Chemistry The Halogens And Noble Gases Online Mcqs Test

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Chemistry

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

Chlorine

Bromine

Iodine

Fluorine

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

Bond energy of fluorine is less than that of chlorine

Fluorine cannot be prepared by electrolysis of fused metal fluorides

Fluorine does not form oxoacid

Electron affinity of chlorine is greater than that of fluorine

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

Decreases down the group

Variation is not regular

Remains unchanged

Increases down the group

4. Which one boric acid is stable one?

H₂B₄O₇

H₃BO₃

None of these

HBO₃

5. Which statement is true about IV A group

There is a regular gradation of properties from top to bottom

Marked change of properties

Whole group consist of non-metals

Abrupt change of properties

6. Indicate the correct statement

Alkali metal atom has the smallest size in its period

Alkali metals do not reacts with metals

Alkali metals have ns’ configuring in outermost shells

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

7. Permonosulphuric acid is known as

Carlo’s acid

None of these

Marshall’s acid

Sulphuric acid

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

Mg

Ca

Sr

Ba

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

Neon

Helium

Radon

Argon

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

Haber

Solvay

Chamber

Castner

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

Borazole is electron deficient compound

Borazole is polar compound

Borazole is nonpolar compound

Of localized electrons in it

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

Cl₂ > Br₂ > I₂ > F₂

I₂ > Br₂ > Cl₂ > F₂

Br₂ > Cl₂ > F₂ > I₂

F₂ > Cl₂ > Br₂ > I₂

13. 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-3, b-1, c-4, d-2

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

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

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

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

CF₄

SF₄

HeF₄

XeF₄

15. Which is valence shell configuration of halogens?

nS₂, nP₃

ns₂, nP₅

NS₂, nP₄

nS₂, nP₆

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

HF

HBr

HCl

HI

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

Si

Pb

S

Fe

18. Neon glows in discharge tube as

Bluish

Greenish

Radish

Yellowish

19. 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 has highest first ionization energy

It is more reactive than other halogens

It restricts to oxidation state – 1 only

20. Which of the following is most electronegative?

C

Sn

Pb

Si

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

HBr

HI

HF

HU

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

Atomic numbers

Nuclear masses

Atomic masses

Nuclear neutron-proton number rations

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

SiO₂

CaO

SnO₂

CO₂

24. Among the halogens the rare element is

Iodine

Fluorine

Astatine

Chlorine

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

Kl has high m.p.

Kl is soluble in benzene

Lattice energy of CaO is much higher than that of Kl

CaO has high m.p.

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

Sodium ion

Chloride ion

Nitride ion

Fluoride ion

27. Which one has least dissociation energy?

HCL

HBr

HF

HI

28. Calico printing means

Leather printing

Glass printing

Paper printing

Cloth printing

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

As salts in ponds

In the atmosphere

In sea

In lakes

30. Which one of these is most reactive?

Mg

Na

K

Pb

31. Mark the compound which does not exist

SbCl₅

NCl₅

PF₅

AsF₅

32. The shape of gaseous SnCl₂ is

Angular

Linear

Tetrahedral

t-shaped

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

P > Si

Sr > Ca

Br > Cl

C > N

34. Which is the most volatile compound?

HCl

HF

HI

HBr

35. The substance not likely to contain CaCO₃ is

Sea shells

A marble states

Calcried gypsum

Dolomite

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

XeF₂

XeF₃

XeF₆

XeF₄

37. Which is the strongest acid

HNO3

Cannot be predicted

HCL

HCLO4

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

O > C > B > N

O > C > N > B

B > N > C > O

O > B > C > N

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

K⁺

O₂¯²

OH¯

O³¯

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

F

Br

I

Cl

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

Heavy metals

Halogens

Light metals

Noble gases

42. Electron affinity depends on

Atomic size

Atomic size and nuclear charge both

Atomic number

Nuclear charge

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

Ne

Ar

Rn

He

44. XeF₄ on partial hydrolysis produces

XeF₂

XeOF₄

XeO₃

XeOF₂

45. Oxygen shows oxidation states

-2

+2, -2

-2, +2, +6

+2, +4, +6

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

Metallic properties

Strongly bond valence electrons

Large atomic size

Small ionic size

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

To increase Al production

To protect the anodes

To make a conducting solution of bauxite

To act as reducing agent

48. Mark the nitrate which decomposes differently on heating

LiNO₃

KNO₃

RbNO₃

NaNO₃

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

Lower ionization energies

Greater hardness

Highest boiling points

Smaller ionic radii

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

Their ions are isoelectronic with noble gases

Low electronegativity

Low melting point

High ionization energy

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

Na₃AlO₃

Na₂Al(OH)₄

NaAlO₂

Al₂(OH)₄

52. Which gas can support combustion?

CO₂

CO

N₂O

N₂

53. Which noble gas is used earth quake prediction?

Ar

He

Rn

Kr

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

Atoms of sodium and chlorine

Free molecules

Free ions

Free electrons

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

SO₂

HCl

HBR

H₂S

56. The following has zero valency

Al

Na

Kr

Be

57. Which statement is correct?

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

None of these

Noble gases will all burn in pure oxygen

Noble gases are all dense gases

58. The name of CaSO₄. ½ H₂O is

Gypsum

Epsom salt

Plaster of Paris

Dolomite

59. Bromine is obtained on a commercial scale from

Cryolite

Caliche

Common salt

Carnallite

60. The metal used for making radiation shield is

Pb

Zn

Al

Fe

61. All the elements of oxygen family are

Polymorphic

Radioactive

Metalloids

Non-metals

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

Ca and CO₂

CaCO₃

CaC₂

CaO

63. The correct formula of Plaster of Paris is

CaSO₄.2H₂O

CaSO₄. 3H₂O

CaSO₄

CaSO₄. 1/2H₂O

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

Preventing overdeveloping and fogging

Dissolving out unreacted silver bromide

Converting silver halides to metallic silver

Reducing solubility of AgBr

65. Vander Waals forces are stronger in

F₂

I₂

Cl₂

Br₂

66. HNO₂ acts as an/a

Reducing agent

Acid

All the three

Oxidizing agent

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

10

18

54

2

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

O₂

He

H₂

Ar

69. Mark the element which shows greatness inert pair effect

Bromine

Iodine

Chlorine

Fluorine

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

Hydration energy

Electron affinity

Lattice energy

Ionization energy

71. White enamel of our teeth is

CaF₂

CaCl₂

CaBr₂

Ca₃(PO₄)₂

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

Metallic

Coordinate

Covalent

Ionic

73. What is more true about alkali metals?

Both oxidizing and reducing agents

Oxidizing agents

Hydrolyzing agents

Reducing agents

74. The last orbit of argon would have electrons

8

2

6

18

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

It oxidizes mercury

It cannot act as a bleaching agent

It oxidizes lead sulphides

It oxidizes potassium iodide

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

Decease in resistance with intensity of light

Decrease in resistance with increase in temperature

Different resistance under different circumstance

Increase in resistance with increase in temperature

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

Paramagnetic

Diamagnetic

Ferromagnetic

Antiferromagnetic

78. Freon-12 is used as a

Refrigerant

Herbicide

Insecticide

Fungicide

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

Sodium nitride

Sodium hydride

Sodium amide

Sodium azide

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

Te

Po

Fe

Pb

81. Halogens exist in the form of

Monoatomic molecules

Diatomic molecules

Cannot be predicted

Various forms

82. Aluminum (III) chloride forms a dimer because

Al has high ionization energy

It cannot form a trimer

Higher co-ordination can be achieved by Al

Al belongs to third group

83. NaoH is named as caustic soda because

It reacts with chlorine gas

It reacts with fats to form soap

It is used in soda water

It corrodes the organic tissues

84. Identify the correct statement

Gypsum is obtained by heating plaster of pairs

Gypsum contains a lower percentage of calcium than plaster of pairs

Plaster of Pairs can be obtained by partial oxidation of gypsum

Plaster of Paris is obtained by partial oxidation of gypsum

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

7

14

16

12

86. Which of the following is true for magnesium?

It is manufactured by electrolysis of aqueous magnesium chloride

It is a strong reducing agent

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

It is more electropositive than sodium

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

Polonium

Astatine

Radium

Francium

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

2NaOH + CO₂ → Na₂CO₃ + H₂O

CO₃ + H₂O → H₂CO₃

NH₃ + H₂CO₃ → NH₄HCO₃

NaCl + NH₄HCO₃ → NaHCO₃ + NH₄Cl

89. SO3 is not dissolve directly in H2O because

The reaction is highly exothermic

The reaction is quite slow

SO₃ is insoluble in H₂O

The reaction does not go to completion

90. P₂O₅ is heated with water to give

Hypo phosphorous acid

Orthophosphoric acid

Phosphorous acid

Hypo phosphoric acid

91. 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

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

Zinc

Aluminum

Iron

Copper

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

Tri-calcium silicate

Diclacium silicate

Tetra calcium aluminoferrite

Tri-calcium aluminate

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

Carbon

Oxygen

Boron

Nitrogen

95. In which form boron exist mostly in nature

Nitrides

Sulphides

Oxyborates

Oxides

96. 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

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

O₂

CO

H₂O₂

CO₂

98. The melting point in lowest for

Sr

Ca

Mg

Be

99. Which of the noble gas has highest polarizabilities?

Ar

Kr

Xe

He

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

Potassium only

Magnesium only

Potassium and magnesium

Magnesium and chlorine

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

Manganese dioxide

Lead nitrate

Potassium chlorate

Mercuric oxide

102. Hypo is used in photography for

The colour of picture

Developing picture

The fixation of picture

Picture printed

103. Heavy water is obtained by

Simple distillation of water

Removing impurities of calcium and magnesium form water

Dissolving heavy salt in water

Prolonged electrolysis of water

104. Which of the following oxides is peroxide?

BaO

Mn₂O

Na₂O₂

SO₂

105. 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

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

Hydration energy of ion

Electron affinity

High atomic number

Energy dissociation

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

Ca²⁺

Cl¯

K⁺

S²¯

108. 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

None of these of M²⁺ ions

High lattice energy of M²⁺ ions in the solid state

109. 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

110. Nitrolim is

CaCN₂ + C

Ca(CN)₂ + C

CaC₂ + C

All

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

Nitric oxide

Nitrous oxide

Dinitrogen tetraoxide

Nitrogen dioxide

112. The noble gas forming the maximum number of compounds

He

Ar

Ne

Xe

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

Expensive but easy to store in cylinder

Less dense then air and not flammable

Lighter than air and cheap to produce

Expense, but a very uncreative gas

114. A clathrate may be defined as a

Cage compound

Mixture

Solid solution

Liquid crystal

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

Leads to the dissolution of beryllium metal

Precipitate Mg

Precipitate Mg metal

Have no effect

116. Cassiterite is an ore of

Ni

Mn

Sb

Sn

117. The most abundant inert gas in the atmosphere is

Ne

Kr

Ar

He

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

Angular, disc

Linear, basic

Tetrahedral, acidic

Linear acidic

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

Lower electro positivity

None

Low charge density

Low electronegativity

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

Weak acid and weak base

Weak acid and strong base

Strong acid and weak base

Strong acid and strong base

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

Reaction with brine solution

Reaction with CO₂

Reaction with NaOH

Presence of NH₃

122. 6NaOH + Cl₂ → 5Nacl + Naclo₃ in this reaction chlorine is

Oxidized

No change

Reduced

Both oxidized and reduced

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

F > Cl > Br

Cl > F > Br

F > Br > Cl

Br > Cl > F

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

O₂+

None of these

O₂

O₂-

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

18

32

8

10

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

NaCl

CuSO₄

KCl

BaSO₄

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

Flint glass

Soda glass

Crooke’s glass

Borosilicate glass

128. Hydrochloric acid at 25°C is

None of these

Covalent and liquid

Ionic and gas

Ionic and liquid

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

Lead

Sodium

Zinc

Silver

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

C

D

B

A

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

Iodine

Fluorine

Chlorine

Bromine

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

14

11

16

10

133. Which of the following is correct?

Sodium reduces CO₂ to carbon

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

Magnallium is one alloy of Mg and zinc

Magnesium reacts with cold water and liberates hydrogen

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

F₂>Cl₂>Br₂>I2

I₂>Br₂>U₂>F₂

U₂>Br₂>I₂>F₂

I₂>F₂>Br₂>U₂

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

10

40

30

20

136. Common oxidation state of boron are

-3

+1

+3,-3

+3

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

He⁺

Li⁺

H

Na

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

Iron

Magnesium

Cobalt

Chromium

139. Which halogen is most electropositive?

I

Br

F

Cl

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

Astatine

Francium

Polonium

Radium

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

Nitrogen family

Oxygen family

Alkali metals

Halogens

142. 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

143. Cl₂O₇ is best prepared by passing by

Chlorine and oxygen over hot silver chlorate

Chlorine gas over hot HgO

Perchloric acid (CHIO₄) over hot silver oxide

Hydrogen chloride over phosphorus pentoxide

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

MnS

BaSO₄

ZnS

BaCO₃

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

Helium

Argon

Neon

Krypton

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

Si

Al

Tl

F

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

All the halogens have electronic configuration ns2P5

They have high electron affinity and ionization energy

All the halogens react with noble gases to form their halides

All are non-metals

148. Which one is the weakest oxyacid of chlorine?

HCIO₃

HCIO

HCIO₄

HCIO₂

149. The halogen having highest electron affinity is

Bromine

Chlorine

Fluorine

Iodine

150. 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

10mL

200mL

800 mL

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

Ionization energy

N/P ratio

Electro negativity

Atomic radius

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

CO

Al₂O₃

NH₃

CO₂

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

Isotopic number

Atomic number

Atomic mass

Mass number

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

F

Br

I

Cl

155. Electropositive character increase down the group due to

Decrease in I.P

Decrease in electronegativity of the elements

Increase in atomic size of elements

All of these

156. Which of the following is an inert gas?

N₂

H₂

O₂

Argon

157. I₂ is solid at room temperature because

It is highly electronegative

It has metallic bond

Its molecule has a large size

It possess hydrogen bonding

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

Fluorine

Iodine

Chlorine

Bromine

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

Small ionic size of Li⁺

Low ∆H lattice

High covalent nature

High ∆H lattice

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

Copper

Lead

Iron

Sodium

161. Which gives green colour in fireworks?

Sodium

Potassium

Barium

Calcium

162. 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

163. Which one has highest electron affinity?

F

Br

I

Cl

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

Mixture of argon and oxygen

Mixture of neon and oxygen

Mixture of helium and oxygen

Mixture of xenon and nitrogen

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

None of these

Te

Se

Po

166. Which halogen has application in medicines mostly?

Cl₂

Br2

None

I₂

167. Mark the correct statement

None of these

Iodine is a solid

Cl₂ is more insoluble in water

Br is more reactive than Cl₂

168. Among noble gases xenon gives compounds due to

Higher I-P

Large size

Structure

Zero electron affinity

169. The one which does not show variable valency is

Barium

Copper

Lead

Titanium

170. Which halogen have most corrosive action on skin?

Br₂

F₂

I₂

Chlorine

171. The colour of I₂ in CCI₄ is

Violet

Bluish green

Radish brown

Colourless

172. An atom with high electro negativity has

Low ionization potential

Large size

High ionization potential

Low electron affinity

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

M₂O₃

M₂O

MO

MO₂

174. Mark the correct statement

Carbonates of Na, K, NH₄ are soluble in water

Basic carbonates of Mg and Cu are soluble in water

Carbonates of Ca, Ba, Sr are soluble in water

Li₂CO₃ is soluble in water

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

Third

Fourth

Sixth

Fifth

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

Variable trend

Highly soluble in water

Less soluble in water

Insoluble in water

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

Iron and sulphur

Proton and silicon

Gallium and Germanium

Aluminum and silicon

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

Rn

Lr

Fr

Ra

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

Na

Cl₂

O₂

H₂

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

Chromyl chloride

Chromous chloride

Chromic chloride

None

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

None

d-orbitals

s-orbitals

p-orbitals

182. Which one of them is monoatomic?

Oxygen

Neon

Nitrogen

Fluorine

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

Cl₂

H₂

H₂O

O₂

184. All halogen are

Oxidizing as well as reducing agents

Drying agents

Oxidizing agents

Reducing agents

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

High atomic number

Electron affinity

Energy dissociation

Hydration energy

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

Noble gases have o heat of vapourization

It increases gradually down the group

None of these

It decreases gradually down the group

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

I

Cl

F

S

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

F

Cl

Br

I

189. Orthophosphoric acid is

Tetrabasic

Dibasic

Monobasic

Tribasic

190. The noble gas He was discovered by

Frank land and Lockyer

Chadwick

Dorn

Rutherford

191. Number of elements present in 5th period is

32

18

24

8

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

Hyponitrous acid

Nitrosyl chloride

Nitrogen trichloride

Phosphorus trichloride

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

Hydration energies of cations

Lattice energy solids

Inter – ionic attraction

Entropy of solution formation

194. The important ore of lead is

Haematite

Galena

Bauxite

Chalcopyrites

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

F¯

Li⁺

O²¯

B³⁺

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

Gain 3 electrons

Lose 2 electrons

Lose 3 electrons

Gain 2 electrons

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

Entropy of solution formation

Hydration energies of cations

Inter ionic attraction

Lattice energies if solids

198. Which of the following phosphorus is most reactive?

Scarlet phosphorus

White phosphorus

Violet phosphorus

Red phosphorus

199. Which of the following is acidic?

N₂O

SO₃

BeO

HgO

200. 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

Ionic character of the compound

The stability of +2 oxidation state

The basic character of the oxides

Page 9 of 14

201. XeF₄ involves which hybridization

Sp³d²

Sp²

Sp²d

Sp

202. NaOH is prepared by the method

Down’s cell

Castner cell

Solvay process

Castner Kellner cell

203. The element that does not form a monoxide is

Lead

Tin

Germanium

Silicon

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

NaBr

NaCl

Nal

NaF

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

It is used in the formation white cement

It is used as fire proof in textile

It is used furniture polish

It is as filter for soap

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

Sodium amide

Sodium atoms

Solvated electrons

Sodium hydride

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

Both have similar electronic configurations

Both have nearly the same size

The ratio of their charge to size is nearly the same

Both are found together in nature

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

Cl₂

F₂

I₂

Br₂

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

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

There is no change in the nuclear charge

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

None of these

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

Ionization potential

Heat of hydration

Electron affinity

Heat of dissociation

211. 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 largest size

Has the lowest ionization enthalpy

Has the highest heat of vaporization

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

Calcium

Barium

Beryllium

Strontium

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

Si > Mg > Al > Na

Mg > Na > Al > Si

Al > Mg > Na > Si

Na > Mg > Al > Si

214. 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

Some nitrogen molecules analogous to O₂

CO₂

Argon

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

It is a gas at room temperature

It has oxidation state of +4

It forms R₂O₃

It forms RX₂

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

Ba

K

Rb

Li

217. The percentage of lead in lead pencil is

80

20

Zero

70

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

Electro negativity

Ionic radius

Melting point

First ionization energy

219. Which of the following has greatest reducing power?

HCl

HI

HBr

HI

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

Ar

Xe

Kr

Rn

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

1½

2

5/2

½

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

Weak van der Waals forces between atoms

Gaseous nature

Inertness

High polarisability

223. The ionization potential is lowest for the

Alkali metals

Halogens

Alkaline earth metals

Inert gases

224. 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 sulphate

A bromide

225. 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

Page 10 of 14

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

Magnesium

Mercury

Phosphorus

Copper

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

Cs

Cu

Ba

Cr

228. Which noble gas is used in labors?

Helium

Krypton

Argon

Neon

229. Which of the following is not isoelectronic?

Cl¯

O²¯

Na⁺

Mg²⁺

230. Strongest reducing agent is

Hl

HF

HCl

HBr

231. The most acidic of the following compounds is

P₂O₃

B₂O₃

As₂O₃

Sb₂O₃

232. 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

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

Helium

Neon

Oxygen

Nitrogen

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

44%

33%

11%

22%

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

Graphite

Coke

Diamond

Coal

236. The noble gases consist of

Atoms linked by weak bonds

Single free atoms

Triatomic molecules

Diatomic molecules

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

Hydrating sand and gravel mixed with cement

Developing interlocking needle like crystals of hydrated silicates

Converting sand into silici acid

Keeping it cool

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

O

Si

P

As

239. Which of the halogen has highest electronegativity?

Chlorine

Bromine

Fluorine

Iodine

240. Which of the following has highest dipole moment?

NH₃

PH₃

AsH₃

SbH₃

241. The halogen that is most easily reduced is

F₂

Br₂

I₂

Cl₂

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

Orthophosphoric acid

Pyro phosphoric acid

Metaphosphoric acid

Hypo phosphorous acid

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

Alumina

Magnesia

Iron oxide

Silica

244. Which one is hygroscopic in nature?

HNO3

HBr

HUO4

HCL

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

More electron repulsion in fluorine

More electro negativity of fluorine

Non-metallic nature of fluorine

Small size of fluorine

246. Which shows maximum catenation property?

Se

Te

O

S

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

Na, Ca

Ca, Cl

Cl, Br

Na, Cl

248. What causes nitrogen to be chemically inert?

Multiple bond formation in the molecule

High bond energy

Absence of bond polarity

Short internuclear distance

249. 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

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

Additive electrons are accommodated in new electron level

Effective nuclear charge increases

Atomic number increases

Atomic mass increases

Page 11 of 14

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

Boiling point

Density

Atomic radius

Ionization energy

252. Mark the smallest atom

F

Cl

I

Br

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

Ne

B

Li

F

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

Br

O

F

U

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

Sulphur is present in the mixture as impurity

IV group radicals are precipitated as sulphides

III group radicals are precipitated as hydroxides

Of the oxidation of H₂S gas by some acid radicals

256. Variable valency is characteristic of

Noble gas

Alkali metals

Transition elements

Halogen

257. Alkaline earth metals comes under

Halogens

Inner transition elements

Transition elements

Representative elements

258. Sulphuric acid reacts with PCl₅ to give

Sulphur tetrachloride

Thionyl chloride

Sulphur monochloride

Sulphuryl chloride

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

Fe

Al

Mg

Na

260. Crystalline form of sulphur stale at room temperature is

Prismatic sulphur

Plastic sulphur

Monoclinic sulphur

Rhombic sulphur

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

1, 12, 30, 4, 62

12, 20, 56, 88

9, 17, 35, 53

37, 19, 3, 55

262. Pyrex glass is a mixture of

Sodium silicate and aluminum borosilicate

Sodium silicate and lead silicate

Sodium silicate and calcium silicate

Sodium borosilicate and aluminum borosilicate

263. 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

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

Calcium sulphates

Magnesium sulphates

Magnesium ammonium phosphate

Ferrous ammonium sulphate

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

Argon

Neon

Radon

Xenon

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

Half-life of Rn is only 3-8 days

Ne is obtained during radioactive disintegration

HE is used in producing very low temperatures

Ar is used in electric bulbs

267. Which one is the biggest ion?

Mg²⁺

Na⁺

Al³⁺

Ba²⁺

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

Li⁺

Al⁺

Mg⁺

Ne

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

Boiling point

Ionization energy

Density

Atomic radius

270. Deliquescence is a process in which a solid

Absorbs moisture and remain solid

Increases the water of crystallization

Loses water of crystallization

Absorbs moisture and turn into liquid

271. The halogen which has only one oxidation state is

I

Cl

F

Br

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

Li

He

N

Zn

273. Which of the following is most electronegative?

Carbon

Lead

Silicon

Tin

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

HBr

HCl

HF

Hl

275. The most powerful oxidizing agent among the halogens is

I₂

F₂

Br₂

Cl₂

Page 12 of 14

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

Calcium carbonate

Sodium bicarbonate

Calcium oxide

Sodium carbonate

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

Chlorophyll

Haemoglobin

ATP

Florigen

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

Strongest vanderwaal’s force

H. bonding

Dipole-dipole forces

None of these

279. Sea weeds are important source of

Iron

Bromine

Iodine

Chlorine

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

Solvay process of sodium carbonate

Phosphorus from phosphorite

Iron from haematite

Ordinary (soda lime) glass

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

I

Cl

F

Br

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

Extremely high electropositivity of Li

Hydration of Li⁺ ion

Greater hardness of Li

Small size of lithium atom and Li⁺ ion

283. Select the weakest acid among the following

HCl

HBr

HI

HF

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

Weak oxidizing agents

Strong oxidizing agents

Strong reducing agents

Weak reducing agents

285. 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 restricts to oxidation state – 1 only

It has highest first I.E

It is more reactive than other halogens

It has highest E.N

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

Ar

Xe

He

Ne

287. The structure of XeF₆

Distorted octahedral

None of these

Pyramidal

Tetrahedral

288. Mark the incorrect statement about ‘Li’

‘Li’ has a great tendency to form hydrates

‘Li’ combine with nitrogen directly to form Lithium nitride

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

‘Li’ is not effected by air

289. Which is the strongest acid?

HClO₃

HClO₄

HClO

HClO₂

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

Oxygen

Calcium oxide

Hypochlorous acid

Chlorine

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

Iodine solution

NaCl

Chlorine

Ki

292. Which of the following is most volatile?

HI

HBr

HF

HCl

293. AlCl₃ flumes in moist air because

HCl is formed in moist air

It is covalent

It is highly hygroscopic

It is very volatile

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

Fluorine is highly reactive

HF molecules form intermolecular H-bonds

HF is the weakest acid

Fluorine atom is smaller in size

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

Borax

Alum

Gypsum

Calomel

296. Plaster of Paris is used

In metallurgical process

As a drying agent

In dentistry and surgery

As a plaster for walls

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

Na

Rb

Cs

K

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

Sun light

Moisture

None of these

Dry air

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

200

400

1000

250

300. 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

Page 13 of 14

301. The acid which has a peroxy linkage is

Dithionic acid

Sulphurous acid

Pyrosulphuric acid

Carlo’s acid

302. Which one halogen is radioactive?

Bromine

Chlorine

Iodine

Astatine

303. Who reported first noble gas?

Ramsay

Cavendish

Frank land

J.J Thomson

304. Calcium is obtained by

Reduction of calcium chloride with carbon

Electrolysis of molten anhydrous or fused calcium chloride

Roasting lime stone

Electrolysis of solution of calcium chloride in water

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

Bromine

Iodine

Fluorine

Chlorine

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

Chlorine

Carbon dioxide

Sulphur dioxide

Iodide

307. The bleaching action of chlorine is due to

Chlorination

Oxidation

Hydrogenation

Reduction

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

Sodium hydride

Sodium atoms

Solvated electrons

Sodium amide

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

2,8,7

2,8,2

2,8

2,8,18,2

310. The noble gases are

All of these

Polyatomic

Diatomic

Monoatomic

311. Bond angle is minimum for

H₂Te

H₂O

H₂Se

H₂S

312. Polyanion formation is maximum in

Nitrogen

Boron

Sulphur

Oxygen

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

P

N

Li

C

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

Si

C

Al

Be

315. 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

316. The type of hybridization of born in diborane is

Sp³d²-hybridisation

Sp-hybridisation

Sp²-hybridisation

Sp³- hybridization

317. Boron compounds behave as Lewis acid because of their

Acidic nature

Electron deficiency

Covalent nature

Ionization property

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

Sodium persulphate

Sodium sulphides

Sodiums sulphates

Sodium thiosulphate

319. Sulphuric acid has great affinity for water because

It hydrolyses the acid

Acid decomposes water

It decomposes the acid

Acid forms hydrates with water

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

O₂ and Ar

O₂ and He

CO₂ and Ar

O₂ and CO₂

321. 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

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

Of easy extraction of Al from it

Bauxite is available in large quantity

Bauxite is less impure

Bauxite contains maximum of Al

323. Alkali metals are generally extracted by

Electrolytic methods

Double decomposition methods

Reduction methods

Displacement methods

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

I₂

Br₂

F₂

Cl₂

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

As an abrasive in the form of abundum

As an oxidizer in metallurgy

In form of foil for wrapping

For preparing artificial

Page 14 of 14

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

Cl

F

I

Br

327. Which of the following statements is incorrect?

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

Sodium is the most abundant metallic element in sea water

Ionic character of alkali metal halides decreases down the group

Melting and boiling points of alkali metals decrease down the group

328. Fluorine differs from other halogens due to

Small size

All

Low first ionization energy

High dissociation energy

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

Li

Mg

Cl

Rb

330. Which statement is correct about halogens?

They are all capable of exhibiting several oxidation states

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

They are all diatomic and form univalent ions

They are all diatomic and form divalent ions

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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