ECAT Chemistry The Halogens and Noble Gases Chapter Test Online

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Chemistry

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

Mercuric oxide

Potassium chlorate

Lead nitrate

Manganese dioxide

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

Metaphosphoric acid

Orthophosphoric acid

Pyro phosphoric acid

Hypo phosphorous acid

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

Fe

Na

Mg

Al

4. Mark the incorrect statement about ‘Li’

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

‘Li’ has a great tendency to form hydrates

‘Li’ combine with nitrogen directly to form Lithium nitride

‘Li’ is not effected by air

5. Which is the strongest acid?

HClO₃

HClO

HClO₂

HClO₄

6. XeF₄ on partial hydrolysis produces

XeF₂

XeOF₄

XeO₃

XeOF₂

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

B³⁺

O²¯

Li⁺

F¯

8. Which noble gas is used in labors?

Helium

Argon

Neon

Krypton

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

Argon

Neon

Radon

Helium

10. The name of CaSO₄. ½ H₂O is

Gypsum

Epsom salt

Dolomite

Plaster of Paris

11. Which one of them is monoatomic?

Nitrogen

Neon

Oxygen

Fluorine

12. 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.

CO₂

Some nitrogen molecules analogous to O₂

Greater amount of nitrogen molecules derived from N¹⁵ isotope

Argon

13. The colour of I₂ in CCI₄ is

Bluish green

Radish brown

Colourless

Violet

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

Br

O

F

U

15. Alkaline earth metals comes under

Halogens

Inner transition elements

Representative elements

Transition elements

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

Less dense then air and not flammable

Lighter than air and cheap to produce

Expense, but a very uncreative gas

Expensive but easy to store in cylinder

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

Entropy of solution formation

Inter – ionic attraction

Hydration energies of cations

Lattice energy solids

18. 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

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

XeF₄

CF₄

SF₄

HeF₄

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

Hydrating sand and gravel mixed with cement

Converting sand into silici acid

Keeping it cool

Developing interlocking needle like crystals of hydrated silicates

21. Select the weakest acid among the following

HCl

HF

HI

HBr

22. 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

23. All halogen are

Oxidizing agents

Oxidizing as well as reducing agents

Drying agents

Reducing agents

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

P

N

C

Li

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

Calcium oxide

Calcium carbonate

Sodium carbonate

Sodium bicarbonate

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

Flint glass

Crooke’s glass

Soda glass

Borosilicate glass

27. Calcium is obtained by

Roasting lime stone

Electrolysis of molten anhydrous or fused calcium chloride

Electrolysis of solution of calcium chloride in water

Reduction of calcium chloride with carbon

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

It decreases gradually down the group

Noble gases have o heat of vapourization

None of these

It increases gradually down the group

29. Identify the correct statement

Plaster of Paris is obtained by partial oxidation of gypsum

Gypsum is obtained by heating plaster of pairs

Plaster of Pairs can be obtained by partial oxidation of gypsum

Gypsum contains a lower percentage of calcium than plaster of pairs

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

Alkali metals

Halogens

Oxygen family

Nitrogen family

31. What causes nitrogen to be chemically inert?

High bond energy

Absence of bond polarity

Short internuclear distance

Multiple bond formation in the molecule

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

Cl

Li

Rb

Mg

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

Borax

Alum

Gypsum

Calomel

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

Nitrogen dioxide

Dinitrogen tetraoxide

Nitric oxide

Nitrous oxide

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

H₂S

HCl

SO₂

HBR

36. Which is the strongest acid

HNO3

Cannot be predicted

HCLO4

HCL

37. Mark the compound which does not exist

PF₅

AsF₅

NCl₅

SbCl₅

38. Sulphuric acid reacts with PCl₅ to give

Sulphur monochloride

Thionyl chloride

Sulphur tetrachloride

Sulphuryl chloride

39. 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 restricts to oxidation state – 1 only

It has highest electronegativity

It has highest first ionization energy

It is more reactive than other halogens

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

Ferromagnetic

Antiferromagnetic

Paramagnetic

Diamagnetic

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

Three layers are maintained at different temperatures

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

Three layers have different densities

There is special arrangement is cell to keep the layers separate

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

Na > Mg > Al > Si

Mg > Na > Al > Si

Si > Mg > Al > Na

Al > Mg > Na > Si

43. NaoH is named as caustic soda because

It reacts with fats to form soap

It corrodes the organic tissues

It reacts with chlorine gas

It is used in soda water

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

Ki

Iodine solution

NaCl

Chlorine

45. Which of the following is an inert gas?

O₂

Argon

N₂

H₂

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

Sodium thiosulphate

Sodium persulphate

Sodiums sulphates

Sodium sulphides

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

For preparing artificial

As an abrasive in the form of abundum

In form of foil for wrapping

As an oxidizer in metallurgy

48. 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

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

In the atmosphere

In sea

As salts in ponds

In lakes

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

HF

HI

HCl

HBr

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

Pb

Si

S

Fe

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

Magnesia

Silica

Iron oxide

Alumina

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

XeF₃

XeF₆

XeF₄

XeF₂

54. Aluminum (III) chloride forms a dimer because

Al has high ionization energy

It cannot form a trimer

Al belongs to third group

Higher co-ordination can be achieved by Al

55. P₂O₅ is heated with water to give

Hypo phosphorous acid

Hypo phosphoric acid

Orthophosphoric acid

Phosphorous acid

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

P

Si

As

O

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

Cl₂ > Br₂ > I₂ > F₂

Br₂ > Cl₂ > F₂ > I₂

I₂ > Br₂ > Cl₂ > F₂

F₂ > Cl₂ > Br₂ > I₂

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

Chlorine

Fluorine

Bromine

Iodine

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

Zn

Li

N

He

60. Mark the element which shows greatness inert pair effect

Iodine

Bromine

Chlorine

Fluorine

61. Which one is the biggest ion?

Na⁺

Al³⁺

Mg²⁺

Ba²⁺

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

Fluorine cannot be prepared by electrolysis of fused metal fluorides

Electron affinity of chlorine is greater than that of fluorine

Bond energy of fluorine is less than that of chlorine

Fluorine does not form oxoacid

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

Lose 2 electrons

Gain 3 electrons

Lose 3 electrons

Gain 2 electrons

64. Calico printing means

Leather printing

Paper printing

Glass printing

Cloth printing

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

Mixture of helium and oxygen

Mixture of neon and oxygen

Mixture of xenon and nitrogen

Mixture of argon and oxygen

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

The lattice energy of BaSO₄ is more than its hydration energy

The lattice energy has no role to play in solubility

The hydration energy of Na₂SO₄ is more than its lattice energy

Both a and b

67. Halogens exist in the form of

Monoatomic molecules

Various forms

Diatomic molecules

Cannot be predicted

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

Hydration energies of cations

Lattice energies if solids

Inter ionic attraction

Entropy of solution formation

69. 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 is a gas at room temperature

It forms R₂O₃

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

I

S

Cl

F

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

Reducing solubility of AgBr

Dissolving out unreacted silver bromide

Preventing overdeveloping and fogging

Converting silver halides to metallic silver

72. 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

Diamagnetic nature

High energies of hydration of M²⁺ in solution

73. The noble gas forming the maximum number of compounds

Ne

Ar

He

Xe

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

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

There is no change in the nuclear charge

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

None of these

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

Si

Tl

F

Al

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

14

7

12

16

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

Br₂

Cl₂

F₂

I₂

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

Oxygen

Calcium oxide

Hypochlorous acid

Chlorine

79. The following has zero valency

Be

Kr

Al

Na

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

Sr > Ca

Br > Cl

P > Si

C > N

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

H₂O₂

O₂

CO₂

CO

82. Fluorine differs from other halogens due to

All

High dissociation energy

Small size

Low first ionization energy

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

Has the lowest ionization enthalpy

Has the highest heat of vaporization

Has the largest size

In the most readily available gas

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

K⁺

OH¯

O³¯

O₂¯²

85. Which of the following has highest dipole moment?

AsH₃

NH₃

SbH₃

PH₃

86. Which statement is true about IV A group

Marked change of properties

Abrupt change of properties

There is a regular gradation of properties from top to bottom

Whole group consist of non-metals

87. Variable valency is characteristic of

Alkali metals

Halogen

Noble gas

Transition elements

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

Strong acid and weak base

Strong acid and strong base

Weak acid and weak base

Weak acid and strong base

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

High ionization energy

Their ions are isoelectronic with noble gases

Low melting point

Low electronegativity

90. The type of hybridization of born in diborane is

Sp³d²-hybridisation

Sp-hybridisation

Sp³- hybridization

Sp²-hybridisation

91. Boron compounds behave as Lewis acid because of their

Acidic nature

Ionization property

Covalent nature

Electron deficiency

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

35.45 g

70.90 g

88.60 g

17.72 g

93. The alkali metals

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

Show increasing electro negativity from Li to Cs.

Form salts which are predominantly covalent

Form salt like hydrides

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

Lead

Sodium

Silver

Zinc

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

I

Cl

F

Br

96. Which statement is correct?

Noble gases are all dense gases

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

Noble gases will all burn in pure oxygen

None of these

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

All the halogens have electronic configuration ns2P5

All are non-metals

They have high electron affinity and ionization energy

All the halogens react with noble gases to form their halides

98. AlCl₃ flumes in moist air because

HCl is formed in moist air

It is covalent

It is very volatile

It is highly hygroscopic

99. Which of the following has greatest reducing power?

HBr

HCl

HI

100. NaOH is prepared by the method

Down’s cell

Solvay process

Castner cell

Castner Kellner cell

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

Chlorophyll

Florigen

ATP

Haemoglobin

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

Iron

Magnesium

Cobalt

Chromium

103. Which of the following is most volatile?

HF

HCl

HBr

HI

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

Br

F

I

Cl

105. Plaster of Paris is used

As a drying agent

As a plaster for walls

In metallurgical process

In dentistry and surgery

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

It changes into CaCl₂ and Ca(OH)₂

It absorbs moisture

It changes into calcium chloride and calcium chlorate

It change into calcium hypochlorate

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

Extremely high electropositivity of Li

Small size of lithium atom and Li⁺ ion

Hydration of Li⁺ ion

Greater hardness of Li

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

Copper

Iron

Zinc

Aluminum

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

Tri-calcium aluminate

Tetra calcium aluminoferrite

Diclacium silicate

Tri-calcium silicate

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

H₂O

O₂

Cl₂

H₂

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

Covalent

Ionic

Metallic

Coordinate

112. 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

113. In which form boron exist mostly in nature

Nitrides

Sulphides

Oxyborates

Oxides

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

I₂>F₂>Br₂>U₂

I₂>Br₂>U₂>F₂

U₂>Br₂>I₂>F₂

F₂>Cl₂>Br₂>I2

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

32

8

18

10

116. XeF₄ involves which hybridization

Sp²

Sp³d²

Sp²d

Sp

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

Astatine

Francium

Radium

Polonium

118. Pyrex glass is a mixture of

Sodium borosilicate and aluminum borosilicate

Sodium silicate and aluminum borosilicate

Sodium silicate and calcium silicate

Sodium silicate and lead silicate

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

2,8

2,8,2

2,8,18,2

2,8,7

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

Ionization energy

Atomic radius

N/P ratio

Electro negativity

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

Helium

Neon

Oxygen

Nitrogen

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

Ne

Xe

He

Ar

123. Mark the smallest atom

Br

Cl

I

F

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

Strong reducing agents

Weak oxidizing agents

Weak reducing agents

Strong oxidizing agents

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

Boiling point

Ionization energy

Density

Atomic radius

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126. The metal used for making radiation shield is

Fe

Al

Pb

Zn

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

Highly soluble in water

Less soluble in water

Variable trend

Insoluble in water

128. Strongest reducing agent is

HBr

Hl

HF

HCl

129. Which gas can support combustion?

CO

N₂O

CO₂

N₂

130. Orthophosphoric acid is

Tetrabasic

Monobasic

Dibasic

Tribasic

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

Smaller ionic radii

Greater hardness

Lower ionization energies

Highest boiling points

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

Fluoride ion

Nitride ion

Sodium ion

Chloride ion

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

Te

Po

Fe

Pb

134. Vander Waals forces are stronger in

Br₂

I₂

Cl₂

F₂

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

Atomic numbers

Atomic masses

Nuclear masses

Nuclear neutron-proton number rations

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

HU

HBr

HI

HF

137. Which of the following phosphorus is most reactive?

Violet phosphorus

Red phosphorus

White phosphorus

Scarlet phosphorus

138. Hydrochloric acid at 25°C is

Ionic and gas

Ionic and liquid

Covalent and liquid

None of these

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

Potassium only

Potassium and magnesium

Magnesium only

Magnesium and chlorine

140. Which halogen have most corrosive action on skin?

F₂

Chlorine

Br₂

I₂

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

Carbon

Boron

Oxygen

Nitrogen

142. 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

143. I₂ is solid at room temperature because

Its molecule has a large size

It possess hydrogen bonding

It has metallic bond

It is highly electronegative

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

Sodium atoms

Sodium hydride

Solvated electrons

Sodium amide

145. Common oxidation state of boron are

-3

+3,-3

+3

+1

146. Indicate the correct statement

Alkali metals do not reacts with metals

Alkali metals have ns’ configuring in outermost shells

Alkali metal atom has the smallest size in its period

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

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

Te

Po

None of these

Se

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

Barium

Beryllium

Calcium

Strontium

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

More electro negativity of fluorine

Non-metallic nature of fluorine

More electron repulsion in fluorine

Small size of fluorine

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

p-orbitals

s-orbitals

d-orbitals

None

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

S²¯

K⁺

Ca²⁺

Cl¯

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

C

Al

Be

Si

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

KCl

NaCl

CuSO₄

BaSO₄

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

Iron from haematite

Solvay process of sodium carbonate

Ordinary (soda lime) glass

Phosphorus from phosphorite

155. Which one has highest electron affinity?

I

F

Br

Cl

156. Crystalline form of sulphur stale at room temperature is

Rhombic sulphur

Plastic sulphur

Monoclinic sulphur

Prismatic sulphur

157. Nitrolim is

Ca(CN)₂ + C

CaC₂ + C

CaCN₂ + C

All

158. Which of the halogen has highest electronegativity?

Fluorine

Bromine

Iodine

Chlorine

159. SO3 is not dissolve directly in H2O because

The reaction is highly exothermic

The reaction is quite slow

The reaction does not go to completion

SO₃ is insoluble in H₂O

160. The important ore of lead is

Galena

Bauxite

Haematite

Chalcopyrites

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

Sr

Ba

Mg

Ca

162. The noble gases are

All of these

Monoatomic

Polyatomic

Diatomic

163. White enamel of our teeth is

Ca₃(PO₄)₂

CaBr₂

CaF₂

CaCl₂

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

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

Nitrogen is highly soluble in water

165. The ionization potential is lowest for the

Alkaline earth metals

Inert gases

Alkali metals

Halogens

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

He

H₂

O₂

Ar

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

Ar

Rn

Ne

He

168. 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

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

C

A

B

D

170. The acid which has a peroxy linkage is

Sulphurous acid

Dithionic acid

Carlo’s acid

Pyrosulphuric acid

171. The halogen which has only one oxidation state is

I

Cl

F

Br

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

Remains unchanged

Variation is not regular

Increases down the group

Decreases down the group

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

CaO

CaC₂

CaCO₃

Ca and CO₂

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

Lower electro positivity

Low charge density

Low electronegativity

None

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

Cl₂

I₂

Br₂

F₂

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176. Mark the nitrate which decomposes differently on heating

LiNO₃

RbNO₃

NaNO₃

KNO₃

177. 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

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

Calcium sulphates

Ferrous ammonium sulphate

Magnesium ammonium phosphate

Magnesium sulphates

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

Cl, Br

Na, Ca

Na, Cl

Ca, Cl

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

1000

400

250

200

181. The element that does not form a monoxide is

Germanium

Lead

Silicon

Tin

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

NaF

NaCl

NaBr

Nal

183. The substance not likely to contain CaCO₃ is

Sea shells

Dolomite

Calcried gypsum

A marble states

184. HNO₂ acts as an/a

Reducing agent

Oxidizing agent

Acid

All the three

185. Which halogen is most electropositive?

Cl

Br

I

F

186. Which one of these is most reactive?

Na

K

Pb

Mg

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

To act as reducing agent

To protect the anodes

To make a conducting solution of bauxite

To increase Al production

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

Atomic radius

Ionization energy

Boiling point

Density

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

Atomic number

Isotopic number

Atomic mass

Mass number

190. Which statement is correct about halogens?

They are all diatomic and form divalent ions

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 capable of exhibiting several oxidation states

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

Borazole is nonpolar compound

Borazole is polar compound

Borazole is electron deficient compound

Of localized electrons in it

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

MnS

BaSO₄

BaCO₃

ZnS

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

Increase in resistance with increase in temperature

Decrease in resistance with increase in temperature

Decease in resistance with intensity of light

Different resistance under different circumstance

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

Phosphorus trichloride

Nitrosyl chloride

Nitrogen trichloride

Hyponitrous acid

195. Alkali metals are generally extracted by

Double decomposition methods

Reduction methods

Displacement methods

Electrolytic methods

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

Ionization energy

Hydration energy

Electron affinity

Lattice energy

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

Ne

F

B

Li

198. Mark the correct statement

Basic carbonates of Mg and Cu are soluble in water

Carbonates of Ca, Ba, Sr are soluble in water

Carbonates of Na, K, NH₄ are soluble in water

Li₂CO₃ is soluble in water

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

½

5/2

2

1½

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

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

They contain only one electron in their outermost shell

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

Their ionization potential is less than that of other elements

Page 9 of 14

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

HF molecules form intermolecular H-bonds

Fluorine atom is smaller in size

Fluorine is highly reactive

HF is the weakest acid

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

Cl₂

H₂

Na

O₂

203. The percentage of lead in lead pencil is

Zero

80

20

70

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

CO₃ + H₂O → H₂CO₃

NaCl + NH₄HCO₃ → NaHCO₃ + NH₄Cl

NH₃ + H₂CO₃ → NH₄HCO₃

2NaOH + CO₂ → Na₂CO₃ + H₂O

205. Heavy water is obtained by

Simple distillation of water

Removing impurities of calcium and magnesium form water

Prolonged electrolysis of water

Dissolving heavy salt in water

206. The noble gas He was discovered by

Dorn

Rutherford

Chadwick

Frank land and Lockyer

207. The most powerful oxidizing agent among the halogens is

I₂

Br₂

F₂

Cl₂

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

16

10

14

11

209. The halogen that is most easily reduced is

Cl₂

I₂

Br₂

F₂

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

Aluminum and silicon

Gallium and Germanium

Proton and silicon

Iron and sulphur

211. An atom with high electro negativity has

Low electron affinity

Large size

High ionization potential

Low ionization potential

212. Cassiterite is an ore of

Sn

Ni

Sb

Mn

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

Gaseous nature

High polarisability

Inertness

Weak van der Waals forces between atoms

214. Which of the following is correct?

Magnallium is one alloy of Mg and zinc

Sodium reduces CO₂ to carbon

Magnesium reacts with cold water and liberates hydrogen

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

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

Electron affinity

High atomic number

Energy dissociation

Hydration energy

216. All the elements of oxygen family are

Metalloids

Non-metals

Radioactive

Polymorphic

217. Which of the following is most electronegative?

Lead

Carbon

Silicon

Tin

218. Which of the following is not isoelectronic?

O²¯

Mg²⁺

Na⁺

Cl¯

219. A clathrate may be defined as a

Liquid crystal

Mixture

Solid solution

Cage compound

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

Chromous chloride

Chromic chloride

None

Chromyl chloride

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

Na

Li⁺

H

He⁺

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

None of these

Dry air

Sun light

Moisture

223. Which of the following is acidic?

N₂O

BeO

HgO

SO₃

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

O₂ and He

O₂ and CO₂

CO₂ and Ar

O₂ and Ar

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

Al₂(OH)₄

Na₂Al(OH)₄

NaAlO₂

Na₃AlO₃

Page 10 of 14

226. Number of elements present in 5th period is

24

32

8

18

227. Which halogen has application in medicines mostly?

Br2

None

I₂

Cl₂

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

F

I

Br

Cl

229. Electron affinity depends on

Atomic size and nuclear charge both

Atomic size

Nuclear charge

Atomic number

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

Br > Cl > F

Cl > F > Br

F > Br > Cl

F > Cl > Br

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

M₂O₃

MO

M₂O

MO₂

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

Bromine

Iodine

Chlorine

Fluorine

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

I

Cl

F

Br

234. Deliquescence is a process in which a solid

Increases the water of crystallization

Loses water of crystallization

Absorbs moisture and remain solid

Absorbs moisture and turn into liquid

235. Which one is hygroscopic in nature?

HBr

HNO3

HCL

HUO4

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

It oxidizes lead sulphides

It oxidizes potassium iodide

It oxidizes mercury

It cannot act as a bleaching agent

237. Which is the most volatile compound?

HF

HBr

HCl

HI

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

High ∆H lattice

Small ionic size of Li⁺

High covalent nature

Low ∆H lattice

239. The last orbit of argon would have electrons

18

8

6

2

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

Mg⁺

Al⁺

Li⁺

Ne

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

Phosphorus

Mercury

Copper

Magnesium

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

37, 19, 3, 55

1, 12, 30, 4, 62

12, 20, 56, 88

9, 17, 35, 53

243. Mark the correct statement

Br is more reactive than Cl₂

Cl₂ is more insoluble in water

None of these

Iodine is a solid

244. Which of the noble gas has highest polarizabilities?

Ar

Kr

Xe

He

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

Sodium

Copper

Lead

Iron

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

Iodine

Chlorine

Fluorine

Bromine

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

Cu

Cs

Ba

Cr

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

Presence of NH₃

Reaction with CO₂

Reaction with brine solution

Reaction with NaOH

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

Light metals

Heavy metals

Halogens

Noble gases

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

Castner

Solvay

Haber

Chamber

Page 11 of 14

251. Which of the following oxides is peroxide?

BaO

Na₂O₂

Mn₂O

SO₂

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

Electron affinity

Energy dissociation

Hydration energy of ion

High atomic number

253. 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

254. Sulphuric acid has great affinity for water because

Acid decomposes water

It decomposes the acid

Acid forms hydrates with water

It hydrolyses the acid

255. Among the halogens the rare element is

Chlorine

Fluorine

Iodine

Astatine

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

Coal

Diamond

Graphite

Coke

257. Which one has least dissociation energy?

HCL

HI

HBr

HF

258. The most abundant inert gas in the atmosphere is

Ne

Ar

Kr

He

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

Heat of dissociation

Heat of hydration

Electron affinity

Ionization potential

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

HF

HCl

Hl

HBr

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

11%

33%

22%

44%

262. Who reported first noble gas?

Frank land

Cavendish

Ramsay

J.J Thomson

263. To a clear solution of compound (X) a solution of BaCl₂ is added and a heavy white precipitate is formed which does not dissolve in dilute HCl. The compound X is

A carbonate

A nitrate

A bromide

A sulphate

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

Radon

Neon

Xenon

Argon

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

Atomic mass increases

Additive electrons are accommodated in new electron level

Atomic number increases

Effective nuclear charge increases

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

Free electrons

Atoms of sodium and chlorine

Free ions

Free molecules

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

Bromine

Iodine

Fluorine

Chlorine

268. Neon glows in discharge tube as

Bluish

Radish

Greenish

Yellowish

269. Which one is the weakest oxyacid of chlorine?

HCIO₃

HCIO

HCIO₄

HCIO₂

270. Bromine is obtained on a commercial scale from

Carnallite

Common salt

Cryolite

Caliche

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

None of these

H. bonding

Dipole-dipole forces

Strongest vanderwaal’s force

272. Permonosulphuric acid is known as

Carlo’s acid

None of these

Sulphuric acid

Marshall’s acid

273. What is more true about alkali metals?

Both oxidizing and reducing agents

Reducing agents

Hydrolyzing agents

Oxidizing agents

274. The bleaching action of chlorine is due to

Reduction

Chlorination

Hydrogenation

Oxidation

275. Polyanion formation is maximum in

Oxygen

Sulphur

Nitrogen

Boron

Page 12 of 14

276. Which one halogen is radioactive?

Iodine

Chlorine

Astatine

Bromine

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

Fr

Rn

Lr

Ra

278. Freon-12 is used as a

Fungicide

Refrigerant

Insecticide

Herbicide

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

Argon

Neon

Helium

Krypton

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

Kr

Ar

Xe

Rn

281. The most acidic of the following compounds is

P₂O₃

As₂O₃

B₂O₃

Sb₂O₃

282. Which of the following is true for magnesium?

It is manufactured by electrolysis of aqueous magnesium chloride

It is more electropositive than sodium

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

It is a strong reducing agent

283. 6NaOH + Cl₂ → 5Nacl + Naclo₃ in this reaction chlorine is

Oxidized

Both oxidized and reduced

Reduced

No change

284. The structure of XeF₆

None of these

Pyramidal

Tetrahedral

Distorted octahedral

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

Sulphur dioxide

Carbon dioxide

Chlorine

Iodide

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

Tetrahedral, acidic

Angular, disc

Linear, basic

Linear acidic

287. The shape of gaseous SnCl₂ is

t-shaped

Tetrahedral

Linear

Angular

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

O > C > B > N

B > N > C > O

O > B > C > N

O > C > N > B

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

HE is used in producing very low temperatures

Half-life of Rn is only 3-8 days

Ar is used in electric bulbs

Ne is obtained during radioactive disintegration

290. 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-2, b-3, c-1, d-4

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

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

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

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

Al₂O₃

CO

NH₃

CO₂

292. Which gives green colour in fireworks?

Sodium

Barium

Calcium

Potassium

293. Among noble gases xenon gives compounds due to

Higher I-P

Zero electron affinity

Structure

Large size

294. 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

295. Which shows maximum catenation property?

Se

O

S

Te

296. 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

SnO₂

CaO

CO₂

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

Sodium amide

Sodium nitride

Sodium hydride

Sodium azide

298. The noble gases consist of

Diatomic molecules

Single free atoms

Triatomic molecules

Atoms linked by weak bonds

299. The melting point in lowest for

Be

Mg

Sr

Ca

300. Hypo is used in photography for

The colour of picture

Developing picture

The fixation of picture

Picture printed

Page 13 of 14

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

20

10

40

30

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

Strongly bond valence electrons

Large atomic size

Small ionic size

Metallic properties

303. Cl₂O₇ is best prepared by passing by

Hydrogen chloride over phosphorus pentoxide

Perchloric acid (CHIO₄) over hot silver oxide

Chlorine and oxygen over hot silver chlorate

Chlorine gas over hot HgO

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

Kl has high m.p.

Kl is soluble in benzene

CaO has high m.p.

Lattice energy of CaO is much higher than that of Kl

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

K

Cs

Na

Rb

306. The correct formula of Plaster of Paris is

CaSO₄. 1/2H₂O

CaSO₄.2H₂O

CaSO₄. 3H₂O

CaSO₄

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

Radium

Polonium

Francium

Astatine

308. Which noble gas is used earth quake prediction?

Ar

He

Kr

Rn

309. Oxygen shows oxidation states

-2, +2, +6

-2

+2, -2

+2, +4, +6

310. 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

Precipitate Mg

Have no effect

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

Active charcoal

Phosphorus pentoxidse

Anhydrous calcium chloride

Na₃PO₄

312. Sea weeds are important source of

Chlorine

Iodine

Iron

Bromine

313. Bond angle is minimum for

H₂S

H₂O

H₂Te

H₂Se

314. Which of the following statements is incorrect?

Sodium is the most abundant metallic element in sea water

Melting and boiling points of alkali metals decrease down the group

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

Ionic character of alkali metal halides decreases down the group

315. 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 first I.E

It has highest E.N

It restricts to oxidation state – 1 only

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

The ratio of their charge to size is nearly the same

Both have nearly the same size

Both are found together in nature

Both have similar electronic configurations

317. 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

318. Which one boric acid is stable one?

H₂B₄O₇

None of these

HBO₃

H₃BO₃

319. Which is valence shell configuration of halogens?

ns₂, nP₅

nS₂, nP₆

NS₂, nP₄

nS₂, nP₃

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

K

Li

Rb

Ba

321. The one which does not show variable valency is

Copper

Barium

Lead

Titanium

322. Electropositive character increase down the group due to

Decrease in I.P

All of these

Increase in atomic size of elements

Decrease in electronegativity of the elements

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

54

10

18

2

324. The halogen having highest electron affinity is

Chlorine

Fluorine

Iodine

Bromine

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

I

Br

F

Cl

Page 14 of 14

326. Which of the following is most electronegative?

Si

Sn

Pb

C

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

O₂+

None of these

O₂

O₂-

328. Identify the incorrect statement with respect to ozone.

Ozone is more reactive than dioxygen

Ozone is diamagnetic whereas dioxygen is paramagnetic

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

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

329. 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

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

Third

Fifth

Fourth

Sixth

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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