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Chemistry The Halogens And Noble Gases Online Mcqs Test

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Chemistry

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

O > C > N > B

O > B > C > N

B > N > C > O

O > C > B > N

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

Large atomic size

Small ionic size

Metallic properties

Strongly bond valence electrons

3. Which of the following is most electronegative?

Silicon

Lead

Carbon

Tin

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

Iodine

Chlorine

Bromine

Fluorine

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

Variable trend

Highly soluble in water

Less soluble in water

Insoluble in water

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

HCl

HF

HBr

Hl

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

Nitrogen

Helium

Oxygen

Neon

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

HF

HI

HBr

HU

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

Na

Rb

Cs

K

10. Which of the following is true for magnesium?

It is a strong reducing agent

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

It is manufactured by electrolysis of aqueous magnesium chloride

It is more electropositive than sodium

11. 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 nitrate

A sulphate

A bromide

A carbonate

12. Cl₂O₇ is best prepared by passing by

Perchloric acid (CHIO₄) over hot silver oxide

Chlorine and oxygen over hot silver chlorate

Hydrogen chloride over phosphorus pentoxide

Chlorine gas over hot HgO

13. Crystalline form of sulphur stale at room temperature is

Prismatic sulphur

Plastic sulphur

Rhombic sulphur

Monoclinic sulphur

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

Hydration energies of cations

Inter ionic attraction

Lattice energies if solids

Entropy of solution formation

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

Sodium

Lead

Zinc

Silver

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

Li

Cl

Mg

Rb

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

To increase Al production

To make a conducting solution of bauxite

To protect the anodes

To act as reducing agent

18. 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

19. Which of the noble gas has highest polarizabilities?

Kr

Xe

Ar

He

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

More electro negativity of fluorine

Non-metallic nature of fluorine

Small size of fluorine

More electron repulsion in fluorine

21. Mark the nitrate which decomposes differently on heating

KNO₃

RbNO₃

NaNO₃

LiNO₃

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

Sr

Ca

Ba

Mg

23. Which noble gas is used in labors?

Helium

Krypton

Argon

Neon

24. A clathrate may be defined as a

Liquid crystal

Mixture

Solid solution

Cage compound

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

Al₂(OH)₄

Na₃AlO₃

Na₂Al(OH)₄

NaAlO₂

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

Iodine

Bromine

Fluorine

Chlorine

27. Cassiterite is an ore of

Sn

Mn

Ni

Sb

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

33%

44%

22%

11%

29. Bond angle is minimum for

H₂O

H₂Se

H₂Te

H₂S

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

Cl₂

F₂

Br₂

I₂

31. XeF₄ on partial hydrolysis produces

XeOF₂

XeOF₄

XeO₃

XeF₂

32. The alkali metals

Form salt like hydrides

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

33. Which halogen have most corrosive action on skin?

Br₂

F₂

Chlorine

I₂

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

Li⁺

B³⁺

F¯

O²¯

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

Al

Be

C

Si

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

All the halogens react with noble gases to form their halides

All the halogens have electronic configuration ns2P5

All are non-metals

They have high electron affinity and ionization energy

37. Plaster of Paris is used

In metallurgical process

In dentistry and surgery

As a drying agent

As a plaster for walls

38. Which of the following has greatest reducing power?

HI

HCl

HI

HBr

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 has highest electronegativity

It is more reactive than other halogens

It restricts to oxidation state – 1 only

It has highest first ionization energy

40. Which of the following statements is incorrect?

Ionic character of alkali metal halides decreases down the group

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

Sodium is the most abundant metallic element in sea water

Melting and boiling points of alkali metals decrease down the group

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

Ar is used in electric bulbs

Ne is obtained during radioactive disintegration

Half-life of Rn is only 3-8 days

HE is used in producing very low temperatures

42. Neon glows in discharge tube as

Bluish

Yellowish

Radish

Greenish

43. 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 first ionization energy

Ionic character of the compound

The basic character of the oxides

44. Vander Waals forces are stronger in

I₂

F₂

Cl₂

Br₂

45. The melting point in lowest for

Ca

Mg

Be

Sr

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

32

10

18

8

47. 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

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

P > Si

Br > Cl

C > N

Sr > Ca

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

Lattice energy

Electron affinity

Ionization energy

Hydration energy

50. Which one is the weakest oxyacid of chlorine?

HCIO

HCIO₄

HCIO₃

HCIO₂

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

Dinitrogen tetraoxide

Nitrogen dioxide

Nitrous oxide

Nitric oxide

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

40

30

10

20

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

Leads to the dissolution of beryllium metal

Have no effect

Precipitate Mg

Precipitate Mg metal

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

Diamagnetic nature

High energies of hydration of M²⁺ in solution

High lattice energy of M²⁺ ions in the solid state

None of these of M²⁺ ions

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

Cl₂

H₂O

O₂

H₂

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

CO

NH₃

CO₂

Al₂O₃

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

Po

Se

None of these

Te

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

He⁺

Na

H

Li⁺

59. The percentage of lead in lead pencil is

Zero

20

80

70

60. Halogens exist in the form of

Diatomic molecules

Cannot be predicted

Various forms

Monoatomic molecules

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

Br₂

Cl₂

F₂

I₂

62. Which of the following has highest dipole moment?

PH₃

NH₃

AsH₃

SbH₃

63. The noble gases consist of

Diatomic molecules

Single free atoms

Triatomic molecules

Atoms linked by weak bonds

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

Lead nitrate

Mercuric oxide

Potassium chlorate

Manganese dioxide

65. Which halogen has application in medicines mostly?

Br2

I₂

None

Cl₂

66. Indicate the correct statement

Alkali metals do not reacts with metals

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

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

Dipole-dipole forces

Strongest vanderwaal’s force

None of these

H. bonding

68. Number of elements present in 5th period is

32

8

18

24

69. The most powerful oxidizing agent among the halogens is

Cl₂

Br₂

I₂

F₂

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

Electro negativity

Ionic radius

First ionization energy

Melting point

71. Strongest reducing agent is

Hl

HBr

HF

HCl

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

Haemoglobin

Florigen

ATP

Chlorophyll

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

Hydration of Li⁺ ion

Greater hardness of Li

Small size of lithium atom and Li⁺ ion

Extremely high electropositivity of Li

74. AlCl₃ flumes in moist air because

HCl is formed in moist air

It is covalent

It is highly hygroscopic

It is very volatile

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

Lattice energy solids

Hydration energies of cations

Inter – ionic attraction

Entropy of solution formation

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76. The bleaching action of chlorine is due to

Chlorination

Oxidation

Hydrogenation

Reduction

77. The structure of XeF₆

Tetrahedral

None of these

Pyramidal

Distorted octahedral

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

To prevent the action of water and salt

Prevent puncturing by under sea rock

Keep away the sharks

Mark the ship lighter

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

Neon

Helium

Krypton

Argon

80. Which is valence shell configuration of halogens?

nS₂, nP₃

ns₂, nP₅

NS₂, nP₄

nS₂, nP₆

81. Bromine is obtained on a commercial scale from

Common salt

Carnallite

Cryolite

Caliche

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

Gaseous nature

Weak van der Waals forces between atoms

High polarisability

Inertness

83. Oxygen shows oxidation states

-2

-2, +2, +6

+2, -2

+2, +4, +6

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

High ionization energy

Their ions are isoelectronic with noble gases

Low electronegativity

Low melting point

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

Sodium hydride

Sodium atoms

Sodium amide

Solvated electrons

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

Low charge density

Low electronegativity

Lower electro positivity

None

87. Sulphuric acid reacts with PCl₅ to give

Thionyl chloride

Sulphur monochloride

Sulphuryl chloride

Sulphur tetrachloride

88. What causes nitrogen to be chemically inert?

Multiple bond formation in the molecule

Short internuclear distance

Absence of bond polarity

High bond energy

89. Which of the following is most electronegative?

Sn

Pb

C

Si

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

CO

O₂

CO₂

H₂O₂

91. HNO₂ acts as an/a

Oxidizing agent

Acid

All the three

Reducing agent

92. Hydrochloric acid at 25°C is

Ionic and gas

None of these

Ionic and liquid

Covalent and liquid

93. Which one halogen is radioactive?

Chlorine

Iodine

Astatine

Bromine

94. 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.

Greater amount of nitrogen molecules derived from N¹⁵ isotope

Argon

Some nitrogen molecules analogous to O₂

CO₂

95. Boron compounds behave as Lewis acid because of their

Electron deficiency

Acidic nature

Ionization property

Covalent nature

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

Bauxite is available in large quantity

Of easy extraction of Al from it

Bauxite contains maximum of Al

Bauxite is less impure

97. 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.

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

None

s-orbitals

p-orbitals

d-orbitals

99. The substance not likely to contain CaCO₃ is

Dolomite

A marble states

Sea shells

Calcried gypsum

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

Hydration energy

Electron affinity

High atomic number

Energy dissociation

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101. 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-4, b-1, c-3, d-2

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

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

102. Hypo is used in photography for

The fixation of picture

The colour of picture

Developing picture

Picture printed

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

Ar

He

Rn

Ne

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

Ferromagnetic

Diamagnetic

Paramagnetic

Antiferromagnetic

105. Orthophosphoric acid is

Dibasic

Tribasic

Tetrabasic

Monobasic

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

Chlorine

Iodine

Fluorine

Bromine

107. The colour of I₂ in CCI₄ is

Colourless

Bluish green

Violet

Radish brown

108. P₂O₅ is heated with water to give

Orthophosphoric acid

Hypo phosphorous acid

Hypo phosphoric acid

Phosphorous acid

109. Variable valency is characteristic of

Noble gas

Alkali metals

Transition elements

Halogen

110. Which statement is correct?

Noble gases will all burn in pure oxygen

None of these

Noble gases are all dense gases

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

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

It decreases gradually down the group

None of these

Noble gases have o heat of vapourization

It increases gradually down the group

112. Identify the incorrect statement with respect to ozone.

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

Ozone is more reactive than dioxygen

Ozone is diamagnetic whereas dioxygen is paramagnetic

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

113. Permonosulphuric acid is known as

Carlo’s acid

None of these

Sulphuric acid

Marshall’s acid

114. Common oxidation state of boron are

+1

+3

-3

+3,-3

115. 6NaOH + Cl₂ → 5Nacl + Naclo₃ in this reaction chlorine is

No change

Reduced

Both oxidized and reduced

Oxidized

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

Atomic radius

Electro negativity

N/P ratio

Ionization energy

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

U₂>Br₂>I₂>F₂

I₂>F₂>Br₂>U₂

I₂>Br₂>U₂>F₂

F₂>Cl₂>Br₂>I2

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

7

14

16

12

119. Which shows maximum catenation property?

S

Se

Te

O

120. Which is the most volatile compound?

HBr

HCl

HF

HI

121. Which statement is correct about halogens?

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

They are all capable of exhibiting several oxidation states

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

HeF₄

SF₄

XeF₄

CF₄

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

Pb

Te

Po

Fe

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

Oxygen

Calcium oxide

Chlorine

Hypochlorous acid

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

S

Pb

Si

Fe

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

HBr

HCl

HF

HI

127. All the elements of oxygen family are

Metalloids

Polymorphic

Radioactive

Non-metals

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

B

Ne

F

Li

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

Sodium persulphate

Sodium sulphides

Sodium thiosulphate

Sodiums sulphates

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

NaCl

Chlorine

Ki

Iodine solution

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

Radium

Astatine

Francium

Polonium

132. Mark the smallest atom

Cl

I

Br

F

133. The element that does not form a monoxide is

Silicon

Tin

Lead

Germanium

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

Radium

Astatine

Francium

Polonium

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

Magnesium and chlorine

Potassium and magnesium

Magnesium only

Potassium only

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

Linear, basic

Angular, disc

Linear acidic

Tetrahedral, acidic

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

Cl

F

I

Br

138. SO3 is not dissolve directly in H2O because

The reaction is quite slow

The reaction does not go to completion

The reaction is highly exothermic

SO₃ is insoluble in H₂O

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

Both have nearly the same size

Both are found together in nature

The ratio of their charge to size is nearly the same

Both have similar electronic configurations

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

Ar

Rn

Kr

Xe

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

Has the highest heat of vaporization

Has the largest size

In the most readily available gas

Has the lowest ionization enthalpy

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

Atomic masses

Nuclear masses

Nuclear neutron-proton number rations

Atomic numbers

143. Which is the strongest acid?

HClO₂

HClO₃

HClO₄

HClO

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

Br

Cl

F

I

145. NaOH is prepared by the method

Castner Kellner cell

Solvay process

Castner cell

Down’s cell

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

Borax

Alum

Calomel

Gypsum

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

Atomic radius

Ionization energy

Boiling point

Density

148. Who reported first noble gas?

Frank land

J.J Thomson

Ramsay

Cavendish

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

NaCl

NaBr

Nal

NaF

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

High covalent nature

Small ionic size of Li⁺

Low ∆H lattice

High ∆H lattice

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

Cs

Cr

Ba

Cu

152. Electropositive character increase down the group due to

Decrease in I.P

Increase in atomic size of elements

Decrease in electronegativity of the elements

All of these

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

Decrease in resistance with increase in temperature

Increase in resistance with increase in temperature

Different resistance under different circumstance

Decease in resistance with intensity of light

154. Among the halogens the rare element is

Chlorine

Fluorine

Astatine

Iodine

155. 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

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

2

18

10

54

157. Electron affinity depends on

Nuclear charge

Atomic size and nuclear charge both

Atomic size

Atomic number

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

It is a gas at room temperature

It forms R₂O₃

It has oxidation state of +4

It forms RX₂

159. Sea weeds are important source of

Bromine

Iron

Iodine

Chlorine

160. The type of hybridization of born in diborane is

Sp³- hybridization

Sp³d²-hybridisation

Sp-hybridisation

Sp²-hybridisation

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

HBR

HCl

H₂S

SO₂

162. The ionization potential is lowest for the

Alkali metals

Halogens

Inert gases

Alkaline earth metals

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

Oxygen family

Halogens

Nitrogen family

Alkali metals

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

Hypo phosphorous acid

Orthophosphoric acid

Pyro phosphoric acid

Metaphosphoric acid

165. Because of its small size and due to restriction of its valence shell to an octet fluorine differs from other halogens, which behavior of fluorine is incorrect?

It has highest first I.E

It has highest E.N

It is more reactive than other halogens

It restricts to oxidation state – 1 only

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

M₂O₃

M₂O

MO

MO₂

167. Which of the following is most volatile?

HBr

HF

HCl

HI

168. The correct formula of Plaster of Paris is

CaSO₄. 3H₂O

CaSO₄.2H₂O

CaSO₄

CaSO₄. 1/2H₂O

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

It change into calcium hypochlorate

It changes into CaCl₂ and Ca(OH)₂

It absorbs moisture

It changes into calcium chloride and calcium chlorate

170. Alkaline earth metals comes under

Halogens

Inner transition elements

Representative elements

Transition elements

171. All halogen are

Oxidizing agents

Drying agents

Reducing agents

Oxidizing as well as reducing agents

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

Chromous chloride

Chromyl chloride

None

Chromic chloride

173. The halogen that is most easily reduced is

F₂

Br₂

I₂

Cl₂

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

Chlorine

Carbon dioxide

Sulphur dioxide

Iodide

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

Iron

Aluminum

Copper

Zinc

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176. Polyanion formation is maximum in

Oxygen

Sulphur

Nitrogen

Boron

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

Gallium and Germanium

Aluminum and silicon

Iron and sulphur

Proton and silicon

178. Identify the correct statement

Plaster of Pairs can be obtained by partial oxidation of gypsum

Gypsum contains a lower percentage of calcium than plaster of pairs

Gypsum is obtained by heating plaster of pairs

Plaster of Paris is obtained by partial oxidation of gypsum

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

I

Cl

Br

F

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

It oxidizes lead sulphides

It oxidizes mercury

It cannot act as a bleaching agent

It oxidizes potassium iodide

181. An atom with high electro negativity has

Low ionization potential

Large size

High ionization potential

Low electron affinity

182. Which statement is true about IV A group

Abrupt change of properties

Marked change of properties

Whole group consist of non-metals

There is a regular gradation of properties from top to bottom

183. Which one of these is most reactive?

Mg

Na

K

Pb

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

O³¯

O₂¯²

OH¯

K⁺

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

Sodium hydride

Sodium amide

Sodium azide

Sodium nitride

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

F > Br > Cl

F > Cl > Br

Cl > F > Br

Br > Cl > F

187. In which form boron exist mostly in nature

Oxyborates

Oxides

Nitrides

Sulphides

188. Electron affinity of sulphur is

Equal to O and Se

More than O but less than Se

Less than O but more than SE

More than O and Se

189. Which one is hygroscopic in nature?

HCL

HUO4

HBr

HNO3

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

Fifth

Third

Fourth

Sixth

191. Which of the following is correct?

Sodium reduces CO₂ to carbon

Magnesium reacts with cold water and liberates hydrogen

Magnallium is one alloy of Mg and zinc

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

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

Na

Fe

Mg

Al

193. Which one of them is monoatomic?

Oxygen

Fluorine

Nitrogen

Neon

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

He

Ne

Ar

Xe

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

C

P

N

Li

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

Mixture of neon and oxygen

Mixture of helium and oxygen

Mixture of argon and oxygen

Mixture of xenon and nitrogen

197. Which of the following is not isoelectronic?

Cl¯

O²¯

Na⁺

Mg²⁺

198. NaoH is named as caustic soda because

It reacts with fats to form soap

It corrodes the organic tissues

It is used in soda water

It reacts with chlorine gas

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

Density

Ionization energy

Boiling point

Atomic radius

200. Calico printing means

Leather printing

Glass printing

Paper printing

Cloth printing

Page 9 of 14

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

Dry air

Sun light

None of these

Moisture

202. The metal used for making radiation shield is

Al

Pb

Fe

Zn

203. The halogen having highest electron affinity is

Iodine

Bromine

Chlorine

Fluorine

204. I₂ is solid at room temperature because

It possess hydrogen bonding

It is highly electronegative

It has metallic bond

Its molecule has a large size

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

12, 20, 56, 88

37, 19, 3, 55

1, 12, 30, 4, 62

9, 17, 35, 53

206. The noble gases are

Diatomic

All of these

Monoatomic

Polyatomic

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

Silica

Magnesia

Iron oxide

Alumina

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

Cl¯

Ca²⁺

S²¯

K⁺

209. The noble gas forming the maximum number of compounds

Ar

Xe

He

Ne

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

Tri-calcium silicate

Diclacium silicate

Tetra calcium aluminoferrite

Tri-calcium aluminate

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

KCl

NaCl

BaSO₄

CuSO₄

212. 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

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

Reaction with CO₂

Presence of NH₃

Reaction with NaOH

Reaction with brine solution

214. Which of the halogen has highest electronegativity?

Fluorine

Iodine

Bromine

Chlorine

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

Lower ionization energies

Smaller ionic radii

Greater hardness

Highest boiling points

216. Which one has highest electron affinity?

Cl

I

F

Br

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

Borazole is electron deficient compound

Of localized electrons in it

Borazole is nonpolar compound

Borazole is polar compound

218. The one which does not show variable valency is

Titanium

Barium

Copper

Lead

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

Expense, but a very uncreative gas

Expensive but easy to store in cylinder

Less dense then air and not flammable

Lighter than air and cheap to produce

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

ZnS

BaSO₄

MnS

BaCO₃

221. Which noble gas is used earth quake prediction?

Rn

Ar

He

Kr

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

Mercury

Copper

Magnesium

Phosphorus

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

Br

U

F

O

224. The acid which has a peroxy linkage is

Carlo’s acid

Dithionic acid

Pyrosulphuric acid

Sulphurous acid

225. Which of the following is an inert gas?

Argon

O₂

H₂

N₂

Page 10 of 14

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

Covalent

Metallic

Coordinate

Ionic

227. The important ore of lead is

Galena

Haematite

Bauxite

Chalcopyrites

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

Noble gases

Halogens

Heavy metals

Light metals

229. The shape of gaseous SnCl₂ is

Tetrahedral

Linear

t-shaped

Angular

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

F

Cl

I

Br

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

Haber

Solvay

Castner

Chamber

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

Weak oxidizing agents

Weak reducing agents

Strong reducing agents

Strong oxidizing agents

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

Ca and CO₂

CaO

CaC₂

CaCO₃

234. Select the weakest acid among the following

HI

HF

HCl

HBr

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

Mass number

Isotopic number

Atomic number

Atomic mass

236. Mark the element which shows greatness inert pair effect

Iodine

Chlorine

Fluorine

Bromine

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

Bond energy of fluorine is less than that of chlorine

Electron affinity of chlorine is greater than that of fluorine

Fluorine does not form oxoacid

Fluorine cannot be prepared by electrolysis of fused metal fluorides

238. The following has zero valency

Al

Be

Kr

Na

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

XeF₆

XeF₂

XeF₃

XeF₄

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

Ba

Li

K

Rb

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

Lead

Copper

Iron

Sodium

242. Pyrex glass is a mixture of

Sodium silicate and aluminum borosilicate

Sodium borosilicate and aluminum borosilicate

Sodium silicate and calcium silicate

Sodium silicate and lead silicate

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

Li

N

He

Zn

244. XeF₄ involves which hybridization

Sp²d

Sp

Sp²

Sp³d²

245. White enamel of our teeth is

CaCl₂

CaF₂

Ca₃(PO₄)₂

CaBr₂

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

Decreases down the group

Remains unchanged

Increases down the group

Variation is not regular

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

Cl, Br

Ca, Cl

Na, Ca

Na, Cl

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

O₂

O₂+

O₂-

None of these

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

NH₃ + H₂CO₃ → NH₄HCO₃

CO₃ + H₂O → H₂CO₃

NaCl + NH₄HCO₃ → NaHCO₃ + NH₄Cl

2NaOH + CO₂ → Na₂CO₃ + H₂O

250. 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

Nitrogen is highly soluble in water

Nitrogen is much less soluble in blood than helium

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

Page 11 of 14

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

Na > Mg > Al > Si

Al > Mg > Na > Si

Si > Mg > Al > Na

Mg > Na > Al > Si

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

None of these

With alkali metals

With halogens

With inert gases

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

Fluorine atom is smaller in size

HF is the weakest acid

Fluorine is highly reactive

HF molecules form intermolecular H-bonds

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

Br

Cl

I

F

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

III group radicals are precipitated as hydroxides

IV group radicals are precipitated as sulphides

Of the oxidation of H₂S gas by some acid radicals

Sulphur is present in the mixture as impurity

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

P

As

Si

O

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

Hyponitrous acid

Nitrogen trichloride

Nitrosyl chloride

Phosphorus trichloride

258. Which one is the biggest ion?

Mg²⁺

Na⁺

Ba²⁺

Al³⁺

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

As salts in ponds

In sea

In lakes

In the atmosphere

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

F

Si

Al

Tl

261. Which of the following oxides is peroxide?

BaO

SO₂

Na₂O₂

Mn₂O

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

Reducing solubility of AgBr

Preventing overdeveloping and fogging

Converting silver halides to metallic silver

Dissolving out unreacted silver bromide

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

Converting sand into silici acid

Developing interlocking needle like crystals of hydrated silicates

Hydrating sand and gravel mixed with cement

Keeping it cool

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

Effective nuclear charge increases

Additive electrons are accommodated in new electron level

Atomic number increases

Atomic mass increases

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

Sodium hydride

Sodium atoms

Solvated electrons

Sodium amide

266. Mark the compound which does not exist

AsF₅

NCl₅

SbCl₅

PF₅

267. O²¯ has high ionic radius because the ionic radius of anion is greater than individual element. Which of the following oxides is amophteric in character?

SnO₂

SiO₂

CO₂

CaO

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

½

5/2

1½

2

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

Fr

Rn

Lr

Ra

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

I

S

F

Cl

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

10

16

11

14

272. Which gas can support combustion?

CO₂

N₂

N₂O

CO

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

Neon

Argon

Radon

Helium

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

Gain 2 electrons

Gain 3 electrons

Lose 3 electrons

Lose 2 electrons

275. The last orbit of argon would have electrons

6

8

18

2

Page 12 of 14

276. Fluorine differs from other halogens due to

All

Low first ionization energy

High dissociation energy

Small size

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

Atoms of sodium and chlorine

Free molecules

Free ions

Free electrons

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

Ordinary (soda lime) glass

Solvay process of sodium carbonate

Phosphorus from phosphorite

Iron from haematite

279. Which is the strongest acid

HNO3

HCL

Cannot be predicted

HCLO4

280. Aluminum (III) chloride forms a dimer because

It cannot form a trimer

Al has high ionization energy

Higher co-ordination can be achieved by Al

Al belongs to third group

281. Which gives green colour in fireworks?

Potassium

Calcium

Sodium

Barium

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

Phosphorus pentoxidse

Active charcoal

Anhydrous calcium chloride

Na₃PO₄

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

Argon

Radon

Xenon

Neon

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

Cl₂ > Br₂ > I₂ > F₂

I₂ > Br₂ > Cl₂ > F₂

F₂ > Cl₂ > Br₂ > I₂

Br₂ > Cl₂ > F₂ > I₂

285. Which halogen is most electropositive?

Cl

F

I

Br

286. Which one boric acid is stable one?

H₂B₄O₇

HBO₃

None of these

H₃BO₃

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

It is as filter for soap

It is used in the formation white cement

It is used as fire proof in textile

It is used furniture polish

288. Freon-12 is used as a

Fungicide

Insecticide

Herbicide

Refrigerant

289. Mark the correct statement

Carbonates of Na, K, NH₄ are soluble in water

Carbonates of Ca, Ba, Sr are soluble in water

Li₂CO₃ is soluble in water

Basic carbonates of Mg and Cu are soluble in water

290. 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

None of these

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

There is no change in the nuclear charge

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

Bromine

Fluorine

Iodine

Chlorine

292. Mark the incorrect statement about ‘Li’

‘Li’ is not effected by air

‘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

293. The name of CaSO₄. ½ H₂O is

Gypsum

Epsom salt

Dolomite

Plaster of Paris

294. Among noble gases xenon gives compounds due to

Zero electron affinity

Structure

Higher I-P

Large size

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

O₂

Cl₂

H₂

Na

296. Calcium is obtained by

Electrolysis of molten anhydrous or fused calcium chloride

Electrolysis of solution of calcium chloride in water

Reduction of calcium chloride with carbon

Roasting lime stone

297. Sulphuric acid has great affinity for water because

It hydrolyses the acid

It decomposes the acid

Acid forms hydrates with water

Acid decomposes water

298. 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

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

Three layers are maintained at different temperatures

Three layers have different densities

299. The most abundant inert gas in the atmosphere is

He

Ar

Kr

Ne

300. The noble gas He was discovered by

Dorn

Frank land and Lockyer

Rutherford

Chadwick

Page 13 of 14

301. The most acidic of the following compounds is

As₂O₃

B₂O₃

Sb₂O₃

P₂O₃

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

C

A

B

D

303. Which one has least dissociation energy?

HI

HBr

HF

HCL

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

1000

200

400

250

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

As an oxidizer in metallurgy

In form of foil for wrapping

For preparing artificial

As an abrasive in the form of abundum

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

Calcium oxide

Sodium bicarbonate

Sodium carbonate

Calcium carbonate

307. Nitrolim is

CaCN₂ + C

All

Ca(CN)₂ + C

CaC₂ + C

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

Fluoride ion

Nitride ion

Sodium ion

Chloride ion

309. Which of the following phosphorus is most reactive?

Scarlet phosphorus

Violet phosphorus

Red phosphorus

White phosphorus

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

He

Ar

H₂

O₂

311. Which of the following is acidic?

N₂O

HgO

SO₃

BeO

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

Beryllium

Barium

Strontium

Calcium

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

Coke

Graphite

Diamond

Coal

314. 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

10mL

200mL

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

Oxygen

Boron

Carbon

Nitrogen

316. Mark the correct statement

Iodine is a solid

Br is more reactive than Cl₂

Cl₂ is more insoluble in water

None of these

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

Magnesium ammonium phosphate

Ferrous ammonium sulphate

Calcium sulphates

Magnesium sulphates

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

Flint glass

Crooke’s glass

Borosilicate glass

Soda glass

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

Li⁺

Ne

Al⁺

Mg⁺

320. Heavy water is obtained by

Prolonged electrolysis of water

Simple distillation of water

Removing impurities of calcium and magnesium form water

Dissolving heavy salt in water

321. Identify the correct statement

Elemental Na is a strong oxidizing agent

Elemental Na is easily oxidized

Elemental Na is insoluble in NH₃

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

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

Electron affinity

High atomic number

Energy dissociation

Hydration energy of ion

323. Alkali metals are generally extracted by

Displacement methods

Reduction methods

Electrolytic methods

Double decomposition methods

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

O₂ and CO₂

O₂ and He

O₂ and Ar

CO₂ and Ar

325. The halogen which has only one oxidation state is

I

Cl

F

Br

Page 14 of 14

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

Iron

Magnesium

Chromium

Cobalt

327. 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 strong base

Weak acid and weak base

328. What is more true about alkali metals?

Reducing agents

Both oxidizing and reducing agents

Oxidizing agents

Hydrolyzing agents

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

2,8

2,8,7

2,8,18,2

2,8,2

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

Electron affinity

Heat of hydration

Ionization potential

Heat of dissociation

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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