ECAT Chemistry The Halogens and Noble Gases Chapter Test Online

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Chemistry

1. Which of the following oxides is peroxide?

Mn₂O

SO₂

Na₂O₂

BaO

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

Low melting point

Their ions are isoelectronic with noble gases

High ionization energy

Low electronegativity

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

O₂ and He

O₂ and Ar

O₂ and CO₂

CO₂ and Ar

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

Insoluble in water

Variable trend

Highly soluble in water

Less soluble in water

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

Ra

Lr

Rn

Fr

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

Iodine solution

Ki

NaCl

Chlorine

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

HCl

H₂S

HBR

SO₂

8. Which of the following is an inert gas?

H₂

O₂

N₂

Argon

9. The one which does not show variable valency is

Copper

Barium

Titanium

Lead

10. Which halogen has application in medicines mostly?

I₂

None

Cl₂

Br2

11. Mark the correct statement

Li₂CO₃ is soluble in water

Carbonates of Ca, Ba, Sr are soluble in water

Carbonates of Na, K, NH₄ are soluble in water

Basic carbonates of Mg and Cu are soluble in water

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

Magnesia

Iron oxide

Alumina

Silica

13. Hydrochloric acid at 25°C is

Covalent and liquid

Ionic and gas

Ionic and liquid

None of these

14. The bleaching action of chlorine is due to

Oxidation

Reduction

Hydrogenation

Chlorination

15. 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 absorbs moisture

It changes into calcium chloride and calcium chlorate

16. Which of the following has highest dipole moment?

NH₃

SbH₃

AsH₃

PH₃

17. Mark the smallest atom

I

Br

Cl

F

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

Iodine

Bromine

Chlorine

Fluorine

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

Solvated electrons

Sodium hydride

Sodium amide

Sodium atoms

20. 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

200mL

Zero

800 mL

10mL

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

Fluorine cannot be prepared by electrolysis of fused metal fluorides

Electron affinity of chlorine is greater than that of fluorine

Fluorine does not form oxoacid

Bond energy of fluorine is less than that of chlorine

22. Which is the strongest acid?

HClO₃

HClO₄

HClO

HClO₂

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

O₂+

None of these

O₂

O₂-

24. Sea weeds are important source of

Bromine

Iodine

Chlorine

Iron

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

All the halogens react with noble gases to form their halides

All are non-metals

They have high electron affinity and ionization energy

All the halogens have electronic configuration ns2P5

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

Nitrogen is highly soluble in water

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

Helium is much less soluble in blood than nitrogen

Nitrogen is much less soluble in blood than helium

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

Chromous chloride

Chromic chloride

Chromyl chloride

None

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

C

P

N

Li

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

Small size of fluorine

Non-metallic nature of fluorine

More electro negativity of fluorine

More electron repulsion in fluorine

30. The type of hybridization of born in diborane is

Sp-hybridisation

Sp³d²-hybridisation

Sp²-hybridisation

Sp³- hybridization

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

Mixture of helium and oxygen

Mixture of xenon and nitrogen

Mixture of neon and oxygen

Mixture of argon and oxygen

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

O³¯

O₂¯²

K⁺

OH¯

33. Which shows maximum catenation property?

Se

O

Te

S

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

Presence of NH₃

Reaction with brine solution

Reaction with NaOH

Reaction with CO₂

35. Mark the correct statement

None of these

Iodine is a solid

Cl₂ is more insoluble in water

Br is more reactive than Cl₂

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

Kr

Xe

Ar

Rn

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

Diclacium silicate

Tri-calcium silicate

Tri-calcium aluminate

Tetra calcium aluminoferrite

38. Which of the following is correct?

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

Sodium reduces CO₂ to carbon

Magnesium reacts with cold water and liberates hydrogen

Magnallium is one alloy of Mg and zinc

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

Density

Ionization energy

Boiling point

Atomic radius

40. Which halogen is most electropositive?

F

Br

I

Cl

41. 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 nitrate

A carbonate

A sulphate

A bromide

42. Which one has highest electron affinity?

Cl

I

F

Br

43. 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

44. NaoH is named as caustic soda because

It corrodes the organic tissues

It reacts with fats to form soap

It is used in soda water

It reacts with chlorine gas

45. The noble gases are

Monoatomic

Diatomic

All of these

Polyatomic

46. Which one is the weakest oxyacid of chlorine?

HCIO₄

HCIO

HCIO₂

HCIO₃

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

Lattice energy

Hydration energy

Ionization energy

Electron affinity

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

Rn

Ar

He

Ne

49. A clathrate may be defined as a

Liquid crystal

Mixture

Solid solution

Cage compound

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

Pb

Po

Fe

Te

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

It is used furniture polish

It is used as fire proof in textile

It is as filter for soap

It is used in the formation white cement

52. Fluorine differs from other halogens due to

High dissociation energy

Low first ionization energy

All

Small size

53. Boron compounds behave as Lewis acid because of their

Acidic nature

Electron deficiency

Ionization property

Covalent nature

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

I

F

Cl

Br

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

Kl has high m.p.

Lattice energy of CaO is much higher than that of Kl

CaO has high m.p.

Kl is soluble in benzene

56. Electron affinity of sulphur is

More than O and Se

Less than O but more than SE

Equal to O and Se

More than O but less than Se

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

I₂

F₂

Br₂

Cl₂

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

54

18

10

2

59. The name of CaSO₄. ½ H₂O is

Epsom salt

Dolomite

Plaster of Paris

Gypsum

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

In sea

As salts in ponds

In the atmosphere

In lakes

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

Iodine

Chlorine

Fluorine

Bromine

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

Greater hardness of Li

Small size of lithium atom and Li⁺ ion

Extremely high electropositivity of Li

Hydration of Li⁺ ion

63. SO3 is not dissolve directly in H2O because

SO₃ is insoluble in H₂O

The reaction is quite slow

The reaction is highly exothermic

The reaction does not go to completion

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

p-orbitals

s-orbitals

None

d-orbitals

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

F

Br

Cl

I

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

Calcium

Barium

Beryllium

Strontium

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

B > N > C > O

O > B > C > N

O > C > N > B

O > C > B > N

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

Borazole is nonpolar compound

Of localized electrons in it

Borazole is polar compound

Borazole is electron deficient compound

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

CaC₂

CaO

CaCO₃

Ca and CO₂

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

Ionic

Covalent

Coordinate

Metallic

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

Nitrogen trichloride

Hyponitrous acid

Nitrosyl chloride

Phosphorus trichloride

72. 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

Ionic character of the compound

The stability of +2 oxidation state

The first ionization energy

73. Electron affinity depends on

Atomic size and nuclear charge both

Atomic number

Atomic size

Nuclear charge

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

Fe

S

Pb

Si

75. Sulphuric acid has great affinity for water because

It decomposes the acid

Acid decomposes water

Acid forms hydrates with water

It hydrolyses the acid

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76. 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

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

Radium

Polonium

Francium

Astatine

78. XeF₄ involves which hybridization

Sp²

Sp²d

Sp

Sp³d²

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

1½

½

5/2

2

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

Tl

Si

Al

F

81. 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

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

Dissolving out unreacted silver bromide

Reducing solubility of AgBr

Converting silver halides to metallic silver

Preventing overdeveloping and fogging

83. Oxygen shows oxidation states

-2

+2, +4, +6

-2, +2, +6

+2, -2

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

A

D

C

B

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

MO₂

M₂O₃

MO

M₂O

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

F

I

Cl

Br

87. The structure of XeF₆

None of these

Tetrahedral

Distorted octahedral

Pyramidal

88. 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

89. Alkali metals are generally extracted by

Double decomposition methods

Electrolytic methods

Displacement methods

Reduction methods

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

Mg > Na > Al > Si

Na > Mg > Al > Si

Si > Mg > Al > Na

Al > Mg > Na > Si

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

11%

22%

33%

44%

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

O

As

P

Si

93. 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

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

Some nitrogen molecules analogous to O₂

CO₂

Argon

Greater amount of nitrogen molecules derived from N¹⁵ isotope

95. Bromine is obtained on a commercial scale from

Caliche

Cryolite

Carnallite

Common salt

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

Aluminum and silicon

Iron and sulphur

Proton and silicon

Gallium and Germanium

97. Alkaline earth metals comes under

Representative elements

Transition elements

Halogens

Inner transition elements

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

Cr

Cs

Cu

Ba

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

O₂

H₂

He

Ar

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

Haber

Chamber

Solvay

Castner

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

18

8

32

10

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

Sulphur dioxide

Chlorine

Carbon dioxide

Iodide

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

Hypochlorous acid

Oxygen

Calcium oxide

Chlorine

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

Ca²⁺

K⁺

S²¯

Cl¯

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

Bromine

Fluorine

Iodine

Chlorine

106. NaOH is prepared by the method

Castner Kellner cell

Solvay process

Castner cell

Down’s cell

107. The most abundant inert gas in the atmosphere is

Kr

Ne

He

Ar

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

Calcium carbonate

Sodium bicarbonate

Calcium oxide

Sodium carbonate

109. HNO₂ acts as an/a

All the three

Reducing agent

Oxidizing agent

Acid

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

Melting point

Ionic radius

Electro negativity

First ionization energy

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

It has oxidation state of +4

It forms RX₂

It is a gas at room temperature

It forms R₂O₃

112. Which one of them is monoatomic?

Nitrogen

Neon

Fluorine

Oxygen

113. Number of elements present in 5th period is

18

32

24

8

114. Which of the following is not isoelectronic?

O²¯

Na⁺

Cl¯

Mg²⁺

115. Aluminum (III) chloride forms a dimer because

Higher co-ordination can be achieved by Al

Al belongs to third group

It cannot form a trimer

Al has high ionization energy

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

Large atomic size

Strongly bond valence electrons

Small ionic size

Metallic properties

117. Nitrolim is

CaC₂ + C

CaCN₂ + C

All

Ca(CN)₂ + C

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

Leads to the dissolution of beryllium metal

Have no effect

Precipitate Mg

Precipitate Mg metal

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

Low electronegativity

None

Low charge density

Lower electro positivity

120. 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

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

None of these

Po

Se

Te

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

Li

N

Zn

He

123. The metal used for making radiation shield is

Fe

Zn

Al

Pb

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

Sodium hydride

Sodium amide

Solvated electrons

Sodium atoms

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

Boiling point

Atomic radius

Ionization energy

Density

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126. Pyrex glass is a mixture of

Sodium silicate and calcium silicate

Sodium silicate and aluminum borosilicate

Sodium silicate and lead silicate

Sodium borosilicate and aluminum borosilicate

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

He⁺

Li⁺

H

Na

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

Lose 3 electrons

Gain 2 electrons

Lose 2 electrons

Gain 3 electrons

129. Which of the following is most volatile?

HF

HBr

HCl

HI

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

Heavy metals

Light metals

Noble gases

Halogens

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

Iron

Aluminum

Copper

Zinc

132. Variable valency is characteristic of

Transition elements

Noble gas

Alkali metals

Halogen

133. What is more true about alkali metals?

Hydrolyzing agents

Oxidizing agents

Reducing agents

Both oxidizing and reducing agents

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

Lattice energy solids

Inter – ionic attraction

Entropy of solution formation

Hydration energies of cations

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

Magnesium

Phosphorus

Copper

Mercury

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

Tetrahedral, acidic

Linear, basic

Angular, disc

Linear acidic

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

Hypo phosphorous acid

Pyro phosphoric acid

Metaphosphoric acid

Orthophosphoric acid

138. White enamel of our teeth is

CaBr₂

Ca₃(PO₄)₂

CaCl₂

CaF₂

139. The halogen having highest electron affinity is

Bromine

Chlorine

Fluorine

Iodine

140. Identify the correct statement

Elemental Na is easily oxidized

Elemental Na is a strong oxidizing agent

Elemental Na is insoluble in NH₃

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

141. Which gives green colour in fireworks?

Potassium

Sodium

Calcium

Barium

142. Bond angle is minimum for

H₂O

H₂Te

H₂Se

H₂S

143. Which halogen have most corrosive action on skin?

Chlorine

Br₂

F₂

I₂

144. Hypo is used in photography for

Developing picture

Picture printed

The colour of picture

The fixation of picture

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

Free ions

Atoms of sodium and chlorine

Free molecules

Free electrons

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

F

Ne

B

Li

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

ZnS

BaSO₄

MnS

BaCO₃

148. Which of the following phosphorus is most reactive?

Red phosphorus

Violet phosphorus

Scarlet phosphorus

White phosphorus

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

Dipole-dipole forces

H. bonding

Strongest vanderwaal’s force

None of these

150. The melting point in lowest for

Ca

Be

Sr

Mg

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

XeF₃

XeF₂

XeF₆

XeF₄

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

Cl₂ > Br₂ > I₂ > F₂

F₂ > Cl₂ > Br₂ > I₂

Br₂ > Cl₂ > F₂ > I₂

I₂ > Br₂ > Cl₂ > F₂

153. Which statement is correct?

None of these

Noble gases will all burn in pure oxygen

Noble gases are all dense gases

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

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

Hydration energy of ion

High atomic number

Electron affinity

Energy dissociation

155. The substance not likely to contain CaCO₃ is

Dolomite

Calcried gypsum

A marble states

Sea shells

156. The halogen that is most easily reduced is

Cl₂

I₂

F₂

Br₂

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

Dry air

Moisture

None of these

Sun light

158. Which gas can support combustion?

CO₂

CO

N₂

N₂O

159. In which form boron exist mostly in nature

Oxides

Nitrides

Sulphides

Oxyborates

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

Mg

Li

Rb

Cl

161. Which of the following is most electronegative?

Carbon

Tin

Lead

Silicon

162. The colour of I₂ in CCI₄ is

Colourless

Violet

Bluish green

Radish brown

163. The alkali metals

Form salt like hydrides

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

Show increasing electro negativity from Li to Cs.

Form salts which are predominantly covalent

164. Which is the strongest acid

Cannot be predicted

HCL

HNO3

HCLO4

165. Mark the incorrect statement about ‘Li’

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

‘Li’ has a great tendency to form hydrates

‘Li’ is not effected by air

‘Li’ combine with nitrogen directly to form Lithium nitride

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

Magnesium and chlorine

Magnesium only

Potassium and magnesium

Potassium only

167. Which one halogen is radioactive?

Chlorine

Bromine

Iodine

Astatine

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

CuSO₄

NaCl

BaSO₄

KCl

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

Prevent puncturing by under sea rock

To prevent the action of water and salt

Mark the ship lighter

Keep away the sharks

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

Alkali metals

Halogens

Oxygen family

Nitrogen family

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

Nitride ion

Chloride ion

Fluoride ion

Sodium ion

172. Which one of these is most reactive?

K

Na

Pb

Mg

173. Cassiterite is an ore of

Sn

Sb

Ni

Mn

174. The following has zero valency

Be

Al

Kr

Na

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

H₂

Na

Cl₂

O₂

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176. Identify the correct statement

Plaster of Paris is obtained by partial oxidation of gypsum

Gypsum is obtained by heating plaster of pairs

Gypsum contains a lower percentage of calcium than plaster of pairs

Plaster of Pairs can be obtained by partial oxidation of gypsum

177. 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

178. Neon glows in discharge tube as

Greenish

Radish

Bluish

Yellowish

179. Freon-12 is used as a

Fungicide

Refrigerant

Herbicide

Insecticide

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

Helium

Argon

Neon

Radon

181. Which one is the biggest ion?

Mg²⁺

Ba²⁺

Al³⁺

Na⁺

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

2,8,7

2,8

2,8,2

2,8,18,2

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

Rb

Ba

K

Li

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

Oxygen

Neon

Helium

Nitrogen

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

N/P ratio

Ionization energy

Electro negativity

Atomic radius

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

Sodiums sulphates

Sodium sulphides

Sodium thiosulphate

Sodium persulphate

187. Mark the nitrate which decomposes differently on heating

LiNO₃

RbNO₃

KNO₃

NaNO₃

188. Which noble gas is used in labors?

Neon

Helium

Krypton

Argon

189. The noble gas forming the maximum number of compounds

Ar

He

Ne

Xe

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

Br > Cl > F

Cl > F > Br

F > Cl > Br

F > Br > Cl

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

HCl

HBr

HI

HF

192. 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 have different densities

There is special arrangement is cell to keep the layers separate

Three layers are maintained at different temperatures

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

193. Among noble gases xenon gives compounds due to

Zero electron affinity

Higher I-P

Large size

Structure

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

Astatine

Polonium

Radium

Francium

195. Which of the following has greatest reducing power?

HI

HCl

HI

HBr

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

Atomic number

Isotopic number

Atomic mass

Mass number

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

H₂

H₂O

O₂

Cl₂

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

Low ∆H lattice

High ∆H lattice

High covalent nature

Small ionic size of Li⁺

199. Sulphuric acid reacts with PCl₅ to give

Sulphur tetrachloride

Thionyl chloride

Sulphuryl chloride

Sulphur monochloride

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

Active charcoal

Phosphorus pentoxidse

Anhydrous calcium chloride

Na₃PO₄

Page 9 of 14

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

200

400

250

1000

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

14

16

12

7

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

Smaller ionic radii

Highest boiling points

Lower ionization energies

Greater hardness

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

K

Rb

Na

Cs

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

Ar

Ne

He

Xe

206. 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

SnO₂

CO₂

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

30

20

40

10

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

Converting sand into silici acid

Hydrating sand and gravel mixed with cement

Keeping it cool

Developing interlocking needle like crystals of hydrated silicates

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

HBr

HCl

HF

Hl

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

Cobalt

Magnesium

Chromium

Iron

211. 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

212. Calcium is obtained by

Electrolysis of molten anhydrous or fused calcium chloride

Reduction of calcium chloride with carbon

Electrolysis of solution of calcium chloride in water

Roasting lime stone

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

Ca, Cl

Na, Ca

Cl, Br

Na, Cl

214. Which is the most volatile compound?

HBr

HI

HF

HCl

215. Cl₂O₇ is best prepared by passing by

Hydrogen chloride over phosphorus pentoxide

Perchloric acid (CHIO₄) over hot silver oxide

Chlorine gas over hot HgO

Chlorine and oxygen over hot silver chlorate

216. Common oxidation state of boron are

+3

+1

-3

+3,-3

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

With alkali metals

With inert gases

None of these

With halogens

218. Orthophosphoric acid is

Monobasic

Tetrabasic

Tribasic

Dibasic

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

88.60 g

70.90 g

35.45 g

17.72 g

220. Select the weakest acid among the following

HCl

HBr

HI

HF

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

Sodium hydride

Sodium amide

Sodium nitride

Sodium azide

222. The last orbit of argon would have electrons

18

8

2

6

223. Which statement is true about IV A group

There is a regular gradation of properties from top to bottom

Whole group consist of non-metals

Abrupt change of properties

Marked change of properties

224. What causes nitrogen to be chemically inert?

High bond energy

Multiple bond formation in the molecule

Absence of bond polarity

Short internuclear distance

225. Who reported first noble gas?

Ramsay

Cavendish

Frank land

J.J Thomson

Page 10 of 14

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

Br

O

F

U

227. Which one has least dissociation energy?

HBr

HF

HCL

HI

228. 6NaOH + Cl₂ → 5Nacl + Naclo₃ in this reaction chlorine is

Oxidized

Reduced

Both oxidized and reduced

No change

229. 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

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

Additive electrons are accommodated in new electron level

Atomic number increases

Atomic mass increases

Effective nuclear charge increases

231. 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

232. Which of the following statements is incorrect?

Ionic character of alkali metal halides decreases down the group

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

Sodium is the most abundant metallic element in sea water

Melting and boiling points of alkali metals decrease down the group

233. Calico printing means

Cloth printing

Leather printing

Glass printing

Paper printing

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

Br₂

F₂

Cl₂

I₂

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

Oxygen

Carbon

Boron

Nitrogen

236. Which of the following is acidic?

SO₃

BeO

HgO

N₂O

237. An atom with high electro negativity has

Low electron affinity

Low ionization potential

High ionization potential

Large size

238. Vander Waals forces are stronger in

F₂

Cl₂

I₂

Br₂

239. The most powerful oxidizing agent among the halogens is

I₂

F₂

Cl₂

Br₂

240. 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

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

Mg

Ba

Sr

Ca

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

Argon

Helium

Krypton

Neon

243. The most acidic of the following compounds is

As₂O₃

P₂O₃

B₂O₃

Sb₂O₃

244. Which one boric acid is stable one?

HBO₃

None of these

H₃BO₃

H₂B₄O₇

245. Which noble gas is used earth quake prediction?

Ar

Kr

Rn

He

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

NaF

Nal

NaBr

NaCl

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

Inertness

Weak van der Waals forces between atoms

Gaseous nature

High polarisability

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

Strong oxidizing agents

Strong reducing agents

Weak reducing agents

Weak oxidizing agents

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

As an oxidizer in metallurgy

As an abrasive in the form of abundum

For preparing artificial

In form of foil for wrapping

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

Silver

Lead

Sodium

Zinc

Page 11 of 14

251. Heavy water is obtained by

Dissolving heavy salt in water

Simple distillation of water

Prolonged electrolysis of water

Removing impurities of calcium and magnesium form water

252. The element that does not form a monoxide is

Germanium

Lead

Tin

Silicon

253. Strongest reducing agent is

HCl

Hl

HBr

HF

254. All the elements of oxygen family are

Radioactive

Polymorphic

Non-metals

Metalloids

255. Which of the noble gas has highest polarizabilities?

He

Xe

Kr

Ar

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

O²¯

B³⁺

F¯

Li⁺

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

Lead nitrate

Manganese dioxide

Mercuric oxide

Potassium chlorate

258. The important ore of lead is

Galena

Chalcopyrites

Haematite

Bauxite

259. 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

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

High energies of hydration of M²⁺ in solution

High lattice energy of M²⁺ ions in the solid state

Diamagnetic nature

None of these of M²⁺ ions

261. Which of the following is most electronegative?

Pb

C

Sn

Si

262. The noble gas He was discovered by

Frank land and Lockyer

Chadwick

Rutherford

Dorn

263. The noble gases consist of

Triatomic molecules

Diatomic molecules

Single free atoms

Atoms linked by weak bonds

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

Borax

Calomel

Gypsum

Alum

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

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

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

None of these

There is no change in the nuclear charge

266. Mark the compound which does not exist

SbCl₅

PF₅

AsF₅

NCl₅

267. Indicate the correct statement

Alkali metals do not reacts with metals

Alkali metals have ns’ configuring in outermost shells

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

Alkali metal atom has the smallest size in its period

268. The correct formula of Plaster of Paris is

CaSO₄

CaSO₄. 3H₂O

CaSO₄. 1/2H₂O

CaSO₄.2H₂O

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

Nitrous oxide

Dinitrogen tetraoxide

Nitric oxide

Nitrogen dioxide

270. Halogens exist in the form of

Diatomic molecules

Various forms

Cannot be predicted

Monoatomic molecules

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

11

16

10

14

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

Third

Fourth

Fifth

Sixth

273. Mark the element which shows greatness inert pair effect

Fluorine

Iodine

Bromine

Chlorine

274. Which is valence shell configuration of halogens?

nS₂, nP₆

nS₂, nP₃

NS₂, nP₄

ns₂, nP₅

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

Paramagnetic

Antiferromagnetic

Diamagnetic

Ferromagnetic

Page 12 of 14

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

Nuclear masses

Atomic masses

Nuclear neutron-proton number rations

Atomic numbers

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

HeF₄

SF₄

CF₄

XeF₄

278. AlCl₃ flumes in moist air because

HCl is formed in moist air

It is very volatile

It is covalent

It is highly hygroscopic

279. 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 restricts to oxidation state – 1 only

It is more reactive than other halogens

280. Polyanion formation is maximum in

Oxygen

Sulphur

Nitrogen

Boron

281. 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

282. Crystalline form of sulphur stale at room temperature is

Monoclinic sulphur

Rhombic sulphur

Prismatic sulphur

Plastic sulphur

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

It oxidizes mercury

It oxidizes potassium iodide

It oxidizes lead sulphides

It cannot act as a bleaching agent

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

Solvay process of sodium carbonate

Iron from haematite

Ordinary (soda lime) glass

Phosphorus from phosphorite

285. 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

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

NH₃

Al₂O₃

CO₂

CO

287. All halogen are

Oxidizing as well as reducing agents

Oxidizing agents

Drying agents

Reducing agents

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

Iron

Copper

Sodium

Lead

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

Magnesium ammonium phosphate

Calcium sulphates

Magnesium sulphates

Ferrous ammonium sulphate

290. The halogen which has only one oxidation state is

Br

F

Cl

I

291. The percentage of lead in lead pencil is

80

70

Zero

20

292. Which of the halogen has highest electronegativity?

Bromine

Chlorine

Iodine

Fluorine

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

IV group radicals are precipitated as sulphides

III group radicals are precipitated as hydroxides

Of the oxidation of H₂S gas by some acid radicals

Sulphur is present in the mixture as impurity

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

Fe

Al

Mg

Na

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

Sr > Ca

P > Si

C > N

Br > Cl

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

Na₃AlO₃

NaAlO₂

Na₂Al(OH)₄

Al₂(OH)₄

297. The shape of gaseous SnCl₂ is

Angular

Linear

t-shaped

Tetrahedral

298. The acid which has a peroxy linkage is

Sulphurous acid

Dithionic acid

Carlo’s acid

Pyrosulphuric acid

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

HE is used in producing very low temperatures

Half-life of Rn is only 3-8 days

Ne is obtained during radioactive disintegration

Ar is used in electric bulbs

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

The hydration energy of Na₂SO₄ is more than its lattice energy

The lattice energy of BaSO₄ is more than its hydration energy

Both a and b

The lattice energy has no role to play in solubility

Page 13 of 14

301. Which one is hygroscopic in nature?

HCL

HNO3

HBr

HUO4

302. 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-2, b-3, c-1, d-4

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

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

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

H₂O₂

O₂

CO₂

CO

304. XeF₄ on partial hydrolysis produces

XeF₂

XeO₃

XeOF₄

XeOF₂

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

HF molecules form intermolecular H-bonds

Fluorine is highly reactive

Fluorine atom is smaller in size

HF is the weakest acid

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

To increase Al production

To make a conducting solution of bauxite

To protect the anodes

To act as reducing agent

307. Which of the following is true for magnesium?

It is more electropositive than sodium

It is manufactured by electrolysis of aqueous magnesium chloride

It is a strong reducing agent

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

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

Remains unchanged

Increases down the group

Decreases down the group

Variation is not regular

309. The ionization potential is lowest for the

Alkaline earth metals

Halogens

Alkali metals

Inert gases

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

Neon

Radon

Argon

Xenon

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

Br

F

Cl

I

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

HU

HF

HI

HBr

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

Expensive but easy to store in cylinder

Expense, but a very uncreative gas

Less dense then air and not flammable

Lighter than air and cheap to produce

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

Al⁺

Ne

Mg⁺

Li⁺

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

Cl

I

F

Br

316. Among the halogens the rare element is

Fluorine

Chlorine

Iodine

Astatine

317. Permonosulphuric acid is known as

Carlo’s acid

Marshall’s acid

None of these

Sulphuric acid

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

Soda glass

Flint glass

Crooke’s glass

Borosilicate glass

319. I₂ is solid at room temperature because

It is highly electronegative

It possess hydrogen bonding

Its molecule has a large size

It has metallic bond

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

Al

Si

Be

C

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

12, 20, 56, 88

1, 12, 30, 4, 62

9, 17, 35, 53

37, 19, 3, 55

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

ATP

Florigen

Chlorophyll

Haemoglobin

323. P₂O₅ is heated with water to give

Orthophosphoric acid

Phosphorous acid

Hypo phosphoric acid

Hypo phosphorous acid

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

I

S

F

Cl

325. Electropositive character increase down the group due to

Decrease in I.P

Decrease in electronegativity of the elements

Increase in atomic size of elements

All of these

Page 14 of 14

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

Diamond

Coke

Graphite

Coal

327. Plaster of Paris is used

In metallurgical process

As a plaster for walls

In dentistry and surgery

As a drying agent

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

It increases gradually down the group

It decreases gradually down the group

None of these

Noble gases have o heat of vapourization

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

Electron affinity

Energy dissociation

Hydration energy

High atomic number

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

Bromine

Iodine

Fluorine

Chlorine

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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