Chemistry The Halogens And Noble Gases Online Mcqs Test

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Chemistry

1. Electron affinity of sulphur is

Less than O but more than SE

Equal to O and Se

More than O but less than Se

More than O and Se

2. Which gas can support combustion?

N₂O

N₂

CO₂

CO

3. 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

4. All halogen are

Drying agents

Oxidizing as well as reducing agents

Reducing agents

Oxidizing agents

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

He

Xe

Ar

Ne

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

High ionization energy

Low melting point

Low electronegativity

Their ions are isoelectronic with noble gases

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

Flint glass

Crooke’s glass

Borosilicate glass

Soda glass

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

HF is the weakest acid

Fluorine is highly reactive

Fluorine atom is smaller in size

HF molecules form intermolecular H-bonds

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

It has highest E.N

It is more reactive than other halogens

It has highest first I.E

It restricts to oxidation state – 1 only

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

NaCl

Nal

NaBr

NaF

11. Identify the incorrect statement with respect to ozone.

Ozone is more reactive than dioxygen

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

Ozone is diamagnetic whereas dioxygen is paramagnetic

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

12. Which one boric acid is stable one?

H₂B₄O₇

H₃BO₃

HBO₃

None of these

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

High atomic number

Energy dissociation

Hydration energy

Electron affinity

14. 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

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

Beryllium

Barium

Calcium

Strontium

16. The important ore of lead is

Bauxite

Galena

Haematite

Chalcopyrites

17. Identify the correct statement

Elemental Na is easily oxidized

Elemental Na is a strong oxidizing agent

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

Elemental Na is insoluble in NH₃

18. 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

19. Orthophosphoric acid is

Dibasic

Tetrabasic

Monobasic

Tribasic

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

C

N

P

Li

21. The halogen having highest electron affinity is

Chlorine

Bromine

Fluorine

Iodine

22. Sulphuric acid has great affinity for water because

It decomposes the acid

It hydrolyses the acid

Acid decomposes water

Acid forms hydrates with water

23. Which of the following is correct?

Magnesium reacts with cold water and liberates hydrogen

Magnallium is one alloy of Mg and zinc

Sodium reduces CO₂ to carbon

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

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

Coal

Coke

Diamond

Graphite

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

They contain only one electron in their outermost shell

Their ionization potential is less than that of other elements

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

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

O₂+

None of these

O₂-

O₂

27. The shape of gaseous SnCl₂ is

t-shaped

Linear

Tetrahedral

Angular

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

Strong acid and strong base

Strong acid and weak base

Weak acid and strong base

Weak acid and weak base

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

Preventing overdeveloping and fogging

Converting silver halides to metallic silver

Dissolving out unreacted silver bromide

Reducing solubility of AgBr

30. 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 capable of exhibiting several oxidation states

They are all diatomic and form divalent ions

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

Na

H

He⁺

Li⁺

32. The acid which has a peroxy linkage is

Dithionic acid

Pyrosulphuric acid

Carlo’s acid

Sulphurous acid

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

Sodium persulphate

Sodium sulphides

Sodiums sulphates

Sodium thiosulphate

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

Less soluble in water

Highly soluble in water

Insoluble in water

Variable trend

35. Fluorine differs from other halogens due to

High dissociation energy

Low first ionization energy

Small size

All

36. The halogen which has only one oxidation state is

Cl

F

I

Br

37. Electron affinity depends on

Atomic number

Atomic size and nuclear charge both

Atomic size

Nuclear charge

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

Both have similar electronic configurations

The ratio of their charge to size is nearly the same

Both have nearly the same size

Both are found together in nature

39. HNO₂ acts as an/a

Oxidizing agent

All the three

Acid

Reducing agent

40. Plaster of Paris is used

As a drying agent

In dentistry and surgery

As a plaster for walls

In metallurgical process

41. Cl₂O₇ is best prepared by passing by

Chlorine gas over hot HgO

Chlorine and oxygen over hot silver chlorate

Hydrogen chloride over phosphorus pentoxide

Perchloric acid (CHIO₄) over hot silver oxide

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

It oxidizes potassium iodide

It cannot act as a bleaching agent

It oxidizes lead sulphides

It oxidizes mercury

43. What is more true about alkali metals?

Hydrolyzing agents

Reducing agents

Oxidizing agents

Both oxidizing and reducing agents

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

Effective nuclear charge increases

Atomic mass increases

Additive electrons are accommodated in new electron level

Atomic number increases

45. Mark the element which shows greatness inert pair effect

Bromine

Chlorine

Iodine

Fluorine

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

Hypochlorous acid

Chlorine

Oxygen

Calcium oxide

47. Mark the compound which does not exist

PF₅

NCl₅

SbCl₅

AsF₅

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

Oxygen

Helium

Nitrogen

Neon

49. The last orbit of argon would have electrons

6

8

2

18

50. Which of the following is most electronegative?

Pb

Si

C

Sn

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

Fourth

Fifth

Sixth

Third

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

Mixture of neon and oxygen

Mixture of xenon and nitrogen

Mixture of argon and oxygen

Mixture of helium and oxygen

53. The substance not likely to contain CaCO₃ is

Calcried gypsum

Sea shells

A marble states

Dolomite

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

Sodium amide

Solvated electrons

Sodium hydride

Sodium atoms

55. 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 increase in the nuclear charge of the alkaline earth metals

None of these

There is no change in the nuclear charge

56. The halogen that is most easily reduced is

F₂

Cl₂

I₂

Br₂

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 following statements is not correct for a noble gas?

Ne is obtained during radioactive disintegration

Half-life of Rn is only 3-8 days

Ar is used in electric bulbs

HE is used in producing very low temperatures

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

Chlorine

Fluorine

Iodine

Bromine

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

O > C > N > B

O > C > B > N

B > N > C > O

O > B > C > N

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

NaCl + NH₄HCO₃ → NaHCO₃ + NH₄Cl

2NaOH + CO₂ → Na₂CO₃ + H₂O

NH₃ + H₂CO₃ → NH₄HCO₃

CO₃ + H₂O → H₂CO₃

62. Which is the strongest acid?

HClO₄

HClO

HClO₃

HClO₂

63. Mark the nitrate which decomposes differently on heating

NaNO₃

RbNO₃

LiNO₃

KNO₃

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

Lower electro positivity

Low electronegativity

None

Low charge density

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

Iodide

Sulphur dioxide

Chlorine

Carbon dioxide

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

17.72 g

35.45 g

70.90 g

88.60 g

67. Which one has least dissociation energy?

HCL

HBr

HF

HI

68. Permonosulphuric acid is known as

Sulphuric acid

Carlo’s acid

Marshall’s acid

None of these

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

Cl

Br

F

I

70. The one which does not show variable valency is

Lead

Copper

Barium

Titanium

71. The correct formula of Plaster of Paris is

CaSO₄. 1/2H₂O

CaSO₄

CaSO₄.2H₂O

CaSO₄. 3H₂O

72. Which of the following phosphorus is most reactive?

Scarlet phosphorus

Red phosphorus

Violet phosphorus

White phosphorus

73. Which statement is correct?

None of these

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

Noble gases are all dense gases

Noble gases will all burn in pure oxygen

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

Haber

Castner

Solvay

Chamber

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

Zinc

Iron

Copper

Aluminum

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

Presence of NH₃

Reaction with NaOH

Reaction with CO₂

Reaction with brine solution

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

Magnesium only

Magnesium and chlorine

Potassium and magnesium

Potassium only

78. Identify the correct statement

Gypsum contains a lower percentage of calcium than plaster of pairs

Plaster of Paris is obtained by partial oxidation of gypsum

Plaster of Pairs can be obtained by partial oxidation of gypsum

Gypsum is obtained by heating plaster of pairs

79. The name of CaSO₄. ½ H₂O is

Gypsum

Plaster of Paris

Epsom salt

Dolomite

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

With inert gases

With alkali metals

With halogens

None of these

81. Calico printing means

Paper printing

Glass printing

Leather printing

Cloth printing

82. NaOH is prepared by the method

Castner cell

Castner Kellner cell

Down’s cell

Solvay process

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

Paramagnetic

Ferromagnetic

Diamagnetic

Antiferromagnetic

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

Electron affinity

Hydration energy of ion

High atomic number

Energy dissociation

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

Lead

Sodium

Copper

Iron

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

Nitrogen trichloride

Phosphorus trichloride

Hyponitrous acid

Nitrosyl chloride

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

I

Cl

Br

F

88. Electropositive character increase down the group due to

Increase in atomic size of elements

Decrease in electronegativity of the elements

All of these

Decrease in I.P

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

Noble gases have o heat of vapourization

It decreases gradually down the group

It increases gradually down the group

None of these

90. SO3 is not dissolve directly in H2O because

SO₃ is insoluble in H₂O

The reaction does not go to completion

The reaction is highly exothermic

The reaction is quite slow

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

F

B

Ne

Li

92. Which one is hygroscopic in nature?

HCL

HUO4

HBr

HNO3

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

HCl

HF

Hl

HBr

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

Halogens

Nitrogen family

Alkali metals

Oxygen family

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

Al

Be

C

Si

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

As an abrasive in the form of abundum

In form of foil for wrapping

As an oxidizer in metallurgy

For preparing artificial

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

Atomic number

Isotopic number

Mass number

Atomic mass

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

Dry air

None of these

Moisture

Sun light

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

Cl > F > Br

F > Cl > Br

Br > Cl > F

F > Br > Cl

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

In the most readily available gas

Has the highest heat of vaporization

Has the largest size

Has the lowest ionization enthalpy

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

Entropy of solution formation

Inter ionic attraction

Hydration energies of cations

Lattice energies if solids

102. Which one of these is most reactive?

Na

Mg

Pb

K

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

I₂>F₂>Br₂>U₂

I₂>Br₂>U₂>F₂

F₂>Cl₂>Br₂>I2

U₂>Br₂>I₂>F₂

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

The first ionization energy

The basic character of the oxides

The stability of +2 oxidation state

Ionic character of the compound

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

Silica

Magnesia

Iron oxide

Alumina

106. Which halogen is most electropositive?

F

Br

I

Cl

107. Which of the following is acidic?

N₂O

HgO

BeO

SO₃

108. Which one of them is monoatomic?

Oxygen

Neon

Fluorine

Nitrogen

109. The noble gas forming the maximum number of compounds

Ne

Xe

Ar

He

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

Prevent puncturing by under sea rock

Mark the ship lighter

To prevent the action of water and salt

Keep away the sharks

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

Ionic radius

Electro negativity

First ionization energy

Melting point

112. Nitrolim is

CaCN₂ + C

Ca(CN)₂ + C

CaC₂ + C

All

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

Lose 3 electrons

Lose 2 electrons

Gain 3 electrons

Gain 2 electrons

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

Of easy extraction of Al from it

Bauxite contains maximum of Al

Bauxite is less impure

Bauxite is available in large quantity

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

Fluoride ion

Sodium ion

Nitride ion

Chloride ion

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

Li

K

Rb

Ba

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

CO₂

CO

O₂

H₂O₂

118. Hydrochloric acid at 25°C is

Ionic and liquid

None of these

Covalent and liquid

Ionic and gas

119. 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

120. NaoH is named as caustic soda because

It corrodes the organic tissues

It reacts with fats to form soap

It is used in soda water

It reacts with chlorine gas

121. 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

Melting and boiling points of alkali metals decrease down the group

Sodium is the most abundant metallic element in sea water

122. 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 first ionization energy

It is more reactive than other halogens

It restricts to oxidation state – 1 only

It has highest electronegativity

123. 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

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

Chlorine

Iodine

Fluorine

Bromine

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

Po

Te

Se

None of these

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126. Which gives green colour in fireworks?

Sodium

Potassium

Barium

Calcium

127. Sea weeds are important source of

Iron

Bromine

Iodine

Chlorine

128. Boron compounds behave as Lewis acid because of their

Covalent nature

Ionization property

Electron deficiency

Acidic nature

129. Mark the smallest atom

Br

F

I

Cl

130. Aluminum (III) chloride forms a dimer because

It cannot form a trimer

Al has high ionization energy

Al belongs to third group

Higher co-ordination can be achieved by Al

131. The noble gas He was discovered by

Frank land and Lockyer

Dorn

Rutherford

Chadwick

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

Ar

Rn

Kr

Xe

133. Which statement is true about IV A group

Whole group consist of non-metals

Marked change of properties

There is a regular gradation of properties from top to bottom

Abrupt change of properties

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

Rn

Ar

Ne

He

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

Fe

Te

Po

Pb

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

Phosphorus from phosphorite

Ordinary (soda lime) glass

Iron from haematite

Solvay process of sodium carbonate

137. Which of the following is not isoelectronic?

Mg²⁺

Na⁺

Cl¯

O²¯

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

Cl

Rb

Li

Mg

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

Tl

Si

Al

F

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

High ∆H lattice

High covalent nature

Low ∆H lattice

Small ionic size of Li⁺

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

Coordinate

Metallic

Ionic

Covalent

142. Which of the following has highest dipole moment?

PH₃

NH₃

SbH₃

AsH₃

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

Cl, Br

Na, Cl

Ca, Cl

Na, Ca

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

Ionization energy

Hydration energy

Lattice energy

Electron affinity

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

Variation is not regular

Decreases down the group

Remains unchanged

Increases down the group

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

None

Chromyl chloride

Chromic chloride

Chromous chloride

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

Copper

Mercury

Magnesium

Phosphorus

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

Inter – ionic attraction

Hydration energies of cations

Entropy of solution formation

Lattice energy solids

149. Indicate the correct statement

Alkali metals do not reacts with metals

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

Alkali metals have ns’ configuring in outermost shells

Alkali metal atom has the smallest size in its period

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

Density

Ionization energy

Atomic radius

Boiling point

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

Neon

Krypton

Helium

Argon

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

Mg

Sr

Ca

Ba

153. Which of the following has greatest reducing power?

HCl

HI

HBr

HI

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

Calomel

Alum

Borax

Gypsum

155. The noble gases are

All of these

Monoatomic

Polyatomic

Diatomic

156. P₂O₅ is heated with water to give

Orthophosphoric acid

Phosphorous acid

Hypo phosphoric acid

Hypo phosphorous acid

157. Halogens exist in the form of

Monoatomic molecules

Cannot be predicted

Various forms

Diatomic molecules

158. Sulphuric acid reacts with PCl₅ to give

Thionyl chloride

Sulphuryl chloride

Sulphur tetrachloride

Sulphur monochloride

159. 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

There is special arrangement is cell to keep the layers separate

Three layers are maintained at different temperatures

160. Which noble gas is used in labors?

Helium

Neon

Argon

Krypton

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

Calcium carbonate

Sodium carbonate

Calcium oxide

Sodium bicarbonate

162. In which form boron exist mostly in nature

Oxides

Oxyborates

Nitrides

Sulphides

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

Metaphosphoric acid

Pyro phosphoric acid

Orthophosphoric acid

Hypo phosphorous acid

164. The noble gases consist of

Atoms linked by weak bonds

Single free atoms

Triatomic molecules

Diatomic molecules

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

Lr

Ra

Rn

Fr

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

250

200

400

1000

167. What causes nitrogen to be chemically inert?

Multiple bond formation in the molecule

Short internuclear distance

High bond energy

Absence of bond polarity

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

Na

Fe

Al

Mg

169. Which is the most volatile compound?

HCl

HI

HF

HBr

170. 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

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

P

As

O

Si

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

F

I

Cl

Br

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

Ferrous ammonium sulphate

Calcium sulphates

Magnesium ammonium phosphate

Magnesium sulphates

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

O₂

He

Ar

H₂

175. Alkaline earth metals comes under

Inner transition elements

Transition elements

Representative elements

Halogens

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

s-orbitals

d-orbitals

p-orbitals

None

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

Carbon

Oxygen

Nitrogen

Boron

178. Which of the noble gas has highest polarizabilities?

Ar

He

Xe

Kr

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

Nuclear neutron-proton number rations

Atomic numbers

Nuclear masses

Atomic masses

180. Which of the halogen has highest electronegativity?

Chlorine

Bromine

Fluorine

Iodine

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

Al⁺

Li⁺

Mg⁺

Ne

182. Which of the following oxides is peroxide?

Na₂O₂

SO₂

Mn₂O

BaO

183. Mark the correct statement

Iodine is a solid

Br is more reactive than Cl₂

None of these

Cl₂ is more insoluble in water

184. The metal used for making radiation shield is

Fe

Pb

Zn

Al

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

2,8

2,8,2

2,8,7

2,8,18,2

186. Number of elements present in 5th period is

8

24

32

18

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

HBR

H₂S

HCl

SO₂

188. 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

Decease in resistance with intensity of light

Different resistance under different circumstance

Increase in resistance with increase in temperature

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

Have no effect

Precipitate Mg metal

Precipitate Mg

Leads to the dissolution of beryllium metal

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

Ca and CO₂

CaO

CaCO₃

CaC₂

191. The percentage of lead in lead pencil is

80

70

Zero

20

192. Which one is the weakest oxyacid of chlorine?

HCIO₃

HCIO₄

HCIO

HCIO₂

193. Cassiterite is an ore of

Ni

Sn

Mn

Sb

194. Polyanion formation is maximum in

Sulphur

Oxygen

Nitrogen

Boron

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

Hydration of Li⁺ ion

Extremely high electropositivity of Li

Small size of lithium atom and Li⁺ ion

Greater hardness of Li

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

Si

Pb

Fe

S

197. The ionization potential is lowest for the

Alkali metals

Inert gases

Halogens

Alkaline earth metals

198. Select the weakest acid among the following

HI

HCl

HBr

HF

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

C > N

P > Si

Br > Cl

Sr > Ca

200. Which noble gas is used earth quake prediction?

Rn

He

Kr

Ar

Page 9 of 14

201. The element that does not form a monoxide is

Tin

Lead

Germanium

Silicon

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

F₂

Cl₂

Br₂

I₂

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

NaCl

Chlorine

Ki

Iodine solution

204. The melting point in lowest for

Mg

Sr

Ca

Be

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

Light metals

Noble gases

Halogens

Heavy metals

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

16

14

7

12

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

Chromium

Cobalt

Magnesium

Iron

208. Hypo is used in photography for

Picture printed

The fixation of picture

Developing picture

The colour of picture

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

M₂O₃

MO₂

M₂O

MO

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

Cr

Ba

Cs

Cu

211. Which of the following is true for magnesium?

It is manufactured by electrolysis of aqueous magnesium chloride

It is a strong reducing agent

It is more electropositive than sodium

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

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

CuSO₄

NaCl

BaSO₄

KCl

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

Br

I

Cl

F

214. 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-3, b-1, c-4, d-2

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

215. If one liter of air is passed repeatedly over heated copper and magnesium till no further reduction in volume takes place, the volume finally obtained would be approximately

10mL

800 mL

Zero

200mL

216. White enamel of our teeth is

CaCl₂

Ca₃(PO₄)₂

CaF₂

CaBr₂

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

Highest boiling points

Greater hardness

Lower ionization energies

Smaller ionic radii

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

Kl has high m.p.

Lattice energy of CaO is much higher than that of Kl

CaO has high m.p.

Kl is soluble in benzene

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

Iron and sulphur

Gallium and Germanium

Aluminum and silicon

Proton and silicon

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

Polonium

Francium

Radium

Astatine

221. Which one is the biggest ion?

Ba²⁺

Na⁺

Mg²⁺

Al³⁺

222. 6NaOH + Cl₂ → 5Nacl + Naclo₃ in this reaction chlorine is

No change

Both oxidized and reduced

Reduced

Oxidized

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

OH¯

O₂¯²

O³¯

K⁺

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

Neon

Argon

Radon

Xenon

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

Helium

Neon

Radon

Argon

Page 10 of 14

226. Crystalline form of sulphur stale at room temperature is

Prismatic sulphur

Plastic sulphur

Monoclinic sulphur

Rhombic sulphur

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

H₂

O₂

Cl₂

Na

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

Sodium

Silver

Zinc

Lead

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

2

54

18

10

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

A bromide

A sulphate

A carbonate

A nitrate

231. Alkali metals are generally extracted by

Displacement methods

Electrolytic methods

Reduction methods

Double decomposition methods

232. The following has zero valency

Be

Kr

Al

Na

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

It changes into CaCl₂ and Ca(OH)₂

It absorbs moisture

It change into calcium hypochlorate

It changes into calcium chloride and calcium chlorate

234. Which of the following is most volatile?

HF

HBr

HI

HCl

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

O₂ and He

CO₂ and Ar

O₂ and CO₂

O₂ and Ar

236. Which halogen have most corrosive action on skin?

F₂

I₂

Br₂

Chlorine

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

High energies of hydration of M²⁺ in solution

Diamagnetic nature

High lattice energy of M²⁺ ions in the solid state

None of these of M²⁺ ions

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

CF₄

HeF₄

SF₄

XeF₄

239. Which of the following is most electronegative?

Carbon

Silicon

Lead

Tin

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

Florigen

ATP

Chlorophyll

Haemoglobin

241. The most powerful oxidizing agent among the halogens is

Cl₂

F₂

Br₂

I₂

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

Linear, basic

Linear acidic

Tetrahedral, acidic

Angular, disc

243. Variable valency is characteristic of

Alkali metals

Noble gas

Transition elements

Halogen

244. Which is the strongest acid

HCLO4

HCL

Cannot be predicted

HNO3

245. Oxygen shows oxidation states

-2, +2, +6

-2

+2, -2

+2, +4, +6

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

C

D

A

B

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

Converting sand into silici acid

Keeping it cool

Hydrating sand and gravel mixed with cement

Developing interlocking needle like crystals of hydrated silicates

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

Al > Mg > Na > Si

Na > Mg > Al > Si

Si > Mg > Al > Na

Mg > Na > Al > Si

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

O₂

H₂

H₂O

Cl₂

250. Common oxidation state of boron are

+1

+3,-3

+3

-3

Page 11 of 14

251. 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

252. Pyrex glass is a mixture of

Sodium silicate and aluminum borosilicate

Sodium borosilicate and aluminum borosilicate

Sodium silicate and lead silicate

Sodium silicate and calcium silicate

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

Cl

I

F

S

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

None of these

Strongest vanderwaal’s force

H. bonding

Dipole-dipole forces

255. Who reported first noble gas?

J.J Thomson

Cavendish

Frank land

Ramsay

256. AlCl₃ flumes in moist air because

HCl is formed in moist air

It is very volatile

It is covalent

It is highly hygroscopic

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

He

Li

N

Zn

258. 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

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

30

20

40

10

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

Cl¯

K⁺

Ca²⁺

S²¯

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

All the halogens react with noble gases to form their halides

All are non-metals

All the halogens have electronic configuration ns2P5

They have high electron affinity and ionization energy

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

Solvated electrons

Sodium hydride

Sodium amide

Sodium atoms

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

It is a gas at room temperature

It forms RX₂

It forms R₂O₃

It has oxidation state of +4

264. A clathrate may be defined as a

Solid solution

Mixture

Cage compound

Liquid crystal

265. The type of hybridization of born in diborane is

Sp³- hybridization

Sp³d²-hybridisation

Sp-hybridisation

Sp²-hybridisation

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

Astatine

Francium

Radium

Polonium

267. XeF₄ involves which hybridization

Sp²d

Sp²

Sp

Sp³d²

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

XeF₃

XeF₂

XeF₆

XeF₄

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

Tetra calcium aluminoferrite

Diclacium silicate

Tri-calcium aluminate

Tri-calcium silicate

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

Chlorine

Fluorine

Iodine

Bromine

271. Which is valence shell configuration of halogens?

ns₂, nP₅

nS₂, nP₃

NS₂, nP₄

nS₂, nP₆

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

1, 12, 30, 4, 62

37, 19, 3, 55

9, 17, 35, 53

12, 20, 56, 88

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

Heat of dissociation

Electron affinity

Ionization potential

Heat of hydration

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

11%

22%

44%

33%

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

½

2

1½

5/2

Page 12 of 14

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

Atomic radius

Density

Boiling point

Ionization energy

277. Among the halogens the rare element is

Chlorine

Astatine

Fluorine

Iodine

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

Sodium amide

Sodium hydride

Sodium azide

Sodium nitride

279. Vander Waals forces are stronger in

I₂

Cl₂

F₂

Br₂

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

Lead nitrate

Mercuric oxide

Manganese dioxide

Potassium chlorate

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

I₂

F₂

Cl₂

Br₂

282. 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

283. Neon glows in discharge tube as

Radish

Bluish

Greenish

Yellowish

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

11

14

16

10

285. The most acidic of the following compounds is

Sb₂O₃

B₂O₃

As₂O₃

P₂O₃

286. Which one has highest electron affinity?

Cl

I

Br

F

287. The structure of XeF₆

Tetrahedral

Distorted octahedral

None of these

Pyramidal

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

Free electrons

Free ions

Atoms of sodium and chlorine

Free molecules

289. Bond angle is minimum for

H₂Te

H₂Se

H₂O

H₂S

290. The colour of I₂ in CCI₄ is

Violet

Colourless

Bluish green

Radish brown

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

Fluorine

Bromine

Iodine

Chlorine

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

HF

HI

HBr

HCl

293. The bleaching action of chlorine is due to

Reduction

Chlorination

Hydrogenation

Oxidation

294. Which of the following is an inert gas?

Argon

H₂

O₂

N₂

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

NH₃

CO

Al₂O₃

CO₂

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

HF

HI

HU

HBr

297. 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

298. Deliquescence is a process in which a solid

Absorbs moisture and turn into liquid

Loses water of crystallization

Increases the water of crystallization

Absorbs moisture and remain solid

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

Some nitrogen molecules analogous to O₂

CO₂

Argon

Greater amount of nitrogen molecules derived from N¹⁵ isotope

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

It is used furniture polish

It is as filter for soap

It is used in the formation white cement

It is used as fire proof in textile

Page 13 of 14

301. Which one halogen is radioactive?

Chlorine

Astatine

Bromine

Iodine

302. All the elements of oxygen family are

Radioactive

Polymorphic

Metalloids

Non-metals

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

Small ionic size

Strongly bond valence electrons

Large atomic size

Metallic properties

304. Which shows maximum catenation property?

Se

O

Te

S

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

BaCO₃

MnS

ZnS

BaSO₄

306. Heavy water is obtained by

Removing impurities of calcium and magnesium form water

Simple distillation of water

Prolonged electrolysis of water

Dissolving heavy salt in water

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

Nitric oxide

Nitrogen dioxide

Dinitrogen tetraoxide

Nitrous oxide

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

Inertness

Gaseous nature

High polarisability

Weak van der Waals forces between atoms

309. The most abundant inert gas in the atmosphere is

He

Ne

Ar

Kr

310. Strongest reducing agent is

HCl

Hl

HF

HBr

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

As salts in ponds

In the atmosphere

In lakes

In sea

312. Calcium is obtained by

Reduction of calcium chloride with carbon

Roasting lime stone

Electrolysis of solution of calcium chloride in water

Electrolysis of molten anhydrous or fused calcium chloride

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

Fluorine does not form oxoacid

Electron affinity of chlorine is greater than that of fluorine

Bond energy of fluorine is less than that of chlorine

Fluorine cannot be prepared by electrolysis of fused metal fluorides

314. 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

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

Atomic radius

Ionization energy

N/P ratio

Electro negativity

316. 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

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

Al₂(OH)₄

Na₃AlO₃

NaAlO₂

Na₂Al(OH)₄

318. Freon-12 is used as a

Refrigerant

Herbicide

Insecticide

Fungicide

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

18

10

32

8

320. Bromine is obtained on a commercial scale from

Carnallite

Cryolite

Caliche

Common salt

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

I

Cl

Br

F

322. Which halogen has application in medicines mostly?

I₂

None

Br2

Cl₂

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

B³⁺

F¯

Li⁺

O²¯

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

Strong reducing agents

Weak oxidizing agents

Weak reducing agents

Strong oxidizing agents

325. An atom with high electro negativity has

Low electron affinity

Low ionization potential

Large size

High ionization potential

Page 14 of 14

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

Cs

K

Rb

Na

327. Among noble gases xenon gives compounds due to

Large size

Structure

Higher I-P

Zero electron affinity

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

Br

U

O

F

329. XeF₄ on partial hydrolysis produces

XeF₂

XeO₃

XeOF₄

XeOF₂

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

Lighter than air and cheap to produce

Expensive but easy to store in cylinder

Expense, but a very uncreative gas

Less dense then air and not flammable

Total Questions:	330
Time Allowed:	80 Minutes
Total Marks:	330
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	Chemistry Test ECAT Test MDCAT Test FPSC/PPSC/SPSC/KPPSC/BPSC/AJKPSC/NTS Chemistry Interview Question Answer

Chemistry The Halogens and Noble Gases Online Mcqs Test

Important Chemistry The Halogens and Noble Gases Question and Answer

Chemistry The Halogens and Noble Gases Practice Test Online With Explanation

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