ECAT Chemistry The Halogens and Noble Gases Chapter Test Online

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Chemistry

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

30

20

40

10

2. Common oxidation state of boron are

+3,-3

+3

-3

+1

3. 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

None of these of M²⁺ ions

Diamagnetic nature

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

Dipole-dipole forces

None of these

Strongest vanderwaal’s force

H. bonding

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

Hypochlorous acid

Oxygen

Chlorine

Calcium oxide

6. Which gas can support combustion?

CO

CO₂

N₂O

N₂

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

Lose 3 electrons

Gain 2 electrons

Gain 3 electrons

Lose 2 electrons

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

It has oxidation state of +4

It is a gas at room temperature

It forms RX₂

It forms R₂O₃

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

Sodium amide

Solvated electrons

Sodium hydride

Sodium atoms

10. White enamel of our teeth is

CaBr₂

Ca₃(PO₄)₂

CaCl₂

CaF₂

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

I₂>F₂>Br₂>U₂

F₂>Cl₂>Br₂>I2

U₂>Br₂>I₂>F₂

I₂>Br₂>U₂>F₂

12. Which one boric acid is stable one?

None of these

H₃BO₃

HBO₃

H₂B₄O₇

13. Calcium is obtained by

Electrolysis of solution of calcium chloride in water

Roasting lime stone

Electrolysis of molten anhydrous or fused calcium chloride

Reduction of calcium chloride with carbon

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

Free molecules

Atoms of sodium and chlorine

Free ions

Free electrons

15. Among the halogens the rare element is

Iodine

Fluorine

Astatine

Chlorine

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

Inertness

Gaseous nature

Weak van der Waals forces between atoms

High polarisability

17. What is more true about alkali metals?

Both oxidizing and reducing agents

Hydrolyzing agents

Reducing agents

Oxidizing agents

18. 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 carbonate

A bromide

A nitrate

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

CO₂

H₂O₂

CO

O₂

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

Silver

Sodium

Zinc

Lead

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

Nitric oxide

Nitrogen dioxide

Dinitrogen tetraoxide

Nitrous oxide

22. Mark the correct statement

Li₂CO₃ is soluble in water

Carbonates of Ca, Ba, Sr are soluble in water

Basic carbonates of Mg and Cu are soluble in water

Carbonates of Na, K, NH₄ are soluble in water

23. The halogen which has only one oxidation state is

F

I

Br

Cl

24. The most acidic of the following compounds is

B₂O₃

P₂O₃

As₂O₃

Sb₂O₃

25. A clathrate may be defined as a

Mixture

Solid solution

Cage compound

Liquid crystal

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

Covalent

Coordinate

Ionic

Metallic

27. Halogens exist in the form of

Cannot be predicted

Diatomic molecules

Various forms

Monoatomic molecules

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

Sulphur is present in the mixture as impurity

IV group radicals are precipitated as sulphides

Of the oxidation of H₂S gas by some acid radicals

III group radicals are precipitated as hydroxides

29. Which of the following statements is incorrect?

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

Sodium is the most abundant metallic element in sea water

Ionic character of alkali metal halides decreases down the group

Melting and boiling points of alkali metals decrease down the group

30. Mark the correct statement

Br is more reactive than Cl₂

Iodine is a solid

None of these

Cl₂ is more insoluble in water

31. P₂O₅ is heated with water to give

Hypo phosphorous acid

Phosphorous acid

Orthophosphoric acid

Hypo phosphoric acid

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

Cl

S

F

I

33. Electron affinity depends on

Atomic number

Atomic size and nuclear charge both

Atomic size

Nuclear charge

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

Borax

Alum

Gypsum

Calomel

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

Al

Tl

Si

F

36. Which halogen is most electropositive?

Br

I

Cl

F

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

Mercury

Phosphorus

Copper

Magnesium

38. The acid which has a peroxy linkage is

Sulphurous acid

Carlo’s acid

Dithionic acid

Pyrosulphuric acid

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

Iodine

Fluorine

Bromine

Chlorine

40. Which of the following is correct?

Magnallium is one alloy of Mg and zinc

Magnesium reacts with cold water and liberates hydrogen

Sodium reduces CO₂ to carbon

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

41. Nitrolim is

Ca(CN)₂ + C

CaCN₂ + C

All

CaC₂ + C

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

Noble gases

Halogens

Heavy metals

Light metals

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

Graphite

Coke

Diamond

Coal

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

HF

HCl

HBr

Hl

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

HF

HI

HU

HBr

46. AlCl₃ flumes in moist air because

It is covalent

It is highly hygroscopic

HCl is formed in moist air

It is very volatile

47. The type of hybridization of born in diborane is

Sp-hybridisation

Sp²-hybridisation

Sp³- hybridization

Sp³d²-hybridisation

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

It cannot act as a bleaching agent

It oxidizes potassium iodide

It oxidizes mercury

It oxidizes lead sulphides

49. Polyanion formation is maximum in

Oxygen

Nitrogen

Boron

Sulphur

50. The noble gases consist of

Diatomic molecules

Single free atoms

Triatomic molecules

Atoms linked by weak bonds

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51. Which of the following has greatest reducing power?

HI

HBr

HCl

HI

52. Which one of them is monoatomic?

Neon

Fluorine

Oxygen

Nitrogen

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

O₂¯²

K⁺

O³¯

OH¯

54. Number of elements present in 5th period is

24

18

8

32

55. The structure of XeF₆

Tetrahedral

Pyramidal

Distorted octahedral

None of these

56. 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

They contain only one electron in their outermost shell

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

Their ionization potential is less than that of other elements

57. Electropositive character increase down the group due to

All of these

Increase in atomic size of elements

Decrease in electronegativity of the elements

Decrease in I.P

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

U

F

O

Br

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

Po

Te

Pb

Fe

60. Which of the following phosphorus is most reactive?

Violet phosphorus

Red phosphorus

White phosphorus

Scarlet phosphorus

61. Plaster of Paris is used

As a plaster for walls

In metallurgical process

As a drying agent

In dentistry and surgery

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

P

C

Li

N

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

Nitrogen is much less soluble in blood than helium

Nitrogen is highly soluble in water

Helium is much less soluble in blood than nitrogen

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

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

Neon

Nitrogen

Oxygen

Helium

65. The percentage of lead in lead pencil is

80

20

Zero

70

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

Iron

Copper

Aluminum

Zinc

67. Heavy water is obtained by

Removing impurities of calcium and magnesium form water

Prolonged electrolysis of water

Dissolving heavy salt in water

Simple distillation of water

68. Identify the incorrect statement with respect to ozone.

Ozone is more reactive than dioxygen

Ozone is diamagnetic whereas dioxygen is paramagnetic

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

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

69. Sulphuric acid reacts with PCl₅ to give

Sulphur monochloride

Sulphur tetrachloride

Thionyl chloride

Sulphuryl chloride

70. Which halogen has application in medicines mostly?

I₂

Cl₂

Br2

None

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

Ne

Rn

Ar

He

72. The correct formula of Plaster of Paris is

CaSO₄.2H₂O

CaSO₄. 3H₂O

CaSO₄

CaSO₄. 1/2H₂O

73. The most abundant inert gas in the atmosphere is

Ar

Ne

Kr

He

74. Mark the compound which does not exist

NCl₅

AsF₅

PF₅

SbCl₅

75. Oxygen shows oxidation states

-2, +2, +6

+2, +4, +6

-2

+2, -2

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76. NaoH is named as caustic soda because

It corrodes the organic tissues

It reacts with fats to form soap

It reacts with chlorine gas

It is used in soda water

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

H₂

H₂O

Cl₂

O₂

78. The name of CaSO₄. ½ H₂O is

Dolomite

Plaster of Paris

Gypsum

Epsom salt

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

Magnesium

Cobalt

Iron

Chromium

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

D

A

C

B

81. 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.

CO₂

Argon

Greater amount of nitrogen molecules derived from N¹⁵ isotope

Some nitrogen molecules analogous to O₂

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

Fluorine

Chlorine

Iodine

Bromine

83. The substance not likely to contain CaCO₃ is

Calcried gypsum

Dolomite

Sea shells

A marble states

84. Which of the following is true for magnesium?

It is more electropositive than sodium

It is manufactured by electrolysis of aqueous magnesium chloride

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

It is a strong reducing agent

85. Crystalline form of sulphur stale at room temperature is

Prismatic sulphur

Plastic sulphur

Rhombic sulphur

Monoclinic sulphur

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

NaAlO₂

Na₂Al(OH)₄

Al₂(OH)₄

Na₃AlO₃

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

12, 20, 56, 88

37, 19, 3, 55

9, 17, 35, 53

1, 12, 30, 4, 62

88. Which of the following has highest dipole moment?

SbH₃

AsH₃

PH₃

NH₃

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

Ionization energy

Lattice energy

Electron affinity

Hydration energy

90. 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

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

Li⁺

B³⁺

F¯

O²¯

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

Mg

Sr

Ba

Ca

93. Which is the most volatile compound?

HF

HBr

HI

HCl

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

Hypo phosphorous acid

Orthophosphoric acid

Pyro phosphoric acid

Metaphosphoric acid

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

Nitride ion

Chloride ion

Sodium ion

Fluoride ion

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

Different resistance under different circumstance

Decrease in resistance with increase in temperature

Decease in resistance with intensity of light

Increase in resistance with increase in temperature

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

I

F

Cl

Br

98. Which of the noble gas has highest polarizabilities?

Kr

Xe

Ar

He

99. 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

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

Mercuric oxide

Potassium chlorate

Manganese dioxide

Lead nitrate

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

HeF₄

CF₄

SF₄

XeF₄

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

M₂O

MO₂

MO

M₂O₃

103. The important ore of lead is

Chalcopyrites

Galena

Bauxite

Haematite

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

Borazole is polar compound

Borazole is nonpolar compound

Borazole is electron deficient compound

Of localized electrons in it

105. 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

Bauxite is less impure

Of easy extraction of Al from it

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

It changes into calcium chloride and calcium chlorate

It change into calcium hypochlorate

It absorbs moisture

It changes into CaCl₂ and Ca(OH)₂

107. Which of the following is most electronegative?

Lead

Carbon

Silicon

Tin

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

35.45 g

88.60 g

70.90 g

17.72 g

109. Fluorine differs from other halogens due to

Low first ionization energy

High dissociation energy

All

Small size

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

He

Ar

Ne

Xe

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

Weak acid and weak base

Strong acid and strong base

Weak acid and strong base

Strong acid and weak base

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

Neon

Argon

Krypton

Helium

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

Cr

Cu

Cs

Ba

114. Which one is hygroscopic in nature?

HNO3

HCL

HUO4

HBr

115. Which statement is correct?

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

Noble gases will all burn in pure oxygen

None of these

Noble gases are all dense gases

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

Iron and sulphur

Gallium and Germanium

Aluminum and silicon

Proton and silicon

117. The noble gas forming the maximum number of compounds

Xe

He

Ar

Ne

118. The halogen having highest electron affinity is

Chlorine

Iodine

Fluorine

Bromine

119. The last orbit of argon would have electrons

2

8

6

18

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

33%

22%

11%

44%

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

KCl

BaSO₄

CuSO₄

NaCl

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

Sulphur dioxide

Iodide

Carbon dioxide

Chlorine

123. Who reported first noble gas?

Cavendish

Ramsay

J.J Thomson

Frank land

124. 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

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

Nitrosyl chloride

Phosphorus trichloride

Nitrogen trichloride

Hyponitrous acid

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

Kl is soluble in benzene

Lattice energy of CaO is much higher than that of Kl

CaO has high m.p.

Kl has high m.p.

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

Oxygen family

Halogens

Alkali metals

Nitrogen family

128. Which shows maximum catenation property?

S

O

Se

Te

129. 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 as fire proof in textile

It is used furniture polish

130. 6NaOH + Cl₂ → 5Nacl + Naclo₃ in this reaction chlorine is

Both oxidized and reduced

Oxidized

Reduced

No change

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

Greater hardness

Smaller ionic radii

Highest boiling points

Lower ionization energies

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

Fourth

Third

Fifth

Sixth

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

F > Cl > Br

Cl > F > Br

F > Br > Cl

Br > Cl > F

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

ZnS

MnS

BaCO₃

BaSO₄

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

Less soluble in water

Insoluble in water

Highly soluble in water

Variable trend

136. Orthophosphoric acid is

Tribasic

Dibasic

Monobasic

Tetrabasic

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

CO

CO₂

NH₃

Al₂O₃

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

Entropy of solution formation

Hydration energies of cations

Inter – ionic attraction

Lattice energy solids

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

Strong oxidizing agents

Weak reducing agents

Strong reducing agents

Weak oxidizing agents

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

CaC₂

CaO

CaCO₃

Ca and CO₂

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

Atomic radius

Boiling point

Density

Ionization energy

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

Be

C

Si

Al

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

Neon

Argon

Radon

Xenon

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

NH₃ + H₂CO₃ → NH₄HCO₃

CO₃ + H₂O → H₂CO₃

2NaOH + CO₂ → Na₂CO₃ + H₂O

NaCl + NH₄HCO₃ → NaHCO₃ + NH₄Cl

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

I₂

F₂

Cl₂

Br₂

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

Sodium hydride

Sodium azide

Sodium nitride

Sodium amide

147. Sea weeds are important source of

Iron

Bromine

Iodine

Chlorine

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

Low electronegativity

Lower electro positivity

Low charge density

None

149. 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-3, b-1, c-4, d-2

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

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

150. 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

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151. The colour of I₂ in CCI₄ is

Radish brown

Bluish green

Violet

Colourless

152. Bond angle is minimum for

H₂O

H₂S

H₂Se

H₂Te

153. In which form boron exist mostly in nature

Sulphides

Oxides

Oxyborates

Nitrides

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

Radium

Astatine

Francium

Polonium

155. 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

156. Which one is the biggest ion?

Na⁺

Mg²⁺

Al³⁺

Ba²⁺

157. Calico printing means

Glass printing

Paper printing

Cloth printing

Leather printing

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

16

11

14

10

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

First ionization energy

Melting point

Electro negativity

Ionic radius

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

Entropy of solution formation

Hydration energies of cations

Inter ionic attraction

Lattice energies if solids

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

He⁺

Na

Li⁺

H

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

As

Si

P

O

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

200

1000

250

400

164. Identify the correct statement

Elemental Na is easily oxidized

Elemental Na is insoluble in NH₃

Elemental Na is a strong oxidizing agent

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

165. XeF₄ on partial hydrolysis produces

XeF₂

XeOF₄

XeO₃

XeOF₂

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

Si

S

Fe

Pb

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

Ar is used in electric bulbs

HE is used in producing very low temperatures

Ne is obtained during radioactive disintegration

Half-life of Rn is only 3-8 days

168. Which one halogen is radioactive?

Chlorine

Astatine

Bromine

Iodine

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

Phosphorus pentoxidse

Active charcoal

Na₃PO₄

Anhydrous calcium chloride

170. SO3 is not dissolve directly in H2O because

The reaction is quite slow

SO₃ is insoluble in H₂O

The reaction is highly exothermic

The reaction does not go to completion

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

The lattice energy has no role to play in solubility

The hydration energy of Na₂SO₄ is more than its lattice energy

Both a and b

The lattice energy of BaSO₄ is more than its hydration energy

172. The melting point in lowest for

Ca

Be

Mg

Sr

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

Ca, Cl

Na, Cl

Na, Ca

Cl, Br

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

More electron repulsion in fluorine

Small size of fluorine

More electro negativity of fluorine

Non-metallic nature of fluorine

175. Select the weakest acid among the following

HF

HBr

HCl

HI

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

Potassium only

Magnesium and chlorine

Potassium and magnesium

Magnesium only

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

Al

Fe

Mg

Na

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

SO₂

HCl

HBR

H₂S

179. Which one of these is most reactive?

Pb

K

Na

Mg

180. 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 lowest ionization enthalpy

Has the highest heat of vaporization

In the most readily available gas

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

H₂

Cl₂

O₂

Na

182. Which is the strongest acid

HNO3

Cannot be predicted

HCLO4

HCL

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

Magnesium ammonium phosphate

Magnesium sulphates

Ferrous ammonium sulphate

Calcium sulphates

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

F

B

Li

Ne

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

Moisture

Sun light

None of these

Dry air

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

Ar

He

O₂

H₂

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

Li

Ba

K

Rb

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

Carbon

Oxygen

Boron

Nitrogen

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

Low electronegativity

Low melting point

Their ions are isoelectronic with noble gases

High ionization energy

190. The shape of gaseous SnCl₂ is

Angular

Tetrahedral

Linear

t-shaped

191. Among noble gases xenon gives compounds due to

Structure

Zero electron affinity

Large size

Higher I-P

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

Cl

Br

I

F

193. Strongest reducing agent is

HCl

HBr

HF

Hl

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

1½

½

5/2

2

195. Which of the following oxides is peroxide?

Na₂O₂

Mn₂O

SO₂

BaO

196. Identify the correct statement

Gypsum contains a lower percentage of calcium than plaster of pairs

Plaster of Paris is obtained by partial oxidation of gypsum

Gypsum is obtained by heating plaster of pairs

Plaster of Pairs can be obtained by partial oxidation of gypsum

197. Alkali metals are generally extracted by

Double decomposition methods

Electrolytic methods

Displacement methods

Reduction methods

198. The alkali metals

Show increasing electro negativity from Li to Cs.

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

Form salts which are predominantly covalent

Form salt like hydrides

199. The metal used for making radiation shield is

Fe

Zn

Al

Pb

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

Cl₂ > Br₂ > I₂ > F₂

Br₂ > Cl₂ > F₂ > I₂

I₂ > Br₂ > Cl₂ > F₂

F₂ > Cl₂ > Br₂ > I₂

Page 9 of 14

201. The ionization potential is lowest for the

Halogens

Alkaline earth metals

Inert gases

Alkali metals

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

Extremely high electropositivity of Li

Hydration of Li⁺ ion

Greater hardness of Li

Small size of lithium atom and Li⁺ ion

203. Electron affinity of sulphur is

More than O and Se

Less than O but more than SE

More than O but less than Se

Equal to O and Se

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

To make a conducting solution of bauxite

To protect the anodes

To increase Al production

To act as reducing agent

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

As an abrasive in the form of abundum

As an oxidizer in metallurgy

For preparing artificial

In form of foil for wrapping

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

Isotopic number

Atomic mass

Atomic number

Mass number

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

Strongly bond valence electrons

Small ionic size

Large atomic size

Metallic properties

208. The most powerful oxidizing agent among the halogens is

Br₂

F₂

I₂

Cl₂

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

Strontium

Calcium

Beryllium

Barium

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

ATP

Chlorophyll

Haemoglobin

Florigen

211. Bromine is obtained on a commercial scale from

Carnallite

Caliche

Cryolite

Common salt

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

I

Br

Cl

F

213. What causes nitrogen to be chemically inert?

Multiple bond formation in the molecule

High bond energy

Short internuclear distance

Absence of bond polarity

214. 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

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

2,8

2,8,2

2,8,18,2

2,8,7

216. 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

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

Heat of dissociation

Electron affinity

Ionization potential

Heat of hydration

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

Small ionic size of Li⁺

High ∆H lattice

Low ∆H lattice

High covalent nature

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

Precipitate Mg

Have no effect

Leads to the dissolution of beryllium metal

Precipitate Mg metal

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

Sodium persulphate

Sodium sulphides

Sodiums sulphates

Sodium thiosulphate

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

Both have nearly the same size

The ratio of their charge to size is nearly the same

Both have similar electronic configurations

Both are found together in nature

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

Linear, basic

Tetrahedral, acidic

Linear acidic

Angular, disc

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

Mixture of argon and oxygen

Mixture of helium and oxygen

Mixture of neon and oxygen

Mixture of xenon and nitrogen

224. The halogen that is most easily reduced is

Cl₂

Br₂

F₂

I₂

225. Which of the following is not isoelectronic?

Na⁺

Cl¯

O²¯

Mg²⁺

Page 10 of 14

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

Calcium oxide

Calcium carbonate

Sodium bicarbonate

Sodium carbonate

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

Solvay

Castner

Chamber

Haber

228. Neon glows in discharge tube as

Greenish

Yellowish

Bluish

Radish

229. Which of the following is acidic?

HgO

SO₃

BeO

N₂O

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

Ionization energy

Density

Atomic radius

Boiling point

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

Phosphorus from phosphorite

Iron from haematite

Solvay process of sodium carbonate

Ordinary (soda lime) glass

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

I

F

Cl

Br

233. Which noble gas is used in labors?

Krypton

Helium

Neon

Argon

234. Pyrex glass is a mixture of

Sodium silicate and aluminum borosilicate

Sodium silicate and lead silicate

Sodium silicate and calcium silicate

Sodium borosilicate and aluminum borosilicate

235. Which one has highest electron affinity?

Br

I

F

Cl

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

Br

Cl

F

I

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

It decreases gradually down the group

None of these

Noble gases have o heat of vapourization

It increases gradually down the group

238. An atom with high electro negativity has

Low electron affinity

Low ionization potential

Large size

High ionization potential

239. 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 is more reactive than other halogens

It restricts to oxidation state – 1 only

It has highest first I.E

240. Indicate the correct statement

Alkali metal atom has the smallest size in its period

Alkali metals do not reacts with metals

Alkali metals have ns’ configuring in outermost shells

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

241. Which statement is correct about halogens?

They are all diatomic and form univalent ions

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

They are all capable of exhibiting several oxidation states

They are all diatomic and form divalent ions

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

None of these

With inert gases

With halogens

With alkali metals

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

NaCl

Chlorine

Ki

Iodine solution

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

None of these

O₂+

O₂

O₂-

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

Copper

Sodium

Iron

Lead

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

10

18

32

8

247. 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

Three layers are maintained at different temperatures

There is special arrangement is cell to keep the layers separate

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

248. Cassiterite is an ore of

Ni

Mn

Sb

Sn

249. Mark the smallest atom

F

Cl

I

Br

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

Alumina

Iron oxide

Magnesia

Silica

Page 11 of 14

251. NaOH is prepared by the method

Castner Kellner cell

Down’s cell

Castner cell

Solvay process

252. Alkaline earth metals comes under

Inner transition elements

Transition elements

Representative elements

Halogens

253. Which of the following is most electronegative?

Pb

Si

Sn

C

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

Iodine

Fluorine

Bromine

Chlorine

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

Electro negativity

Ionization energy

Atomic radius

N/P ratio

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

None of these

Se

Te

Po

257. 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

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

Ca²⁺

Cl¯

S²¯

K⁺

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

p-orbitals

None

s-orbitals

d-orbitals

260. Fluorine differs from other halogens due to its small size and restriction of its valence shell to an octet. Mark the correct behavior of fluorine

It has highest first ionization energy

It is more reactive than other halogens

It restricts to oxidation state – 1 only

It has highest electronegativity

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

Chromyl chloride

None

Chromic chloride

Chromous chloride

262. Which of the halogen has highest electronegativity?

Bromine

Iodine

Chlorine

Fluorine

263. The bleaching action of chlorine is due to

Reduction

Chlorination

Oxidation

Hydrogenation

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

Na > Mg > Al > Si

Si > Mg > Al > Na

Al > Mg > Na > Si

Mg > Na > Al > Si

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

Rb

Mg

Li

Cl

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

Converting silver halides to metallic silver

Dissolving out unreacted silver bromide

Reducing solubility of AgBr

Preventing overdeveloping and fogging

267. Which of the following is most volatile?

HCl

HI

HF

HBr

268. Which one has least dissociation energy?

HCL

HF

HBr

HI

269. All the elements of oxygen family are

Radioactive

Non-metals

Polymorphic

Metalloids

270. 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

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

Keep away the sharks

Prevent puncturing by under sea rock

Mark the ship lighter

To prevent the action of water and salt

272. Mark the incorrect statement about ‘Li’

‘Li’ combine with nitrogen directly to form Lithium nitride

‘Li’ has a great tendency to form hydrates

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

‘Li’ is not effected by air

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

Paramagnetic

Antiferromagnetic

Diamagnetic

Ferromagnetic

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

CO₂ and Ar

O₂ and CO₂

O₂ and Ar

O₂ and He

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

HCl

HI

HBr

HF

Page 12 of 14

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

Lighter than air and cheap to produce

Expensive but easy to store in cylinder

Less dense then air and not flammable

Expense, but a very uncreative gas

277. The one which does not show variable valency is

Lead

Barium

Copper

Titanium

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

He

N

Zn

Li

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

Cl₂

F₂

Br₂

I₂

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

Flint glass

Soda glass

Borosilicate glass

Crooke’s glass

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

Reaction with brine solution

Reaction with NaOH

Reaction with CO₂

Presence of NH₃

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

Na

Rb

K

Cs

283. Cl₂O₇ is best prepared by passing by

Chlorine gas over hot HgO

Hydrogen chloride over phosphorus pentoxide

Perchloric acid (CHIO₄) over hot silver oxide

Chlorine and oxygen over hot silver chlorate

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

Ar

Kr

Rn

Xe

285. 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?

SnO₂

CO₂

SiO₂

CaO

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

Increases down the group

Decreases down the group

Variation is not regular

Remains unchanged

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

The first ionization energy

The basic character of the oxides

The stability of +2 oxidation state

Ionic character of the compound

288. Mark the element which shows greatness inert pair effect

Fluorine

Iodine

Chlorine

Bromine

289. Which of the following is an inert gas?

Argon

H₂

N₂

O₂

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

Astatine

Polonium

Radium

Francium

291. The element that does not form a monoxide is

Tin

Silicon

Germanium

Lead

292. Which halogen have most corrosive action on skin?

Chlorine

Br₂

I₂

F₂

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

Helium

Neon

Radon

Argon

294. 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

10mL

800 mL

Zero

295. Aluminum (III) chloride forms a dimer because

It cannot form a trimer

Al belongs to third group

Higher co-ordination can be achieved by Al

Al has high ionization energy

296. Deliquescence is a process in which a solid

Absorbs moisture and turn into liquid

Absorbs moisture and remain solid

Loses water of crystallization

Increases the water of crystallization

297. Hydrochloric acid at 25°C is

Ionic and liquid

Ionic and gas

None of these

Covalent and liquid

298. Boron compounds behave as Lewis acid because of their

Ionization property

Covalent nature

Acidic nature

Electron deficiency

299. Mark the nitrate which decomposes differently on heating

LiNO₃

NaNO₃

KNO₃

RbNO₃

300. Variable valency is characteristic of

Alkali metals

Halogen

Noble gas

Transition elements

Page 13 of 14

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

Fluorine atom is smaller in size

Fluorine is highly reactive

HF molecules form intermolecular H-bonds

HF is the weakest acid

302. Which one is the weakest oxyacid of chlorine?

HCIO₄

HCIO

HCIO₂

HCIO₃

303. Sulphuric acid has great affinity for water because

It hydrolyses the acid

It decomposes the acid

Acid forms hydrates with water

Acid decomposes water

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

Atomic mass increases

Effective nuclear charge increases

Atomic number increases

Additive electrons are accommodated in new electron level

305. 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

306. The noble gas He was discovered by

Chadwick

Rutherford

Frank land and Lockyer

Dorn

307. Which noble gas is used earth quake prediction?

Rn

Ar

He

Kr

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

XeF₆

XeF₄

XeF₃

XeF₂

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

Tetra calcium aluminoferrite

Diclacium silicate

Tri-calcium silicate

Tri-calcium aluminate

310. Permonosulphuric acid is known as

None of these

Marshall’s acid

Sulphuric acid

Carlo’s acid

311. Which is valence shell configuration of halogens?

nS₂, nP₆

ns₂, nP₅

nS₂, nP₃

NS₂, nP₄

312. The noble gases are

Diatomic

All of these

Monoatomic

Polyatomic

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

Br > Cl

Sr > Ca

P > Si

C > N

314. Vander Waals forces are stronger in

Br₂

I₂

F₂

Cl₂

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

NaBr

NaCl

Nal

NaF

316. 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

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

2

10

54

18

318. XeF₄ involves which hybridization

Sp²

Sp²d

Sp³d²

Sp

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

Rn

Ra

Lr

Fr

320. Which gives green colour in fireworks?

Sodium

Potassium

Calcium

Barium

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

Energy dissociation

High atomic number

Electron affinity

Hydration energy

322. Freon-12 is used as a

Fungicide

Refrigerant

Insecticide

Herbicide

323. HNO₂ acts as an/a

Oxidizing agent

Acid

All the three

Reducing agent

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

Iodine

Fluorine

Chlorine

Bromine

325. Which is the strongest acid?

HClO

HClO₄

HClO₃

HClO₂

Page 14 of 14

326. All halogen are

Reducing agents

Drying agents

Oxidizing as well as reducing agents

Oxidizing agents

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

Ne

Mg⁺

Li⁺

Al⁺

328. Hypo is used in photography for

Developing picture

Picture printed

The colour of picture

The fixation of picture

329. The following has zero valency

Na

Al

Be

Kr

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

16

12

14

7

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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