MDCAT Chemistry The Halogens and Noble Gases Online Test

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Chemistry

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

Nitrous oxide

Nitrogen dioxide

Nitric oxide

Dinitrogen tetraoxide

2. The element that does not form a monoxide is

Germanium

Tin

Lead

Silicon

3. Which statement is true about IV A group

Marked change of properties

Whole group consist of non-metals

Abrupt change of properties

There is a regular gradation of properties from top to bottom

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

Weak oxidizing agents

Weak reducing agents

Strong oxidizing agents

Strong reducing agents

5. Which of the following is most volatile?

HCl

HBr

HF

HI

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

Magnesium ammonium phosphate

Magnesium sulphates

Calcium sulphates

Ferrous ammonium sulphate

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

Hypo phosphorous acid

Metaphosphoric acid

Orthophosphoric acid

Pyro phosphoric acid

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

Bauxite is available in large quantity

Bauxite contains maximum of Al

Of easy extraction of Al from it

Bauxite is less impure

9. Deliquescence is a process in which a solid

Loses water of crystallization

Increases the water of crystallization

Absorbs moisture and turn into liquid

Absorbs moisture and remain solid

10. The shape of gaseous SnCl₂ is

Linear

Angular

Tetrahedral

t-shaped

11. Which of the following phosphorus is most reactive?

Scarlet phosphorus

Violet phosphorus

White phosphorus

Red phosphorus

12. Sea weeds are important source of

Iron

Chlorine

Bromine

Iodine

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

Br > Cl > F

F > Cl > Br

F > Br > Cl

Cl > F > Br

14. Identify the correct statement

Gypsum is obtained by heating 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 contains a lower percentage of calcium than plaster of pairs

15. 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

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

Strongly bond valence electrons

Large atomic size

Metallic properties

Small ionic size

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

Hl

HCl

HF

HBr

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

HF molecules form intermolecular H-bonds

Fluorine atom is smaller in size

Fluorine is highly reactive

HF is the weakest acid

19. Which statement is correct?

None of these

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

Noble gases will all burn in pure oxygen

Noble gases are all dense gases

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

Ar

O₂

H₂

He

21. Heavy water is obtained by

Removing impurities of calcium and magnesium form water

Dissolving heavy salt in water

Simple distillation of water

Prolonged electrolysis of water

22. The type of hybridization of born in diborane is

Sp-hybridisation

Sp³d²-hybridisation

Sp³- hybridization

Sp²-hybridisation

23. The metal used for making radiation shield is

Zn

Fe

Pb

Al

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

Na₃PO₄

Active charcoal

Anhydrous calcium chloride

Phosphorus pentoxidse

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

18

10

8

32

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

Ar

Xe

Kr

Rn

27. Which one has highest electron affinity?

I

F

Cl

Br

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

2NaOH + CO₂ → Na₂CO₃ + H₂O

NH₃ + H₂CO₃ → NH₄HCO₃

NaCl + NH₄HCO₃ → NaHCO₃ + NH₄Cl

CO₃ + H₂O → H₂CO₃

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

Magnesium and chlorine

Potassium only

Potassium and magnesium

Magnesium only

30. Mark the compound which does not exist

SbCl₅

PF₅

AsF₅

NCl₅

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

Insoluble in water

Variable trend

Less soluble in water

Highly soluble in water

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

Iodine

Chlorine

Fluorine

Bromine

33. The noble gases are

Monoatomic

All of these

Polyatomic

Diatomic

34. Which gives green colour in fireworks?

Barium

Calcium

Sodium

Potassium

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

I₂

F₂

Br₂

Cl₂

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

Has the largest size

In the most readily available gas

Has the lowest ionization enthalpy

Has the highest heat of vaporization

37. Which halogen has application in medicines mostly?

None

Br2

Cl₂

I₂

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

Francium

Polonium

Astatine

Radium

39. XeF₄ involves which hybridization

Sp

Sp²

Sp³d²

Sp²d

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

Pb

Po

Te

Fe

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

I

Cl

F

Br

42. Which shows maximum catenation property?

Te

S

O

Se

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

Noble gases have o heat of vapourization

It increases gradually down the group

It decreases gradually down the group

None of these

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

Noble gases

Halogens

Light metals

Heavy metals

45. 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 bromide

A nitrate

A sulphate

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

Nitrogen is highly soluble in water

Helium is much less soluble in blood than nitrogen

Nitrogen is much less soluble in blood than helium

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

47. Cl₂O₇ is best prepared by passing by

Chlorine and oxygen over hot silver chlorate

Hydrogen chloride over phosphorus pentoxide

Chlorine gas over hot HgO

Perchloric acid (CHIO₄) over hot silver oxide

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

It is more reactive than other halogens

It restricts to oxidation state – 1 only

It has highest first I.E

It has highest E.N

49. The alkali metals

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

Form salt like hydrides

Form salts which are predominantly covalent

Show increasing electro negativity from Li to Cs.

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

Sodium persulphate

Sodiums sulphates

Sodium thiosulphate

Sodium sulphides

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

Solvay

Chamber

Haber

Castner

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

Mixture of xenon and nitrogen

Mixture of helium and oxygen

Mixture of argon and oxygen

Mixture of neon and oxygen

53. The most powerful oxidizing agent among the halogens is

F₂

Br₂

I₂

Cl₂

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

Energy dissociation

High atomic number

Electron affinity

Hydration energy of ion

55. The percentage of lead in lead pencil is

70

Zero

20

80

56. Permonosulphuric acid is known as

None of these

Sulphuric acid

Carlo’s acid

Marshall’s acid

57. 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

58. Which is the strongest acid

HNO3

HCL

HCLO4

Cannot be predicted

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

Fe

Mg

Na

Al

60. Which gas can support combustion?

CO

CO₂

N₂

N₂O

61. The acid which has a peroxy linkage is

Carlo’s acid

Pyrosulphuric acid

Sulphurous acid

Dithionic acid

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

Cs

Cu

Ba

Cr

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

CaO has high m.p.

Lattice energy of CaO is much higher than that of Kl

Kl is soluble in benzene

Kl has high m.p.

64. Halogens exist in the form of

Diatomic molecules

Various forms

Cannot be predicted

Monoatomic molecules

65. 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

III group radicals are precipitated as hydroxides

IV group radicals are precipitated as sulphides

Of the oxidation of H₂S gas by some acid radicals

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

Cl

I

Br

F

67. Which noble gas is used in labors?

Krypton

Helium

Argon

Neon

68. AlCl₃ flumes in moist air because

It is highly hygroscopic

HCl is formed in moist air

It is covalent

It is very volatile

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

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

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

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

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

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

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

HCl

HI

HF

HBr

71. The colour of I₂ in CCI₄ is

Colourless

Violet

Bluish green

Radish brown

72. The following has zero valency

Be

Al

Kr

Na

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

Br

Cl

F

I

74. The ionization potential is lowest for the

Halogens

Inert gases

Alkali metals

Alkaline earth metals

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

Greater hardness

Lower ionization energies

Smaller ionic radii

Highest boiling points

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76. 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

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

HI

HF

HU

HBr

78. 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

79. The halogen that is most easily reduced is

Cl₂

Br₂

I₂

F₂

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

Cl

I

S

F

81. Which one is hygroscopic in nature?

HBr

HUO4

HNO3

HCL

82. 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

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

The basic character of the oxides

The stability of +2 oxidation state

The first ionization energy

Ionic character of the compound

84. Which is valence shell configuration of halogens?

ns₂, nP₅

nS₂, nP₆

nS₂, nP₃

NS₂, nP₄

85. Freon-12 is used as a

Insecticide

Fungicide

Herbicide

Refrigerant

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

M₂O

MO

M₂O₃

MO₂

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

Ca and CO₂

CaC₂

CaCO₃

CaO

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

Lose 3 electrons

Gain 3 electrons

Lose 2 electrons

Gain 2 electrons

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

Cl₂

I₂

F₂

Br₂

90. Which of the following is acidic?

BeO

SO₃

HgO

N₂O

91. Plaster of Paris is used

As a plaster for walls

In dentistry and surgery

As a drying agent

In metallurgical process

92. Nitrolim is

CaCN₂ + C

All

CaC₂ + C

Ca(CN)₂ + C

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

Ne is obtained during radioactive disintegration

HE is used in producing very low temperatures

Half-life of Rn is only 3-8 days

Ar is used in electric bulbs

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

None

Lower electro positivity

Low charge density

Low electronegativity

95. 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

96. Mark the element which shows greatness inert pair effect

Iodine

Bromine

Chlorine

Fluorine

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

Proton and silicon

Iron and sulphur

Gallium and Germanium

Aluminum and silicon

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

Greater hardness of Li

Extremely high electropositivity of Li

Small size of lithium atom and Li⁺ ion

Hydration of Li⁺ ion

99. The melting point in lowest for

Mg

Ca

Sr

Be

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

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

None of these

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

There is no change in the nuclear charge

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101. Which of the noble gas has highest polarizabilities?

He

Kr

Xe

Ar

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

Barium

Strontium

Beryllium

Calcium

103. HNO₂ acts as an/a

Reducing agent

Oxidizing agent

Acid

All the three

104. Sulphuric acid reacts with PCl₅ to give

Sulphur tetrachloride

Sulphur monochloride

Sulphuryl chloride

Thionyl chloride

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

Ba

Li

K

Rb

106. Boron compounds behave as Lewis acid because of their

Ionization property

Electron deficiency

Covalent nature

Acidic nature

107. In which form boron exist mostly in nature

Nitrides

Sulphides

Oxides

Oxyborates

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

O₂ and Ar

CO₂ and Ar

O₂ and He

O₂ and CO₂

109. The noble gas forming the maximum number of compounds

Xe

Ne

He

Ar

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

In the atmosphere

In lakes

In sea

As salts in ponds

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

Fourth

Third

Sixth

Fifth

112. Which one of these is most reactive?

K

Pb

Na

Mg

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

Dipole-dipole forces

Strongest vanderwaal’s force

H. bonding

None of these

114. 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

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

Carbon dioxide

Iodide

Chlorine

Sulphur dioxide

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

Rn

Fr

Lr

Ra

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

CO

NH₃

Al₂O₃

CO₂

118. Among noble gases xenon gives compounds due to

Large size

Structure

Zero electron affinity

Higher I-P

119. Fluorine differs from other halogens due to

All

Small size

High dissociation energy

Low first ionization energy

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

Iron from haematite

Ordinary (soda lime) glass

Solvay process of sodium carbonate

Phosphorus from phosphorite

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

Oxygen

Carbon

Nitrogen

Boron

122. NaOH is prepared by the method

Castner cell

Down’s cell

Castner Kellner cell

Solvay process

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

F₂ > Cl₂ > Br₂ > I₂

Br₂ > Cl₂ > F₂ > I₂

Cl₂ > Br₂ > I₂ > F₂

I₂ > Br₂ > Cl₂ > F₂

124. Pyrex glass is a mixture of

Sodium silicate and calcium silicate

Sodium borosilicate and aluminum borosilicate

Sodium silicate and aluminum borosilicate

Sodium silicate and lead silicate

125. Crystalline form of sulphur stale at room temperature is

Plastic sulphur

Prismatic sulphur

Rhombic sulphur

Monoclinic sulphur

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126. Which of the following is an inert gas?

N₂

Argon

H₂

O₂

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

p-orbitals

None

d-orbitals

s-orbitals

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

I₂>Br₂>U₂>F₂

F₂>Cl₂>Br₂>I2

U₂>Br₂>I₂>F₂

I₂>F₂>Br₂>U₂

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

It is as filter for soap

It is used as fire proof in textile

It is used in the formation white cement

It is used furniture polish

130. Vander Waals forces are stronger in

Cl₂

I₂

Br₂

F₂

131. Which one has least dissociation energy?

HCL

HBr

HI

HF

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

Magnesium

Cobalt

Chromium

Iron

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

Developing interlocking needle like crystals of hydrated silicates

Keeping it cool

Hydrating sand and gravel mixed with cement

Converting sand into silici acid

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

XeF₃

XeF₄

XeF₂

XeF₆

135. Alkaline earth metals comes under

Inner transition elements

Transition elements

Halogens

Representative elements

136. Electron affinity depends on

Atomic size and nuclear charge both

Atomic size

Nuclear charge

Atomic number

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

Mg > Na > Al > Si

Si > Mg > Al > Na

Na > Mg > Al > Si

Al > Mg > Na > Si

138. All halogen are

Drying agents

Reducing agents

Oxidizing agents

Oxidizing as well as reducing agents

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

HeF₄

CF₄

XeF₄

SF₄

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

F¯

O²¯

Li⁺

B³⁺

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

Calcium oxide

Hypochlorous acid

Chlorine

Oxygen

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

It changes into CaCl₂ and Ca(OH)₂

It change into calcium hypochlorate

It changes into calcium chloride and calcium chlorate

It absorbs moisture

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

With alkali metals

None of these

With halogens

With inert gases

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

O

U

F

Br

145. Which one of them is monoatomic?

Oxygen

Neon

Fluorine

Nitrogen

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

Sodium atoms

Sodium amide

Sodium hydride

Solvated electrons

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

2

1½

½

5/2

148. SO3 is not dissolve directly in H2O because

The reaction is quite slow

The reaction is highly exothermic

The reaction does not go to completion

SO₃ is insoluble in H₂O

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

Decreases down the group

Variation is not regular

Increases down the group

Remains unchanged

150. Calico printing means

Leather printing

Paper printing

Glass printing

Cloth printing

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

BaSO₄

CuSO₄

KCl

NaCl

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

Heat of hydration

Ionization potential

Electron affinity

Heat of dissociation

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

30

40

20

10

154. Variable valency is characteristic of

Halogen

Noble gas

Alkali metals

Transition elements

155. The most abundant inert gas in the atmosphere is

Kr

Ar

He

Ne

156. The structure of XeF₆

Pyramidal

None of these

Tetrahedral

Distorted octahedral

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

Covalent

Ionic

Coordinate

Metallic

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

The ratio of their charge to size is nearly the same

Both are found together in nature

Both have nearly the same size

Both have similar electronic configurations

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

Na, Cl

Ca, Cl

Na, Ca

Cl, Br

160. Sulphuric acid has great affinity for water because

Acid forms hydrates with water

It decomposes the acid

It hydrolyses the acid

Acid decomposes water

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

Borosilicate glass

Flint glass

Soda glass

Crooke’s glass

162. Which of the following has greatest reducing power?

HBr

HI

HCl

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

Moisture

None of these

Dry air

Sun light

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

NaF

NaCl

NaBr

Nal

165. Cassiterite is an ore of

Sn

Mn

Ni

Sb

166. Strongest reducing agent is

HBr

HF

Hl

HCl

167. Which one is the weakest oxyacid of chlorine?

HCIO₂

HCIO₄

HCIO

HCIO₃

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

Converting silver halides to metallic silver

Dissolving out unreacted silver bromide

Preventing overdeveloping and fogging

Reducing solubility of AgBr

169. The name of CaSO₄. ½ H₂O is

Epsom salt

Dolomite

Gypsum

Plaster of Paris

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

Cl

Br

F

I

171. Which of the halogen has highest electronegativity?

Fluorine

Iodine

Bromine

Chlorine

172. The most acidic of the following compounds is

B₂O₃

P₂O₃

As₂O₃

Sb₂O₃

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

400

250

1000

200

174. P₂O₅ is heated with water to give

Hypo phosphorous acid

Hypo phosphoric acid

Orthophosphoric acid

Phosphorous acid

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

He

N

Li

Zn

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176. Which is the strongest acid?

HClO₄

HClO₃

HClO

HClO₂

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

Zinc

Lead

Sodium

Silver

178. Mark the correct statement

Br is more reactive than Cl₂

None of these

Iodine is a solid

Cl₂ is more insoluble in water

179. An atom with high electro negativity has

High ionization potential

Low ionization potential

Large size

Low electron affinity

180. Aluminum (III) chloride forms a dimer because

Al belongs to third group

Higher co-ordination can be achieved by Al

It cannot form a trimer

Al has high ionization energy

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

10

18

2

54

182. Who reported first noble gas?

Frank land

Ramsay

J.J Thomson

Cavendish

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

In form of foil for wrapping

As an oxidizer in metallurgy

As an abrasive in the form of abundum

For preparing artificial

184. Calcium is obtained by

Electrolysis of solution of calcium chloride in water

Reduction of calcium chloride with carbon

Roasting lime stone

Electrolysis of molten anhydrous or fused calcium chloride

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

P

As

Si

O

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

Tl

Al

F

Si

187. Hydrochloric acid at 25°C is

Covalent and liquid

Ionic and gas

None of these

Ionic and liquid

188. Which is the most volatile compound?

HI

HF

HCl

HBr

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

Electron affinity

Hydration energy

Energy dissociation

High atomic number

190. Electropositive character increase down the group due to

Decrease in I.P

All of these

Increase in atomic size of elements

Decrease in electronegativity of the elements

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

Sodium amide

Sodium hydride

Sodium azide

Sodium nitride

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

O > B > C > N

B > N > C > O

O > C > B > N

O > C > N > B

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

Presence of NH₃

Reaction with NaOH

Reaction with CO₂

Reaction with brine solution

194. XeF₄ on partial hydrolysis produces

XeOF₄

XeO₃

XeF₂

XeOF₂

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

Atomic mass

Atomic number

Mass number

Isotopic number

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

Coke

Diamond

Graphite

Coal

197. The one which does not show variable valency is

Copper

Lead

Titanium

Barium

198. Number of elements present in 5th period is

24

32

8

18

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

Helium

Oxygen

Nitrogen

Neon

200. Which statement is correct about halogens?

They are all diatomic and form univalent 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 divalent ions

Page 9 of 14

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

Iron

Aluminum

Zinc

Copper

202. Mark the smallest atom

I

Cl

Br

F

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

Argon

Neon

Radon

Xenon

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

Copper

Iron

Lead

Sodium

205. The halogen having highest electron affinity is

Bromine

Fluorine

Chlorine

Iodine

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

Increase in resistance with increase in temperature

Decrease in resistance with increase in temperature

Decease in resistance with intensity of light

Different resistance under different circumstance

207. Mark the incorrect statement about ‘Li’

‘Li’ is not effected by air

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

‘Li’ combine with nitrogen directly to form Lithium nitride

‘Li’ has a great tendency to form hydrates

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

Linear, basic

Linear acidic

Tetrahedral, acidic

Angular, disc

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

12, 20, 56, 88

9, 17, 35, 53

37, 19, 3, 55

1, 12, 30, 4, 62

210. 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

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

Sodium carbonate

Calcium carbonate

Sodium bicarbonate

Calcium oxide

212. What causes nitrogen to be chemically inert?

Multiple bond formation in the molecule

Absence of bond polarity

Short internuclear distance

High bond energy

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

N/P ratio

Electro negativity

Ionization energy

Atomic radius

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

P > Si

Br > Cl

C > N

Sr > Ca

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

Chromic chloride

Chromous chloride

Chromyl chloride

None

216. Which halogen is most electropositive?

Cl

Br

F

I

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

Tri-calcium silicate

Tri-calcium aluminate

Diclacium silicate

Tetra calcium aluminoferrite

218. Common oxidation state of boron are

+1

+3

-3

+3,-3

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

Li⁺

Mg⁺

Ne

Al⁺

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

Fluorine does not form oxoacid

Bond energy of fluorine is less than that of chlorine

Electron affinity of chlorine is greater than that of fluorine

Fluorine cannot be prepared by electrolysis of fused metal fluorides

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

Nuclear neutron-proton number rations

Nuclear masses

Atomic numbers

Atomic masses

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

Be

C

Al

Si

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

Strong acid and weak base

Weak acid and strong base

Strong acid and strong base

Weak acid and weak base

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

Chlorine

Fluorine

Bromine

Iodine

225. Which of the following statements is incorrect?

Sodium is the most abundant metallic element in sea water

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

Page 10 of 14

226. Which of the following is not isoelectronic?

O²¯

Mg²⁺

Cl¯

Na⁺

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

Atomic mass increases

Atomic number increases

Additive electrons are accommodated in new electron level

Effective nuclear charge increases

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

Chlorophyll

Haemoglobin

ATP

Florigen

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

The lattice energy of BaSO₄ is more than its hydration energy

The hydration energy of Na₂SO₄ is more than its lattice energy

The lattice energy has no role to play in solubility

Both a and b

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

HBR

HCl

SO₂

H₂S

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

BaSO₄

MnS

BaCO₃

ZnS

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

Ar

Xe

He

Ne

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

Inter ionic attraction

Lattice energies if solids

Hydration energies of cations

Entropy of solution formation

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

Calomel

Alum

Borax

Gypsum

235. Mark the correct statement

Carbonates of Na, K, NH₄ are soluble in water

Carbonates of Ca, Ba, Sr are soluble in water

Basic carbonates of Mg and Cu are soluble in water

Li₂CO₃ is soluble in water

236. Identify the incorrect statement with respect to ozone.

Ozone is more reactive than dioxygen

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

Ozone is diamagnetic whereas dioxygen is paramagnetic

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

237. Which one halogen is radioactive?

Bromine

Chlorine

Astatine

Iodine

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

11

14

16

10

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

Ne

He

Rn

Ar

240. Electron affinity of sulphur is

Less than O but more than SE

Equal to O and Se

More than O and Se

More than O but less than Se

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

Radium

Polonium

Astatine

Francium

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

Li⁺

H

He⁺

Na

243. Neon glows in discharge tube as

Radish

Greenish

Bluish

Yellowish

244. Bond angle is minimum for

H₂O

H₂Te

H₂Se

H₂S

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

O₂

H₂

Cl₂

H₂O

246. All the elements of oxygen family are

Polymorphic

Radioactive

Metalloids

Non-metals

247. Which of the following has highest dipole moment?

PH₃

AsH₃

NH₃

SbH₃

248. The correct formula of Plaster of Paris is

CaSO₄. 1/2H₂O

CaSO₄.2H₂O

CaSO₄. 3H₂O

CaSO₄

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

Iodine

Chlorine

Bromine

Fluorine

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

Lattice energy solids

Hydration energies of cations

Inter – ionic attraction

Entropy of solution formation

Page 11 of 14

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

None of these

O₂-

O₂+

O₂

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

Bromine

Fluorine

Iodine

Chlorine

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

Low melting point

Low electronegativity

High ionization energy

Their ions are isoelectronic with noble gases

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

Free electrons

Free ions

Atoms of sodium and chlorine

Free molecules

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

Se

Po

None of these

Te

256. Which of the following oxides is peroxide?

SO₂

Mn₂O

BaO

Na₂O₂

257. 6NaOH + Cl₂ → 5Nacl + Naclo₃ in this reaction chlorine is

Both oxidized and reduced

No change

Reduced

Oxidized

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

Paramagnetic

Antiferromagnetic

Ferromagnetic

Diamagnetic

259. Which noble gas is used earth quake prediction?

Kr

He

Rn

Ar

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

Phosphorus trichloride

Nitrogen trichloride

Nitrosyl chloride

Hyponitrous acid

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

Three layers are maintained at different temperatures

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

There is special arrangement is cell to keep the layers separate

Three layers have different densities

262. I₂ is solid at room temperature because

Its molecule has a large size

It is highly electronegative

It possess hydrogen bonding

It has metallic bond

263. The important ore of lead is

Bauxite

Haematite

Chalcopyrites

Galena

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

N

C

P

Li

265. Alkali metals are generally extracted by

Electrolytic methods

Displacement methods

Double decomposition methods

Reduction methods

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

Atomic radius

Ionization energy

Density

Boiling point

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

14

7

16

12

268. A clathrate may be defined as a

Mixture

Cage compound

Liquid crystal

Solid solution

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

Ki

NaCl

Iodine solution

Chlorine

270. 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?

CO₂

CaO

SiO₂

SnO₂

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

Electro negativity

First ionization energy

Melting point

Ionic radius

272. 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

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

Si

S

Fe

Pb

274. The bleaching action of chlorine is due to

Oxidation

Hydrogenation

Reduction

Chlorination

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

Sr

Mg

Ba

Ca

Page 12 of 14

276. The noble gases consist of

Triatomic molecules

Atoms linked by weak bonds

Single free atoms

Diatomic molecules

277. Mark the nitrate which decomposes differently on heating

LiNO₃

NaNO₃

KNO₃

RbNO₃

278. The last orbit of argon would have electrons

18

2

8

6

279. 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

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

Atomic radius

Density

Boiling point

Ionization energy

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

Electron affinity

Ionization energy

Hydration energy

Lattice energy

282. 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

Greater amount of nitrogen molecules derived from N¹⁵ isotope

Argon

283. Hypo is used in photography for

The colour of picture

Developing picture

The fixation of picture

Picture printed

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

OH¯

K⁺

O³¯

O₂¯²

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

Alkali metals

Oxygen family

Halogens

Nitrogen family

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

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

Their ionization potential is less than that of other elements

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

They contain only one electron in their outermost shell

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

K

Na

Cs

Rb

288. 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

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

H₂

Na

Cl₂

O₂

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

It forms RX₂

It has oxidation state of +4

It forms R₂O₃

It is a gas at room temperature

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

NaAlO₂

Na₂Al(OH)₄

Al₂(OH)₄

Na₃AlO₃

292. What is more true about alkali metals?

Both oxidizing and reducing agents

Reducing agents

Hydrolyzing agents

Oxidizing agents

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

Br

F

Cl

I

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

Sodium amide

Sodium atoms

Sodium hydride

Solvated electrons

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

Phosphorus

Copper

Mercury

Magnesium

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

Small ionic size of Li⁺

High ∆H lattice

High covalent nature

Low ∆H lattice

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

Expense, but a very uncreative gas

Lighter than air and cheap to produce

Less dense then air and not flammable

Expensive but easy to store in cylinder

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

O₂

CO

H₂O₂

CO₂

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

Alumina

Iron oxide

Magnesia

Silica

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

Chloride ion

Fluoride ion

Nitride ion

Sodium ion

Page 13 of 14

301. The halogen which has only one oxidation state is

I

Cl

Br

F

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

Potassium chlorate

Mercuric oxide

Lead nitrate

Manganese dioxide

303. Which halogen have most corrosive action on skin?

F₂

Br₂

Chlorine

I₂

304. The substance not likely to contain CaCO₃ is

Dolomite

Sea shells

A marble states

Calcried gypsum

305. Select the weakest acid among the following

HCl

HBr

HI

HF

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

To act as reducing agent

To make a conducting solution of bauxite

To increase Al production

To protect the anodes

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

A

D

B

C

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

Cl¯

S²¯

K⁺

Ca²⁺

309. Orthophosphoric acid is

Monobasic

Dibasic

Tribasic

Tetrabasic

310. Among the halogens the rare element is

Chlorine

Fluorine

Astatine

Iodine

311. Identify the correct statement

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

Elemental Na is easily oxidized

Elemental Na is insoluble in NH₃

Elemental Na is a strong oxidizing agent

312. Which one boric acid is stable one?

None of these

H₂B₄O₇

H₃BO₃

HBO₃

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

All the halogens react with noble gases to form their halides

All the halogens have electronic configuration ns2P5

All are non-metals

They have high electron affinity and ionization energy

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

44%

11%

33%

22%

315. The noble gas He was discovered by

Rutherford

Chadwick

Dorn

Frank land and Lockyer

316. Polyanion formation is maximum in

Boron

Oxygen

Nitrogen

Sulphur

317. 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

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

Radon

Helium

Neon

Argon

319. White enamel of our teeth is

CaCl₂

Ca₃(PO₄)₂

CaF₂

CaBr₂

320. Which one is the biggest ion?

Al³⁺

Ba²⁺

Na⁺

Mg²⁺

321. Which of the following is most electronegative?

Silicon

Lead

Carbon

Tin

322. Bromine is obtained on a commercial scale from

Carnallite

Common salt

Cryolite

Caliche

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

Rb

Cl

Mg

Li

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

Ne

B

Li

F

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

Inertness

High polarisability

Gaseous nature

Weak van der Waals forces between atoms

Page 14 of 14

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

2,8

2,8,2

2,8,18,2

2,8,7

327. Which of the following is most electronegative?

Pb

Sn

Si

C

328. Oxygen shows oxidation states

-2, +2, +6

-2

+2, -2

+2, +4, +6

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

Helium

Neon

Krypton

Argon

330. NaoH is named as caustic soda because

It is used in soda water

It corrodes the organic tissues

It reacts with fats to form soap

It reacts with chlorine gas

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 MCQS Online Test

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