

B³⁺

Li⁺

O²¯

F¯

306. The percentage of lead in lead pencil is

80

20

70

Zero

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

Small ionic size

Large atomic size

Metallic properties

Strongly bond valence electrons

308. Common oxidation state of boron are

+3

+1

-3

+3,-3

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

H₂

O₂

Cl₂

Na

310. Which of the following phosphorus is most reactive?

Violet phosphorus

Red phosphorus

White phosphorus

Scarlet phosphorus

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

HI

HU

HF

HBr

312. 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-1, b-4, c-2, d-3

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

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

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

12

7

16

14

314. Which of the following is not isoelectronic?

O²¯

Na⁺

Mg²⁺

Cl¯

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

H₂

Ar

O₂

He

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

Lead nitrate

Potassium chlorate

Manganese dioxide

Mercuric oxide

317. Which of the following is acidic?

N₂O

BeO

HgO

SO₃

318. Mark the incorrect statement about ‘Li’

‘Li’ is not effected by air

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

‘Li’ combine with nitrogen directly to form Lithium nitride

‘Li’ has a great tendency to form hydrates

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

Br

Cl

F

I

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

Cl

I

F

Br

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

Po

Te

Pb

Fe

322. Which of the following statements is incorrect?

Melting and boiling points of alkali metals decrease down the group

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

Sodium is the most abundant metallic element in sea water

Ionic character of alkali metal halides decreases down the group

323. Neon glows in discharge tube as

Yellowish

Bluish

Radish

Greenish

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

In sea

As salts in ponds

In lakes

In the atmosphere

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

HF

HI

HCl

HBr

Page 14 of 14

326. 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 restricts to oxidation state – 1 only

It has highest first I.E

327. All the elements of oxygen family are

Metalloids

Radioactive

Non-metals

Polymorphic

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

70.90 g

88.60 g

35.45 g

17.72 g

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

Alkali metals

Halogens

Nitrogen family

Oxygen family

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

Ionic

Covalent

Metallic

Coordinate

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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