Chemistry The Halogens And Noble Gases Online Mcqs Test

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Chemistry

1. Which of the halogen has highest electronegativity?

Bromine

Chlorine

Iodine

Fluorine

2. Which halogen is most electropositive?

Br

F

I

Cl

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

Bauxite is less impure

Of easy extraction of Al from it

Bauxite is available in large quantity

Bauxite contains maximum of Al

4. Sea weeds are important source of

Bromine

Iron

Iodine

Chlorine

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

Strong reducing agents

Weak oxidizing agents

Weak reducing agents

Strong oxidizing agents

6. The noble gas forming the maximum number of compounds

Ne

He

Ar

Xe

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

Have no effect

Precipitate Mg metal

Leads to the dissolution of beryllium metal

Precipitate Mg

8. The melting point in lowest for

Ca

Sr

Be

Mg

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

BaSO₄

KCl

NaCl

CuSO₄

10. Which one is hygroscopic in nature?

HCL

HUO4

HNO3

HBr

11. Mark the element which shows greatness inert pair effect

Fluorine

Bromine

Chlorine

Iodine

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

Radon

Neon

Xenon

Argon

13. 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 has oxidation state of +4

It forms R₂O₃

14. NaOH is prepared by the method

Castner cell

Solvay process

Castner Kellner cell

Down’s cell

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

F > Cl > Br

F > Br > Cl

Cl > F > Br

Br > Cl > F

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

BaSO₄

MnS

BaCO₃

ZnS

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

Low ∆H lattice

High covalent nature

High ∆H lattice

Small ionic size of Li⁺

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

For preparing artificial

In form of foil for wrapping

As an oxidizer in metallurgy

As an abrasive in the form of abundum

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

Dinitrogen tetraoxide

Nitrous oxide

Nitrogen dioxide

Nitric oxide

20. Which of the following statements is incorrect?

Melting and boiling points of alkali metals decrease down the group

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

Ionic character of alkali metal halides decreases down the group

Sodium is the most abundant metallic element in sea water

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

Borax

Gypsum

Calomel

Alum

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

Argon

CO₂

Some nitrogen molecules analogous to O₂

Greater amount of nitrogen molecules derived from N¹⁵ isotope

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

Oxygen

Nitrogen

Neon

Helium

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

Polonium

Francium

Astatine

Radium

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

Chamber

Solvay

Haber

Castner

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

Both are found together in nature

Both have nearly the same size

Both have similar electronic configurations

The ratio of their charge to size is nearly the same

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

NH₃ + H₂CO₃ → NH₄HCO₃

CO₃ + H₂O → H₂CO₃

2NaOH + CO₂ → Na₂CO₃ + H₂O

NaCl + NH₄HCO₃ → NaHCO₃ + NH₄Cl

28. Hydrochloric acid at 25°C is

Covalent and liquid

Ionic and liquid

None of these

Ionic and gas

29. Vander Waals forces are stronger in

I₂

F₂

Cl₂

Br₂

30. The percentage of lead in lead pencil is

Zero

20

80

70

31. Pyrex glass is a mixture of

Sodium borosilicate and aluminum borosilicate

Sodium silicate and calcium silicate

Sodium silicate and lead silicate

Sodium silicate and aluminum borosilicate

32. The metal used for making radiation shield is

Zn

Pb

Fe

Al

33. The halogen that is most easily reduced is

Br₂

F₂

I₂

Cl₂

34. Which statement is true about IV A group

Marked change of properties

There is a regular gradation of properties from top to bottom

Whole group consist of non-metals

Abrupt change of properties

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

Si

F

Al

Tl

36. Match List I with List II and select the answer using the codes given below:

Code	List I	Code	List II
a	XeF₄	1	Distorted octahedral
b	XeF₆	2	Tetrahedral
c	XeO₃	3	Square planar
d	XeO₄	4	Trigonal pyramidal

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

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

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

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

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

C

N

P

Li

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

None of these

It decreases gradually down the group

Noble gases have o heat of vapourization

It increases gradually down the group

39. Which one has least dissociation energy?

HBr

HCL

HI

HF

40. Orthophosphoric acid is

Dibasic

Monobasic

Tribasic

Tetrabasic

41. The type of hybridization of born in diborane is

Sp-hybridisation

Sp²-hybridisation

Sp³d²-hybridisation

Sp³- hybridization

42. Mark the compound which does not exist

SbCl₅

NCl₅

AsF₅

PF₅

43. Boron compounds behave as Lewis acid because of their

Covalent nature

Ionization property

Acidic nature

Electron deficiency

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

Variable trend

Insoluble in water

Highly soluble in water

Less soluble in water

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

Rb

Cl

Mg

Li

46. The ionization potential is lowest for the

Halogens

Alkali metals

Inert gases

Alkaline earth metals

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

O₂

O₂+

None of these

O₂-

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

Copper

Sodium

Iron

Lead

49. Variable valency is characteristic of

Transition elements

Alkali metals

Noble gas

Halogen

50. Which noble gas is used earth quake prediction?

Rn

He

Ar

Kr

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51. Plaster of Paris is used

In dentistry and surgery

As a drying agent

In metallurgical process

As a plaster for walls

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

d-orbitals

None

s-orbitals

p-orbitals

53. Which of the following is most volatile?

HF

HCl

HI

HBr

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

Ordinary (soda lime) glass

Solvay process of sodium carbonate

Iron from haematite

Phosphorus from phosphorite

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

Chlorine

Carbon dioxide

Iodide

Sulphur dioxide

56. Which of the following is most electronegative?

Si

C

Pb

Sn

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

XeF₂

XeF₄

XeF₃

XeF₆

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

HF

HCl

HBr

HI

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

F₂ > Cl₂ > Br₂ > I₂

Cl₂ > Br₂ > I₂ > F₂

Br₂ > Cl₂ > F₂ > I₂

I₂ > Br₂ > Cl₂ > F₂

60. 6NaOH + Cl₂ → 5Nacl + Naclo₃ in this reaction chlorine is

Both oxidized and reduced

Oxidized

No change

Reduced

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

Atomic mass

Mass number

Atomic number

Isotopic number

62. 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

In the most readily available gas

Has the largest size

Has the lowest ionization enthalpy

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

Smaller ionic radii

Greater hardness

Lower ionization energies

Highest boiling points

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

C > N

Sr > Ca

P > Si

Br > Cl

65. Which of the following is not isoelectronic?

Na⁺

O²¯

Cl¯

Mg²⁺

66. Electron affinity of sulphur is

Equal to O and Se

More than O but less than Se

More than O and Se

Less than O but more than SE

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

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

They contain only one electron in their outermost shell

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

Their ionization potential is less than that of other elements

68. The important ore of lead is

Galena

Haematite

Chalcopyrites

Bauxite

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

Rb

K

Na

Cs

70. 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

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

Cl₂

Br₂

F₂

I₂

72. The substance not likely to contain CaCO₃ is

Dolomite

Calcried gypsum

A marble states

Sea shells

73. Oxygen shows oxidation states

+2, +4, +6

-2, +2, +6

+2, -2

-2

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

Free ions

Free molecules

Free electrons

Atoms of sodium and chlorine

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

Moisture

Sun light

Dry air

None of these

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

Iodine

Chlorine

Fluorine

Bromine

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

Ar

Rn

Ne

He

78. P₂O₅ is heated with water to give

Phosphorous acid

Hypo phosphoric acid

Orthophosphoric acid

Hypo phosphorous acid

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

Sr

Mg

Ba

Ca

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

HF is the weakest acid

HF molecules form intermolecular H-bonds

Fluorine atom is smaller in size

Fluorine is highly reactive

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

9, 17, 35, 53

12, 20, 56, 88

37, 19, 3, 55

1, 12, 30, 4, 62

82. HNO₂ acts as an/a

All the three

Oxidizing agent

Reducing agent

Acid

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

OH¯

K⁺

O³¯

O₂¯²

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

10

14

16

11

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

Calcium oxide

Calcium carbonate

Sodium carbonate

Sodium bicarbonate

86. The name of CaSO₄. ½ H₂O is

Dolomite

Epsom salt

Gypsum

Plaster of Paris

87. Indicate the correct statement

Alkali metals have ns’ configuring in outermost shells

Alkali metal atom has the smallest size in its period

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

Alkali metals do not reacts with metals

88. Halogens exist in the form of

Cannot be predicted

Various forms

Monoatomic molecules

Diatomic molecules

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

H₂O₂

CO₂

O₂

CO

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

Presence of NH₃

Reaction with CO₂

Reaction with NaOH

Reaction with brine solution

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

Li

B

F

Ne

92. 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

93. Which statement is correct?

None of these

Noble gases will all burn in pure oxygen

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

Noble gases are all dense gases

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

Br

O

F

U

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

Iodine

Fluorine

Bromine

Chlorine

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

F

Cl

Br

I

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

Po

None of these

Se

Te

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

½

2

5/2

1½

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

He

Zn

N

Li

100. Which statement is correct about halogens?

They are all diatomic and form divalent ions

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

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101. Who reported first noble gas?

Ramsay

J.J Thomson

Frank land

Cavendish

102. Mark the incorrect statement about ‘Li’

‘Li’ has a great tendency to form hydrates

‘Li’ is not effected by air

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

‘Li’ combine with nitrogen directly to form Lithium nitride

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

Silica

Magnesia

Alumina

Iron oxide

104. Strongest reducing agent is

HF

HCl

Hl

HBr

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

16

14

7

12

106. 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 restricts to oxidation state – 1 only

It has highest electronegativity

It is more reactive than other halogens

107. Deliquescence is a process in which a solid

Increases the water of crystallization

Loses water of crystallization

Absorbs moisture and turn into liquid

Absorbs moisture and remain solid

108. All the elements of oxygen family are

Non-metals

Metalloids

Radioactive

Polymorphic

109. Fluorine differs from other halogens due to

Low first ionization energy

Small size

All

High dissociation energy

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

Nitrogen family

Alkali metals

Oxygen family

Halogens

111. Bromine is obtained on a commercial scale from

Cryolite

Common salt

Carnallite

Caliche

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

M₂O₃

M₂O

MO₂

MO

113. 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 has highest first I.E

It is more reactive than other halogens

It restricts to oxidation state – 1 only

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

Na₃PO₄

Anhydrous calcium chloride

Phosphorus pentoxidse

Active charcoal

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

11%

44%

33%

22%

116. Which shows maximum catenation property?

Te

O

Se

S

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

Ne

Ar

Xe

He

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

NaAlO₂

Na₃AlO₃

Al₂(OH)₄

Na₂Al(OH)₄

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

Keep away the sharks

Mark the ship lighter

Prevent puncturing by under sea rock

To prevent the action of water and salt

120. Select the weakest acid among the following

HI

HF

HCl

HBr

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

Neon

Helium

Radon

Argon

122. 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 much less soluble in blood than helium

Nitrogen is highly soluble in water

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

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

Light metals

Heavy metals

Noble gases

Halogens

124. I₂ is solid at room temperature because

Its molecule has a large size

It has metallic bond

It is highly electronegative

It possess hydrogen bonding

125. Which is the strongest acid?

HClO

HClO₃

HClO₂

HClO₄

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

Argon

Neon

Krypton

Helium

127. Common oxidation state of boron are

+3

+1

+3,-3

-3

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

I

F

Br

Cl

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

CaO has high m.p.

Kl is soluble in benzene

Lattice energy of CaO is much higher than that of Kl

Kl has high m.p.

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

F₂

Cl₂

I₂

Br₂

131. Which of the following is an inert gas?

O₂

N₂

Argon

H₂

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

High atomic number

Hydration energy

Electron affinity

Energy dissociation

133. 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

Lighter than air and cheap to produce

Less dense then air and not flammable

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

Pyro phosphoric acid

Metaphosphoric acid

Hypo phosphorous acid

Orthophosphoric acid

135. Sulphuric acid reacts with PCl₅ to give

Sulphuryl chloride

Sulphur monochloride

Sulphur tetrachloride

Thionyl chloride

136. Aluminum (III) chloride forms a dimer because

Al belongs to third group

Al has high ionization energy

It cannot form a trimer

Higher co-ordination can be achieved by Al

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

Sodium amide

Sodium hydride

Sodium atoms

Solvated electrons

138. The shape of gaseous SnCl₂ is

Tetrahedral

t-shaped

Angular

Linear

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

I

Br

F

Cl

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

Si

Be

Al

C

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

Atomic radius

Boiling point

Ionization energy

Density

142. The alkali metals

Form salt like hydrides

Form salts which are predominantly covalent

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

Show increasing electro negativity from Li to Cs.

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

Dissolving out unreacted silver bromide

Preventing overdeveloping and fogging

Converting silver halides to metallic silver

Reducing solubility of AgBr

144. Which of the following is true for magnesium?

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 a strong reducing agent

It is more electropositive than sodium

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

Gain 2 electrons

Lose 3 electrons

Lose 2 electrons

Gain 3 electrons

146. Which one of these is most reactive?

K

Pb

Mg

Na

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

Chromous chloride

None

Chromic chloride

Chromyl chloride

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

O²¯

Li⁺

B³⁺

F¯

149. What causes nitrogen to be chemically inert?

Absence of bond polarity

Multiple bond formation in the molecule

High bond energy

Short internuclear distance

150. The colour of I₂ in CCI₄ is

Radish brown

Violet

Colourless

Bluish green

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

HBR

HCl

H₂S

SO₂

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

S²¯

Cl¯

Ca²⁺

K⁺

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

Cl

Br

F

I

154. Mark the smallest atom

I

F

Br

Cl

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

Bromine

Chlorine

Iodine

Fluorine

156. 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

157. An atom with high electro negativity has

Low ionization potential

Large size

High ionization potential

Low electron affinity

158. The noble gases consist of

Single free atoms

Diatomic molecules

Triatomic molecules

Atoms linked by weak bonds

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

Graphite

Diamond

Coal

Coke

160. Sulphuric acid has great affinity for water because

Acid decomposes water

It hydrolyses the acid

Acid forms hydrates with water

It decomposes the acid

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

It oxidizes lead sulphides

It oxidizes potassium iodide

It oxidizes mercury

It cannot act as a bleaching agent

162. The halogen which has only one oxidation state is

Br

I

Cl

F

163. The bleaching action of chlorine is due to

Hydrogenation

Oxidation

Reduction

Chlorination

164. 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

Different resistance under different circumstance

Decrease in resistance with increase in temperature

Increase in resistance with increase in temperature

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

Low electronegativity

Lower electro positivity

Low charge density

None

166. Identify the incorrect statement with respect to ozone.

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

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

Ozone is more reactive than dioxygen

Ozone is diamagnetic whereas dioxygen is paramagnetic

167. Which of the following has highest dipole moment?

SbH₃

NH₃

PH₃

AsH₃

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

To increase Al production

To act as reducing agent

To protect the anodes

To make a conducting solution of bauxite

169. Which of the following phosphorus is most reactive?

Scarlet phosphorus

Violet phosphorus

White phosphorus

Red phosphorus

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

Mg

Na

Fe

Al

171. Cassiterite is an ore of

Mn

Sn

Ni

Sb

172. Freon-12 is used as a

Insecticide

Refrigerant

Herbicide

Fungicide

173. 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 basic character of the oxides

The stability of +2 oxidation state

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

Energy dissociation

Hydration energy of ion

High atomic number

Electron affinity

175. 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

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176. Which gas can support combustion?

CO₂

N₂O

CO

N₂

177. 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

200mL

800 mL

10mL

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

O₂

H₂

Na

Cl₂

179. Which one of them is monoatomic?

Fluorine

Oxygen

Neon

Nitrogen

180. Which of the following oxides is peroxide?

SO₂

Na₂O₂

Mn₂O

BaO

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

Oxygen

Boron

Carbon

Nitrogen

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

D

C

A

B

183. XeF₄ involves which hybridization

Sp

Sp²d

Sp³d²

Sp²

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

Francium

Polonium

Radium

Astatine

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

Ne is obtained during radioactive disintegration

Ar is used in electric bulbs

Half-life of Rn is only 3-8 days

HE is used in producing very low temperatures

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

HF

HU

HBr

HI

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

Magnesium only

Potassium only

Magnesium and chlorine

Potassium and magnesium

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

Sodiums sulphates

Sodium sulphides

Sodium thiosulphate

Sodium persulphate

189. Which of the following is most electronegative?

Lead

Carbon

Tin

Silicon

190. Calico printing means

Paper printing

Cloth printing

Glass printing

Leather printing

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

Atomic mass increases

Effective nuclear charge increases

Atomic number increases

Additive electrons are accommodated in new electron level

192. Bond angle is minimum for

H₂O

H₂Te

H₂S

H₂Se

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

32

10

8

18

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

HeF₄

SF₄

XeF₄

CF₄

195. Neon glows in discharge tube as

Yellowish

Bluish

Radish

Greenish

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

Calcium sulphates

Magnesium ammonium phosphate

Ferrous ammonium sulphate

Magnesium sulphates

197. Which of the noble gas has highest polarizabilities?

Xe

He

Kr

Ar

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

Fluorine

Bromine

Chlorine

Iodine

199. Which one halogen is radioactive?

Chlorine

Astatine

Iodine

Bromine

200. Mark the correct statement

Li₂CO₃ is soluble in water

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

Page 9 of 14

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

Fluoride ion

Nitride ion

Chloride ion

Sodium ion

202. Nitrolim is

All

CaCN₂ + C

Ca(CN)₂ + C

CaC₂ + C

203. XeF₄ on partial hydrolysis produces

XeOF₂

XeOF₄

XeO₃

XeF₂

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

Li⁺

Mg⁺

Ne

Al⁺

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

2

10

18

54

206. The following has zero valency

Na

Kr

Be

Al

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

Beryllium

Barium

Strontium

Calcium

208. 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

209. 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

Keeping it cool

Hydrating sand and gravel mixed with cement

210. Identify the correct statement

Elemental Na is insoluble in NH₃

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

Elemental Na is easily oxidized

Elemental Na is a strong oxidizing agent

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

With inert gases

None of these

With alkali metals

With halogens

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

H₂

H₂O

O₂

Cl₂

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

Mercuric oxide

Potassium chlorate

Lead nitrate

Manganese dioxide

214. Which gives green colour in fireworks?

Potassium

Barium

Sodium

Calcium

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

Cobalt

Iron

Magnesium

Chromium

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

Hl

HF

HBr

HCl

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

Angular, disc

Linear acidic

Linear, basic

Tetrahedral, acidic

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

The hydration energy of Na₂SO₄ is more than its lattice energy

Both a and b

The lattice energy of BaSO₄ is more than its hydration energy

The lattice energy has no role to play in solubility

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

Hyponitrous acid

Phosphorus trichloride

Nitrogen trichloride

Nitrosyl chloride

220. The acid which has a peroxy linkage is

Pyrosulphuric acid

Carlo’s acid

Sulphurous acid

Dithionic acid

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

There is no change in the nuclear charge

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

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

None of these

222. Electron affinity depends on

Nuclear charge

Atomic size and nuclear charge both

Atomic number

Atomic size

223. Identify the correct statement

Gypsum is obtained by heating plaster of pairs

Plaster of Pairs can be obtained by partial oxidation of gypsum

Plaster of Paris is obtained by partial oxidation of gypsum

Gypsum contains a lower percentage of calcium than plaster of pairs

224. Which halogen have most corrosive action on skin?

F₂

Chlorine

I₂

Br₂

225. Which halogen has application in medicines mostly?

None

Br2

Cl₂

I₂

Page 10 of 14

226. 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

227. Which is the most volatile compound?

HBr

HCl

HI

HF

228. 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

Three layers are maintained at different temperatures

Three layers have different densities

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

229. The most acidic of the following compounds is

As₂O₃

P₂O₃

B₂O₃

Sb₂O₃

230. Mark the nitrate which decomposes differently on heating

RbNO₃

KNO₃

NaNO₃

LiNO₃

231. Alkali metals are generally extracted by

Double decomposition methods

Electrolytic methods

Reduction methods

Displacement methods

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

Coordinate

Metallic

Covalent

Ionic

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

Ionization energy

Electro negativity

N/P ratio

Atomic radius

234. Which is valence shell configuration of halogens?

nS₂, nP₃

NS₂, nP₄

nS₂, nP₆

ns₂, nP₅

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

Calcium oxide

Oxygen

Hypochlorous acid

Chlorine

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

88.60 g

17.72 g

70.90 g

35.45 g

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

None of these

H. bonding

Dipole-dipole forces

Strongest vanderwaal’s force

238. Mark the correct statement

None of these

Cl₂ is more insoluble in water

Iodine is a solid

Br is more reactive than Cl₂

239. Which of the following has greatest reducing power?

HI

HBr

HCl

240. A clathrate may be defined as a

Solid solution

Cage compound

Mixture

Liquid crystal

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

H₂

O₂

He

Ar

242. The most abundant inert gas in the atmosphere is

He

Ne

Kr

Ar

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

Silver

Lead

Sodium

Zinc

244. Which one is the weakest oxyacid of chlorine?

HCIO₃

HCIO₄

HCIO

HCIO₂

245. Crystalline form of sulphur stale at room temperature is

Monoclinic sulphur

Plastic sulphur

Rhombic sulphur

Prismatic sulphur

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

Heat of hydration

Ionization potential

Heat of dissociation

Electron affinity

247. 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

248. The structure of XeF₆

Pyramidal

Tetrahedral

Distorted octahedral

None of these

249. Hypo is used in photography for

Picture printed

The colour of picture

Developing picture

The fixation of picture

250. Calcium is obtained by

Roasting lime stone

Electrolysis of solution of calcium chloride in water

Electrolysis of molten anhydrous or fused calcium chloride

Reduction of calcium chloride with carbon

Page 11 of 14

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

2,8

2,8,2

2,8,18,2

2,8,7

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

B > N > C > O

O > C > N > B

O > B > C > N

O > C > B > N

253. 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

254. Which one has highest electron affinity?

F

Br

I

Cl

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

H

Li⁺

Na

He⁺

256. The noble gas He was discovered by

Frank land and Lockyer

Rutherford

Chadwick

Dorn

257. 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 furniture polish

It is used as fire proof in textile

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

Na, Ca

Na, Cl

Cl, Br

Ca, Cl

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

Po

Fe

Pb

Te

260. In which form boron exist mostly in nature

Oxides

Sulphides

Oxyborates

Nitrides

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

Xe

Rn

Kr

Ar

262. Alkaline earth metals comes under

Representative elements

Inner transition elements

Transition elements

Halogens

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

Remains unchanged

Decreases down the group

Increases down the group

Variation is not regular

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

10

40

30

20

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

Fluorine cannot be prepared by electrolysis of fused metal fluorides

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

266. Which noble gas is used in labors?

Krypton

Neon

Helium

Argon

267. Which one boric acid is stable one?

H₂B₄O₇

HBO₃

H₃BO₃

None of these

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

NaCl

Chlorine

Ki

Iodine solution

269. Number of elements present in 5th period is

8

24

18

32

270. Which of the following is acidic?

BeO

HgO

SO₃

N₂O

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

High polarisability

Gaseous nature

Weak van der Waals forces between atoms

Inertness

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

Florigen

Chlorophyll

ATP

Haemoglobin

273. The last orbit of argon would have electrons

18

2

6

8

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

Flint glass

Crooke’s glass

Soda glass

Borosilicate glass

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

Iron

Aluminum

Zinc

Copper

Page 12 of 14

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

Ferromagnetic

Antiferromagnetic

Diamagnetic

Paramagnetic

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

NaBr

NaF

Nal

NaCl

278. Heavy water is obtained by

Dissolving heavy salt in water

Prolonged electrolysis of water

Removing impurities of calcium and magnesium form water

Simple distillation of water

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

CaCO₃

Ca and CO₂

CaO

CaC₂

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

They have high electron affinity and ionization energy

All the halogens react with noble gases to form their halides

All the halogens have electronic configuration ns2P5

All are non-metals

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

Their ions are isoelectronic with noble gases

High ionization energy

Low electronegativity

Low melting point

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

None of these of M²⁺ ions

High energies of hydration of M²⁺ in solution

High lattice energy of M²⁺ ions in the solid state

Diamagnetic nature

283. Among noble gases xenon gives compounds due to

Higher I-P

Zero electron affinity

Large size

Structure

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

Mixture of helium and oxygen

Mixture of neon and oxygen

Mixture of xenon and nitrogen

Mixture of argon and oxygen

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

Borazole is electron deficient compound

Borazole is nonpolar compound

Borazole is polar compound

Of localized electrons in it

286. The most powerful oxidizing agent among the halogens is

Br₂

I₂

F₂

Cl₂

287. Permonosulphuric acid is known as

Carlo’s acid

Sulphuric acid

Marshall’s acid

None of these

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

Tri-calcium silicate

Diclacium silicate

Tri-calcium aluminate

Tetra calcium aluminoferrite

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

Sodium amide

Sodium nitride

Sodium azide

Sodium hydride

290. White enamel of our teeth is

CaBr₂

CaF₂

Ca₃(PO₄)₂

CaCl₂

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

Large atomic size

Strongly bond valence electrons

Metallic properties

Small ionic size

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

Ionization energy

Lattice energy

Hydration energy

Electron affinity

293. Among the halogens the rare element is

Astatine

Iodine

Fluorine

Chlorine

294. Which one is the biggest ion?

Al³⁺

Mg²⁺

Na⁺

Ba²⁺

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

As

O

P

Si

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

Cl

F

S

I

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

In sea

As salts in ponds

In lakes

In the atmosphere

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

CaO

CO₂

SiO₂

SnO₂

299. What is more true about alkali metals?

Both oxidizing and reducing agents

Hydrolyzing agents

Oxidizing agents

Reducing agents

300. SO3 is not dissolve directly in H2O because

The reaction does not go to completion

The reaction is quite slow

The reaction is highly exothermic

SO₃ is insoluble in H₂O

Page 13 of 14

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

Gallium and Germanium

Aluminum and silicon

Iron and sulphur

Proton and silicon

302. Polyanion formation is maximum in

Oxygen

Nitrogen

Boron

Sulphur

303. The element that does not form a monoxide is

Silicon

Lead

Tin

Germanium

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

Pb

S

Si

Fe

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

Phosphorus

Copper

Mercury

Magnesium

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

Fourth

Sixth

Third

Fifth

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

Sodium amide

Solvated electrons

Sodium hydride

Sodium atoms

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

K

Ba

Rb

Li

309. Which is the strongest acid

HCL

HCLO4

Cannot be predicted

HNO3

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

Al₂O₃

NH₃

CO₂

CO

311. NaoH is named as caustic soda because

It reacts with chlorine gas

It is used in soda water

It corrodes the organic tissues

It reacts with fats to form soap

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

I₂>Br₂>U₂>F₂

U₂>Br₂>I₂>F₂

I₂>F₂>Br₂>U₂

F₂>Cl₂>Br₂>I2

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

Cs

Cu

Ba

Cr

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

Mg > Na > Al > Si

Al > Mg > Na > Si

Na > Mg > Al > Si

Si > Mg > Al > Na

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

A sulphate

A nitrate

A bromide

A carbonate

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

More electro negativity of fluorine

More electron repulsion in fluorine

Non-metallic nature of fluorine

Small size of fluorine

317. Electropositive character increase down the group due to

Decrease in electronegativity of the elements

Decrease in I.P

All of these

Increase in atomic size of elements

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

Rn

Fr

Ra

Lr

319. All halogen are

Reducing agents

Oxidizing as well as reducing agents

Drying agents

Oxidizing agents

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

Boiling point

Ionization energy

Density

Atomic radius

321. The noble gases are

Diatomic

Polyatomic

Monoatomic

All of these

322. The correct formula of Plaster of Paris is

CaSO₄

CaSO₄. 3H₂O

CaSO₄.2H₂O

CaSO₄. 1/2H₂O

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

Ionic radius

First ionization energy

Electro negativity

Melting point

324. The halogen having highest electron affinity is

Fluorine

Iodine

Chlorine

Bromine

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

Cl

I

F

Br

Page 14 of 14

326. AlCl₃ flumes in moist air because

HCl is formed in moist air

It is very volatile

It is covalent

It is highly hygroscopic

327. 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

328. The one which does not show variable valency is

Titanium

Copper

Barium

Lead

329. Cl₂O₇ is best prepared by passing by

Hydrogen chloride over phosphorus pentoxide

Chlorine and oxygen over hot silver chlorate

Perchloric acid (CHIO₄) over hot silver oxide

Chlorine gas over hot HgO

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

CO₂ and Ar

O₂ and CO₂

O₂ and He

O₂ and Ar

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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Chemistry The Halogens and Noble Gases Online Mcqs Test

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Important Chemistry The Halogens and Noble Gases Question and Answer

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