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Chemistry The Halogens And Noble Gases Online Mcqs Test

Page 1 of 14

Chemistry

1. The noble gases are

Polyatomic

Diatomic

Monoatomic

All of these

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

Fe

Si

S

Pb

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

O₂ and He

O₂ and Ar

CO₂ and Ar

O₂ and CO₂

4. XeF₄ involves which hybridization

Sp

Sp³d²

Sp²d

Sp²

5. I₂ is solid at room temperature because

It possess hydrogen bonding

Its molecule has a large size

It has metallic bond

It is highly electronegative

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

Precipitate Mg

Leads to the dissolution of beryllium metal

Have no effect

Precipitate Mg metal

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

Cl

Rb

Li

Mg

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

U

O

Br

F

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

Copper

Mercury

Magnesium

Phosphorus

10. Permonosulphuric acid is known as

Marshall’s acid

None of these

Carlo’s acid

Sulphuric acid

11. Which one halogen is radioactive?

Bromine

Chlorine

Iodine

Astatine

12. 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

800 mL

200mL

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

Gain 3 electrons

Lose 2 electrons

Gain 2 electrons

Lose 3 electrons

14. White enamel of our teeth is

Ca₃(PO₄)₂

CaF₂

CaBr₂

CaCl₂

15. Which noble gas is used earth quake prediction?

Rn

Ar

He

Kr

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

Sodium

Lead

Iron

Copper

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

O₂¯²

O³¯

OH¯

K⁺

18. Mark the correct statement

Basic carbonates of Mg and Cu are soluble in water

Carbonates of Ca, Ba, Sr are soluble in water

Li₂CO₃ is soluble in water

Carbonates of Na, K, NH₄ are soluble in water

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

Ar

He

Ne

Xe

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

Ne

Al⁺

Li⁺

Mg⁺

21. The percentage of lead in lead pencil is

Zero

80

70

20

22. Mark the correct statement

Iodine is a solid

Br is more reactive than Cl₂

None of these

Cl₂ is more insoluble in water

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

As an oxidizer in metallurgy

In form of foil for wrapping

For preparing artificial

As an abrasive in the form of abundum

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

Te

Po

Fe

Pb

25. Which of the following is correct?

Magnesium reacts with cold water and liberates hydrogen

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

Sodium reduces CO₂ to carbon

Magnallium is one alloy of Mg and zinc

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26. The metal used for making radiation shield is

Pb

Zn

Fe

Al

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

Crooke’s glass

Soda glass

Borosilicate glass

Flint glass

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

Reaction with NaOH

Presence of NH₃

Reaction with brine solution

Reaction with CO₂

29. Identify the correct statement

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

Elemental Na is easily oxidized

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

I₂>Br₂>U₂>F₂

I₂>F₂>Br₂>U₂

F₂>Cl₂>Br₂>I2

U₂>Br₂>I₂>F₂

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

Gypsum

Calomel

Borax

Alum

32. Which of the following oxides is peroxide?

SO₂

Mn₂O

BaO

Na₂O₂

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

It absorbs moisture

It changes into CaCl₂ and Ca(OH)₂

It changes into calcium chloride and calcium chlorate

It change into calcium hypochlorate

34. Which of the following phosphorus is most reactive?

Violet phosphorus

Scarlet phosphorus

White phosphorus

Red phosphorus

35. Which of the following is not isoelectronic?

Mg²⁺

Cl¯

Na⁺

O²¯

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

Fluorine

Chlorine

Iodine

Bromine

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

Sodium sulphides

Sodiums sulphates

Sodium persulphate

Sodium thiosulphate

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

Copper

Aluminum

Zinc

Iron

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

CO₂

CO

H₂O₂

O₂

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

Tetra calcium aluminoferrite

Diclacium silicate

Tri-calcium silicate

Tri-calcium aluminate

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

Francium

Astatine

Radium

Polonium

42. Hypo is used in photography for

The colour of picture

Picture printed

Developing picture

The fixation of picture

43. Which of the following statements is incorrect?

Ionic character of alkali metal halides decreases down the group

Melting and boiling points of alkali metals decrease down the group

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

Sodium is the most abundant metallic element in sea water

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

Fr

Rn

Lr

Ra

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

Ca

Ba

Mg

Sr

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

Ionization energy

Atomic radius

N/P ratio

Electro negativity

47. The halogen that is most easily reduced is

I₂

Br₂

Cl₂

F₂

48. Who reported first noble gas?

J.J Thomson

Ramsay

Frank land

Cavendish

49. Vander Waals forces are stronger in

F₂

Br₂

I₂

Cl₂

50. The most acidic of the following compounds is

Sb₂O₃

P₂O₃

B₂O₃

As₂O₃

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

Oxygen family

Alkali metals

Halogens

Nitrogen family

52. 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

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

Rb

K

Cs

Na

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

Both have similar electronic configurations

The ratio of their charge to size is nearly the same

Both have nearly the same size

Both are found together in nature

55. Bond angle is minimum for

H₂Se

H₂S

H₂Te

H₂O

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

11

10

16

14

57. Sea weeds are important source of

Iron

Bromine

Chlorine

Iodine

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

Cl₂

H₂

Na

O₂

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

Sodium

Silver

Lead

Zinc

60. Neon glows in discharge tube as

Greenish

Bluish

Radish

Yellowish

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

Sulphur dioxide

Iodide

Chlorine

Carbon dioxide

62. 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

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

It is used in the formation white cement

It is as filter for soap

It is used furniture polish

It is used as fire proof in textile

64. HNO₂ acts as an/a

Reducing agent

Acid

All the three

Oxidizing agent

65. AlCl₃ flumes in moist air because

It is covalent

It is highly hygroscopic

It is very volatile

HCl is formed in moist air

66. SO3 is not dissolve directly in H2O because

The reaction does not go to completion

SO₃ is insoluble in H₂O

The reaction is quite slow

The reaction is highly exothermic

67. Alkaline earth metals comes under

Representative elements

Transition elements

Inner transition elements

Halogens

68. 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

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

Cl

Br

I

F

70. Which is valence shell configuration of halogens?

nS₂, nP₆

nS₂, nP₃

NS₂, nP₄

ns₂, nP₅

71. 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

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

Low electronegativity

Low melting point

High ionization energy

Their ions are isoelectronic with noble gases

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

Ionic

Covalent

Coordinate

Metallic

74. The last orbit of argon would have electrons

18

2

8

6

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

Castner

Chamber

Solvay

Haber

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76. 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

SiO₂

CO₂

SnO₂

77. An atom with high electro negativity has

Large size

High ionization potential

Low electron affinity

Low ionization potential

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

CO

NH₃

Al₂O₃

CO₂

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

Chlorine

Fluorine

Bromine

Iodine

80. Identify the incorrect statement with respect to ozone.

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

Ozone is more reactive than dioxygen

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

More electro negativity of fluorine

More electron repulsion in fluorine

Small size of fluorine

Non-metallic nature of fluorine

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

High lattice energy of M²⁺ ions in the solid state

High energies of hydration of M²⁺ in solution

None of these of M²⁺ ions

Diamagnetic nature

83. Select the weakest acid among the following

HBr

HI

HF

HCl

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

Hl

HCl

HBr

HF

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

MO₂

M₂O₃

MO

M₂O

86. 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 bromide

A nitrate

A carbonate

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

Diamond

Graphite

Coal

Coke

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

Argon

Xenon

Radon

Neon

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

O₂-

O₂

O₂+

None of these

90. The ionization potential is lowest for the

Alkaline earth metals

Halogens

Alkali metals

Inert gases

91. Polyanion formation is maximum in

Boron

Nitrogen

Sulphur

Oxygen

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

2

1½

5/2

½

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

F

I

Cl

Br

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

HI

HCl

HBr

HF

95. The most powerful oxidizing agent among the halogens is

Cl₂

Br₂

F₂

I₂

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

Additive electrons are accommodated in new electron level

Atomic mass increases

Atomic number increases

Effective nuclear charge increases

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

Sodium hydride

Sodium atoms

Solvated electrons

Sodium amide

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

Large atomic size

Small ionic size

Strongly bond valence electrons

Metallic properties

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

Third

Sixth

Fourth

Fifth

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

Weak reducing agents

Strong oxidizing agents

Weak oxidizing agents

Strong reducing agents

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

NaCl + NH₄HCO₃ → NaHCO₃ + NH₄Cl

2NaOH + CO₂ → Na₂CO₃ + H₂O

NH₃ + H₂CO₃ → NH₄HCO₃

CO₃ + H₂O → H₂CO₃

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

Nitrogen trichloride

Nitrosyl chloride

Phosphorus trichloride

Hyponitrous acid

103. Which of the noble gas has highest polarizabilities?

He

Xe

Kr

Ar

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

Hydration energy of ion

High atomic number

Energy dissociation

Electron affinity

105. Boron compounds behave as Lewis acid because of their

Covalent nature

Ionization property

Electron deficiency

Acidic nature

106. Sulphuric acid reacts with PCl₅ to give

Thionyl chloride

Sulphur tetrachloride

Sulphur monochloride

Sulphuryl chloride

107. The noble gases consist of

Triatomic molecules

Diatomic molecules

Atoms linked by weak bonds

Single free atoms

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

I

F

Br

Cl

109. A clathrate may be defined as a

Solid solution

Cage compound

Liquid crystal

Mixture

110. XeF₄ on partial hydrolysis produces

XeOF₂

XeF₂

XeO₃

XeOF₄

111. Which statement is true about IV A group

Whole group consist of non-metals

There is a regular gradation of properties from top to bottom

Marked change of properties

Abrupt change of properties

112. Among noble gases xenon gives compounds due to

Zero electron affinity

Large size

Higher I-P

Structure

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

S

I

Cl

F

114. Cl₂O₇ is best prepared by passing by

Hydrogen chloride over phosphorus pentoxide

Chlorine and oxygen over hot silver chlorate

Chlorine gas over hot HgO

Perchloric acid (CHIO₄) over hot silver oxide

115. The colour of I₂ in CCI₄ is

Bluish green

Violet

Radish brown

Colourless

116. Which of the following has greatest reducing power?

HI

HCl

HBr

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

F

Tl

Si

Al

118. The substance not likely to contain CaCO₃ is

Calcried gypsum

Dolomite

Sea shells

A marble states

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

Magnesium

Chromium

Iron

Cobalt

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

I

Br

Cl

F

121. Common oxidation state of boron are

+3,-3

+3

+1

-3

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

Metaphosphoric acid

Orthophosphoric acid

Hypo phosphorous acid

Pyro phosphoric acid

123. Variable valency is characteristic of

Halogen

Transition elements

Noble gas

Alkali metals

124. The melting point in lowest for

Sr

Be

Ca

Mg

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

To protect the anodes

To act as reducing agent

To make a conducting solution of bauxite

To increase Al production

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126. 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 first ionization energy

The stability of +2 oxidation state

Ionic character of the compound

127. In which form boron exist mostly in nature

Oxyborates

Oxides

Sulphides

Nitrides

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

Nitrous oxide

Dinitrogen tetraoxide

Nitric oxide

Nitrogen dioxide

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

Low electronegativity

Low charge density

None

Lower electro positivity

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

Ca and CO₂

CaO

CaCO₃

CaC₂

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

Both a and b

The hydration energy of Na₂SO₄ is more than its lattice energy

The lattice energy of BaSO₄ is more than its hydration energy

The lattice energy has no role to play in solubility

132. The type of hybridization of born in diborane is

Sp²-hybridisation

Sp³d²-hybridisation

Sp³- hybridization

Sp-hybridisation

133. What is more true about alkali metals?

Both oxidizing and reducing agents

Hydrolyzing agents

Reducing agents

Oxidizing agents

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

Chromyl chloride

Chromous chloride

Chromic chloride

None

135. 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 restricts to oxidation state – 1 only

It is more reactive than other halogens

It has highest electronegativity

It has highest first ionization energy

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

Has the largest size

Has the highest heat of vaporization

In the most readily available gas

Has the lowest ionization enthalpy

137. 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

They have high electron affinity and ionization energy

All are non-metals

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

Br₂ > Cl₂ > F₂ > I₂

F₂ > Cl₂ > Br₂ > I₂

I₂ > Br₂ > Cl₂ > F₂

Cl₂ > Br₂ > I₂ > F₂

139. 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.

140. The bleaching action of chlorine is due to

Chlorination

Hydrogenation

Oxidation

Reduction

141. 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

Different resistance under different circumstance

Decease in resistance with intensity of light

Decrease in resistance with increase in temperature

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

Li

Zn

N

He

143. The noble gas forming the maximum number of compounds

Xe

He

Ar

Ne

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

Fe

Al

Na

Mg

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

Decreases down the group

Remains unchanged

Increases down the group

Variation is not regular

146. What causes nitrogen to be chemically inert?

Absence of bond polarity

High bond energy

Multiple bond formation in the molecule

Short internuclear distance

147. Oxygen shows oxidation states

+2, +4, +6

+2, -2

-2, +2, +6

-2

148. Deliquescence is a process in which a solid

Absorbs moisture and turn into liquid

Absorbs moisture and remain solid

Increases the water of crystallization

Loses water of crystallization

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

Ne

F

B

Li

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

Al > Mg > Na > Si

Si > Mg > Al > Na

Mg > Na > Al > Si

Na > Mg > Al > Si

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151. Which of the following is most volatile?

HF

HCl

HI

HBr

152. 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

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

Fluorine

Chlorine

Bromine

Iodine

154. Which noble gas is used in labors?

Argon

Krypton

Neon

Helium

155. Which is the most volatile compound?

HCl

HF

HI

HBr

156. The name of CaSO₄. ½ H₂O is

Dolomite

Epsom salt

Plaster of Paris

Gypsum

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

Kl has high m.p.

CaO has high m.p.

Lattice energy of CaO is much higher than that of Kl

Kl is soluble in benzene

158. 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

159. Which of the following is an inert gas?

H₂

O₂

Argon

N₂

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

Chloride ion

Nitride ion

Sodium ion

Fluoride ion

161. Which of the following is acidic?

N₂O

HgO

BeO

SO₃

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

Chlorophyll

ATP

Florigen

Haemoglobin

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

10

18

54

2

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

Ar

Xe

Kr

Rn

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

Dipole-dipole forces

None of these

H. bonding

Strongest vanderwaal’s force

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

Alumina

Magnesia

Iron oxide

Silica

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

8

32

10

18

168. Mark the nitrate which decomposes differently on heating

NaNO₃

KNO₃

RbNO₃

LiNO₃

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

It is a gas at room temperature

It forms RX₂

It forms R₂O₃

It has oxidation state of +4

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

Energy dissociation

Hydration energy

Electron affinity

High atomic number

171. Indicate the correct statement

Alkali metal atom has the smallest size in its period

Alkali metals have ns’ configuring in outermost shells

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

Alkali metals do not reacts with metals

172. All the elements of oxygen family are

Radioactive

Metalloids

Polymorphic

Non-metals

173. Alkali metals are generally extracted by

Displacement methods

Electrolytic methods

Reduction methods

Double decomposition methods

174. Freon-12 is used as a

Fungicide

Refrigerant

Herbicide

Insecticide

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

Borazole is nonpolar compound

Borazole is electron deficient compound

Of localized electrons in it

Borazole is polar compound

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

Aluminum and silicon

Gallium and Germanium

Iron and sulphur

Proton and silicon

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

H₂S

HCl

SO₂

HBR

178. The noble gas He was discovered by

Frank land and Lockyer

Chadwick

Dorn

Rutherford

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

It has highest first I.E

It is more reactive than other halogens

It has highest E.N

It restricts to oxidation state – 1 only

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

Ionic radius

First ionization energy

Melting point

Electro negativity

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

Cl¯

K⁺

Ca²⁺

S²¯

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

NaCl

NaF

NaBr

Nal

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

Krypton

Helium

Neon

Argon

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

XeF₂

XeF₆

XeF₄

XeF₃

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

High covalent nature

High ∆H lattice

Low ∆H lattice

Small ionic size of Li⁺

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

1, 12, 30, 4, 62

37, 19, 3, 55

12, 20, 56, 88

9, 17, 35, 53

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

Mixture of helium and oxygen

Mixture of argon and oxygen

Mixture of neon and oxygen

Mixture of xenon and nitrogen

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

Ar

O₂

H₂

He

189. P₂O₅ is heated with water to give

Hypo phosphorous acid

Phosphorous acid

Hypo phosphoric acid

Orthophosphoric acid

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

Calcium carbonate

Sodium carbonate

Sodium bicarbonate

Calcium oxide

191. Sulphuric acid has great affinity for water because

Acid forms hydrates with water

It decomposes the acid

Acid decomposes water

It hydrolyses the acid

192. Which halogen have most corrosive action on skin?

F₂

Chlorine

I₂

Br₂

193. 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

194. 6NaOH + Cl₂ → 5Nacl + Naclo₃ in this reaction chlorine is

Oxidized

Both oxidized and reduced

No change

Reduced

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

O

Si

P

As

196. Which shows maximum catenation property?

S

Te

Se

O

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

Density

Ionization energy

Boiling point

Atomic radius

198. Mark the compound which does not exist

PF₅

NCl₅

SbCl₅

AsF₅

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

Their ionization potential is less than that of other elements

They contain only one electron in their outermost shell

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

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

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

CuSO₄

NaCl

KCl

BaSO₄

Page 9 of 14

201. Which of the halogen has highest electronegativity?

Iodine

Bromine

Fluorine

Chlorine

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

B

D

C

A

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

Hydration of Li⁺ ion

Small size of lithium atom and Li⁺ ion

Greater hardness of Li

Extremely high electropositivity of Li

204. Which halogen is most electropositive?

F

Cl

I

Br

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

None of these

Moisture

Sun light

Dry air

206. Electropositive character increase down the group due to

All of these

Decrease in electronegativity of the elements

Increase in atomic size of elements

Decrease in I.P

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

Lattice energy solids

Entropy of solution formation

Hydration energies of cations

Inter – ionic attraction

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

Calcium sulphates

Magnesium sulphates

Ferrous ammonium sulphate

Magnesium ammonium phosphate

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

Insoluble in water

Variable trend

Highly soluble in water

Less soluble in water

210. Which gives green colour in fireworks?

Barium

Calcium

Potassium

Sodium

211. All halogen are

Drying agents

Oxidizing as well as reducing agents

Oxidizing agents

Reducing agents

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

17.72 g

35.45 g

88.60 g

70.90 g

213. Pyrex glass is a mixture of

Sodium borosilicate and aluminum borosilicate

Sodium silicate and aluminum borosilicate

Sodium silicate and lead silicate

Sodium silicate and calcium silicate

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

20

10

30

40

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

Greater hardness

Smaller ionic radii

Highest boiling points

Lower ionization energies

216. 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

Of the oxidation of H₂S gas by some acid radicals

III group radicals are precipitated as hydroxides

IV group radicals are precipitated as sulphides

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

Paramagnetic

Ferromagnetic

Diamagnetic

Antiferromagnetic

218. 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

Converting sand into silici acid

Hydrating sand and gravel mixed with cement

219. 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

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

HBr

HF

HU

HI

221. Mark the element which shows greatness inert pair effect

Iodine

Bromine

Fluorine

Chlorine

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

HE is used in producing very low temperatures

Ar is used in electric bulbs

Half-life of Rn is only 3-8 days

Ne is obtained during radioactive disintegration

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

Cs

Ba

Cu

Cr

224. Fluorine differs from other halogens due to

Small size

All

High dissociation energy

Low first ionization energy

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

Manganese dioxide

Lead nitrate

Potassium chlorate

Mercuric oxide

Page 10 of 14

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

Noble gases have o heat of vapourization

None of these

It decreases gradually down the group

It increases gradually down the group

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

Sodium nitride

Sodium amide

Sodium hydride

Sodium azide

228. Which one of these is most reactive?

Mg

K

Pb

Na

229. 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

230. The shape of gaseous SnCl₂ is

Linear

t-shaped

Tetrahedral

Angular

231. The one which does not show variable valency is

Titanium

Lead

Copper

Barium

232. Halogens exist in the form of

Various forms

Monoatomic molecules

Cannot be predicted

Diatomic molecules

233. Electron affinity depends on

Atomic number

Atomic size and nuclear charge both

Nuclear charge

Atomic size

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

Al₂(OH)₄

Na₂Al(OH)₄

NaAlO₂

Na₃AlO₃

235. Which one of them is monoatomic?

Oxygen

Fluorine

Nitrogen

Neon

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

Oxygen

Helium

Nitrogen

Neon

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

Br > Cl > F

F > Cl > Br

Cl > F > Br

F > Br > Cl

238. Which statement is correct about halogens?

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

They are all diatomic and form divalent ions

They are all diatomic and form univalent ions

They are all capable of exhibiting several oxidation states

239. The halogen which has only one oxidation state is

Cl

F

Br

I

240. Which one boric acid is stable one?

H₃BO₃

None of these

H₂B₄O₇

HBO₃

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

Free ions

Free electrons

Free molecules

Atoms of sodium and chlorine

242. Plaster of Paris is used

As a drying agent

In metallurgical process

As a plaster for walls

In dentistry and surgery

243. Which of the following is true for magnesium?

It is manufactured by electrolysis of aqueous magnesium chloride

It is more electropositive than sodium

It is a strong reducing agent

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

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

Cl₂

Br₂

F₂

I₂

245. Strongest reducing agent is

Hl

HF

HCl

HBr

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

I₂

Br₂

F₂

Cl₂

247. Bromine is obtained on a commercial scale from

Common salt

Cryolite

Carnallite

Caliche

248. Which one has least dissociation energy?

HI

HCL

HBr

HF

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

B > N > C > O

O > C > B > N

O > C > N > B

O > B > C > N

250. Number of elements present in 5th period is

18

8

32

24

Page 11 of 14

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

Boron

Oxygen

Nitrogen

Carbon

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

Ar

Ne

He

Rn

253. The important ore of lead is

Galena

Haematite

Bauxite

Chalcopyrites

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

Neon

Radon

Helium

Argon

255. Which one is hygroscopic in nature?

HNO3

HBr

HUO4

HCL

256. Which one is the biggest ion?

Ba²⁺

Na⁺

Mg²⁺

Al³⁺

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

14

16

12

7

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

O²¯

B³⁺

Li⁺

F¯

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

Na₃PO₄

Phosphorus pentoxidse

Active charcoal

Anhydrous calcium chloride

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

Mass number

Atomic mass

Isotopic number

Atomic number

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

Br > Cl

C > N

P > Si

Sr > Ca

262. Aluminum (III) chloride forms a dimer because

Higher co-ordination can be achieved by Al

Al has high ionization energy

Al belongs to third group

It cannot form a trimer

263. Which gas can support combustion?

N₂

CO

N₂O

CO₂

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

Cl

F

Br

I

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

Francium

Polonium

Astatine

Radium

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

Strontium

Beryllium

Barium

Calcium

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

Hydration energies of cations

Entropy of solution formation

Lattice energies if solids

Inter ionic attraction

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

Nitrogen is highly soluble in water

Nitrogen is much less soluble in blood than helium

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

Helium is much less soluble in blood than nitrogen

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

Li⁺

H

He⁺

Na

270. Among the halogens the rare element is

Fluorine

Astatine

Chlorine

Iodine

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

Preventing overdeveloping and fogging

Reducing solubility of AgBr

Converting silver halides to metallic silver

Dissolving out unreacted silver bromide

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

Nuclear masses

Nuclear neutron-proton number rations

Atomic masses

Atomic numbers

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

2,8,2

2,8,18,2

2,8

2,8,7

274. Orthophosphoric acid is

Tetrabasic

Dibasic

Tribasic

Monobasic

275. The structure of XeF₆

Tetrahedral

Distorted octahedral

Pyramidal

None of these

Page 12 of 14

276. Which halogen has application in medicines mostly?

Br2

None

I₂

Cl₂

277. Mark the incorrect statement about ‘Li’

‘Li’ combine with nitrogen directly to form Lithium nitride

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

‘Li’ is not effected by air

‘Li’ has a great tendency to form hydrates

278. Hydrochloric acid at 25°C is

Covalent and liquid

None of these

Ionic and gas

Ionic and liquid

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

N

Li

P

C

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

Fluorine

Chlorine

Iodine

Bromine

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

Lattice energy

Ionization energy

Electron affinity

Hydration energy

282. Electron affinity of sulphur is

More than O but less than Se

More than O and Se

Less than O but more than SE

Equal to O and Se

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

Magnesium only

Potassium and magnesium

Magnesium and chlorine

Potassium only

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

Density

Boiling point

Ionization energy

Atomic radius

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

H₂

H₂O

Cl₂

O₂

286. Which one has highest electron affinity?

Cl

I

F

Br

287. 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

288. Cassiterite is an ore of

Ni

Sn

Sb

Mn

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

400

1000

250

200

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

Si

C

Be

Al

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

Noble gases

Heavy metals

Halogens

Light metals

292. 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-1, b-4, c-2, d-3

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

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

293. Nitrolim is

CaCN₂ + C

Ca(CN)₂ + C

All

CaC₂ + C

294. 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 have different densities

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

Three layers are maintained at different temperatures

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

11%

33%

44%

22%

296. Mark the smallest atom

Br

F

Cl

I

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

Chlorine

Ki

Iodine solution

NaCl

298. Calico printing means

Leather printing

Glass printing

Paper printing

Cloth printing

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

Linear acidic

Angular, disc

Tetrahedral, acidic

Linear, basic

300. Which one is the weakest oxyacid of chlorine?

HCIO₄

HCIO₃

HCIO₂

HCIO

Page 13 of 14

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

Rb

Ba

K

Li

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

Po

Se

Te

None of these

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

It oxidizes lead sulphides

It oxidizes potassium iodide

It cannot act as a bleaching agent

It oxidizes mercury

304. Which is the strongest acid

HCL

Cannot be predicted

HCLO4

HNO3

305. Heavy water is obtained by

Simple distillation of water

Prolonged electrolysis of water

Removing impurities of calcium and magnesium form water

Dissolving heavy salt in water

306. Which of the following is most electronegative?

Sn

C

Si

Pb

307. 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

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

Gaseous nature

High polarisability

Inertness

Weak van der Waals forces between atoms

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

p-orbitals

s-orbitals

d-orbitals

None

310. The element that does not form a monoxide is

Tin

Lead

Silicon

Germanium

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

Oxygen

Calcium oxide

Chlorine

Hypochlorous acid

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

Na, Cl

Ca, Cl

Na, Ca

Cl, Br

313. NaOH is prepared by the method

Down’s cell

Solvay process

Castner Kellner cell

Castner cell

314. Crystalline form of sulphur stale at room temperature is

Prismatic sulphur

Plastic sulphur

Rhombic sulphur

Monoclinic sulphur

315. 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

316. The correct formula of Plaster of Paris is

CaSO₄. 3H₂O

CaSO₄

CaSO₄.2H₂O

CaSO₄. 1/2H₂O

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

With inert gases

With alkali metals

None of these

With halogens

318. The most abundant inert gas in the atmosphere is

Ar

He

Kr

Ne

319. The following has zero valency

Kr

Al

Be

Na

320. Which is the strongest acid?

HClO₂

HClO₃

HClO₄

HClO

321. Which of the following is most electronegative?

Lead

Carbon

Silicon

Tin

322. NaoH is named as caustic soda because

It reacts with fats to form soap

It reacts with chlorine gas

It is used in soda water

It corrodes the organic tissues

323. The halogen having highest electron affinity is

Iodine

Fluorine

Chlorine

Bromine

324. Which of the following has highest dipole moment?

NH₃

AsH₃

SbH₃

PH₃

325. 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 decrease in the nuclear charge of the alkaline earth metals

None of these

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

Page 14 of 14

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

SF₄

XeF₄

HeF₄

CF₄

327. The acid which has a peroxy linkage is

Carlo’s acid

Dithionic acid

Pyrosulphuric acid

Sulphurous acid

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

Of easy extraction of Al from it

Bauxite is less impure

Bauxite is available in large quantity

Bauxite contains maximum of Al

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

BaSO₄

MnS

BaCO₃

ZnS

330. 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

Weak acid and weak base

Strong acid and strong base

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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