MDCAT Chemistry The Halogens and Noble Gases Online Test

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Chemistry

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

A

C

B

D

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

Weak reducing agents

Strong reducing agents

Strong oxidizing agents

Weak oxidizing agents

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

Converting silver halides to metallic silver

Reducing solubility of AgBr

Preventing overdeveloping and fogging

Dissolving out unreacted silver bromide

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

Electron affinity

Heat of hydration

Ionization potential

Heat of dissociation

5. Aluminum (III) chloride forms a dimer because

Al belongs to third group

It cannot form a trimer

Al has high ionization energy

Higher co-ordination can be achieved by Al

6. Plaster of Paris is used

In dentistry and surgery

In metallurgical process

As a plaster for walls

As a drying agent

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

Barium

Beryllium

Calcium

Strontium

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

It is as filter for soap

It is used furniture polish

It is used as fire proof in textile

It is used in the formation white cement

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

Fr

Lr

Rn

Ra

10. HNO₂ acts as an/a

Acid

Reducing agent

All the three

Oxidizing agent

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

37, 19, 3, 55

12, 20, 56, 88

1, 12, 30, 4, 62

9, 17, 35, 53

12. Who reported first noble gas?

J.J Thomson

Ramsay

Cavendish

Frank land

13. Which gives green colour in fireworks?

Potassium

Sodium

Barium

Calcium

14. The noble gas forming the maximum number of compounds

He

Ne

Xe

Ar

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

Their ions are isoelectronic with noble gases

High ionization energy

Low electronegativity

Low melting point

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

Their ionization potential is less than that of other elements

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

They contain only one electron in their outermost shell

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

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

F₂

Br₂

Cl₂

I₂

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

Si

Tl

F

Al

19. Which of the following is not isoelectronic?

Cl¯

Mg²⁺

Na⁺

O²¯

20. The one which does not show variable valency is

Titanium

Lead

Copper

Barium

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

Ionization energy

Density

Atomic radius

Boiling point

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

It increases gradually down the group

None of these

It decreases gradually down the group

Noble gases have o heat of vapourization

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

Weak acid and weak base

Strong acid and weak base

Strong acid and strong base

Weak acid and strong base

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

Gain 3 electrons

Gain 2 electrons

Lose 2 electrons

Lose 3 electrons

25. The metal used for making radiation shield is

Pb

Zn

Al

Fe

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26. 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

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

Hydration energies of cations

Lattice energies if solids

Entropy of solution formation

Inter ionic attraction

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

I

F

Cl

Br

29. Mark the correct statement

Iodine is a solid

Br is more reactive than Cl₂

Cl₂ is more insoluble in water

None of these

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

HBr

HU

HI

HF

31. The colour of I₂ in CCI₄ is

Bluish green

Colourless

Violet

Radish brown

32. The noble gases consist of

Triatomic molecules

Atoms linked by weak bonds

Diatomic molecules

Single free atoms

33. Variable valency is characteristic of

Halogen

Alkali metals

Transition elements

Noble gas

34. The most abundant inert gas in the atmosphere is

Ar

He

Ne

Kr

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

Sodium hydride

Sodium amide

Solvated electrons

Sodium atoms

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

Cu

Cs

Ba

Cr

37. Which is the strongest acid

HNO3

Cannot be predicted

HCLO4

HCL

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

Br

F

Cl

I

39. Which of the following has greatest reducing power?

HBr

HI

HCl

40. Which of the following is most electronegative?

C

Si

Pb

Sn

41. 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

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

I

F

Br

Cl

43. Oxygen shows oxidation states

-2

-2, +2, +6

+2, -2

+2, +4, +6

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

Large atomic size

Small ionic size

Strongly bond valence electrons

Metallic properties

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

Of the oxidation of H₂S gas by some acid radicals

IV group radicals are precipitated as sulphides

III group radicals are precipitated as hydroxides

Sulphur is present in the mixture as impurity

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

HBr

HI

HF

HCl

47. Which one of them is monoatomic?

Oxygen

Nitrogen

Fluorine

Neon

48. 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 more reactive than dioxygen

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

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

Fluoride ion

Nitride ion

Sodium ion

Chloride ion

50. 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

Three layers are maintained at different temperatures

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

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51. Halogens exist in the form of

Monoatomic molecules

Cannot be predicted

Diatomic molecules

Various forms

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

To protect the anodes

To increase Al production

To make a conducting solution of bauxite

To act as reducing agent

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

Low charge density

Low electronegativity

None

Lower electro positivity

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

Aluminum and silicon

Gallium and Germanium

Iron and sulphur

Proton and silicon

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

O³¯

K⁺

O₂¯²

OH¯

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

F

I

Cl

S

57. The important ore of lead is

Galena

Chalcopyrites

Bauxite

Haematite

58. Which halogen have most corrosive action on skin?

F₂

Br₂

Chlorine

I₂

59. Neon glows in discharge tube as

Bluish

Radish

Yellowish

Greenish

60. Nitrolim is

CaCN₂ + C

All

CaC₂ + C

Ca(CN)₂ + C

61. The melting point in lowest for

Mg

Be

Ca

Sr

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

Nitrogen

Oxygen

Boron

Carbon

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

Ba

Li

K

Rb

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

Calcium oxide

Sodium carbonate

Sodium bicarbonate

Calcium carbonate

65. Which one of these is most reactive?

Pb

K

Mg

Na

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

Rn

He

Ar

Ne

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

Nitric oxide

Nitrogen dioxide

Dinitrogen tetraoxide

Nitrous oxide

68. Number of elements present in 5th period is

8

32

24

18

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

H₂O₂

CO₂

CO

O₂

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

Zinc

Aluminum

Copper

Iron

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

Copper

Magnesium

Phosphorus

Mercury

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

It forms RX₂

It forms R₂O₃

It has oxidation state of +4

It is a gas at room temperature

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

Calcium oxide

Hypochlorous acid

Oxygen

Chlorine

74. Boron compounds behave as Lewis acid because of their

Covalent nature

Ionization property

Electron deficiency

Acidic nature

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

Radium

Astatine

Francium

Polonium

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

Dry air

Sun light

None of these

Moisture

77. Which of the following is acidic?

N₂O

HgO

BeO

SO₃

78. SO3 is not dissolve directly in H2O because

The reaction is highly exothermic

The reaction does not go to completion

The reaction is quite slow

SO₃ is insoluble in H₂O

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

Coal

Diamond

Graphite

Coke

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

CO₂

SiO₂

SnO₂

CaO

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

Crooke’s glass

Borosilicate glass

Flint glass

Soda glass

82. Which of the following statements is incorrect?

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

Melting and boiling points of alkali metals decrease down the group

Ionic character of alkali metal halides decreases down the group

Sodium is the most abundant metallic element in sea water

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

N

C

P

Li

84. Bond angle is minimum for

H₂Se

H₂Te

H₂S

H₂O

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

Iodine

Chlorine

Fluorine

Bromine

86. 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

87. Mark the nitrate which decomposes differently on heating

KNO₃

NaNO₃

LiNO₃

RbNO₃

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

32

8

18

10

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

S²¯

Ca²⁺

Cl¯

K⁺

90. Which noble gas is used earth quake prediction?

Kr

He

Ar

Rn

91. Among noble gases xenon gives compounds due to

Large size

Higher I-P

Structure

Zero electron affinity

92. Which of the noble gas has highest polarizabilities?

He

Xe

Kr

Ar

93. P₂O₅ is heated with water to give

Orthophosphoric acid

Hypo phosphorous acid

Phosphorous acid

Hypo phosphoric acid

94. Select the weakest acid among the following

HI

HF

HBr

HCl

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

Mg

Ca

Sr

Ba

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

Entropy of solution formation

Lattice energy solids

Inter – ionic attraction

Hydration energies of cations

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

High covalent nature

Small ionic size of Li⁺

High ∆H lattice

Low ∆H lattice

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

Borazole is polar compound

Borazole is nonpolar compound

Of localized electrons in it

Borazole is electron deficient compound

99. Which halogen is most electropositive?

Cl

F

Br

I

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

F > Br > Cl

Br > Cl > F

F > Cl > Br

Cl > F > Br

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

Solvay process of sodium carbonate

Ordinary (soda lime) glass

Iron from haematite

Phosphorus from phosphorite

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

Reaction with CO₂

Reaction with brine solution

Reaction with NaOH

Presence of NH₃

103. 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

Kl has high m.p.

CaO has high m.p.

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

Neon

Xenon

Argon

Radon

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

None

Chromyl chloride

Chromous chloride

Chromic chloride

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

C

Al

Si

Be

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

N/P ratio

Ionization energy

Electro negativity

Atomic radius

108. Which of the following is most volatile?

HBr

HCl

HI

HF

109. Cassiterite is an ore of

Sb

Mn

Sn

Ni

110. The bleaching action of chlorine is due to

Chlorination

Reduction

Oxidation

Hydrogenation

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

B³⁺

O²¯

F¯

Li⁺

112. 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’ has a great tendency to form hydrates

‘Li’ is not effected by air

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

Silver

Lead

Sodium

Zinc

114. All halogen are

Oxidizing agents

Reducing agents

Oxidizing as well as reducing agents

Drying agents

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

The stability of +2 oxidation state

The basic character of the oxides

The first ionization energy

Ionic character of the compound

116. Which noble gas is used in labors?

Helium

Krypton

Neon

Argon

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

Borax

Alum

Calomel

Gypsum

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

Electron affinity

Lattice energy

Hydration energy

Ionization energy

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

14

10

11

16

120. Hydrochloric acid at 25°C is

Ionic and liquid

None of these

Covalent and liquid

Ionic and gas

121. Mark the element which shows greatness inert pair effect

Iodine

Fluorine

Bromine

Chlorine

122. 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

123. Pyrex glass is a mixture of

Sodium silicate and calcium silicate

Sodium silicate and lead silicate

Sodium borosilicate and aluminum borosilicate

Sodium silicate and aluminum borosilicate

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

For preparing artificial

As an oxidizer in metallurgy

In form of foil for wrapping

As an abrasive in the form of abundum

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

NaBr

NaF

Nal

NaCl

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

HCl

HBr

Hl

HF

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

Al₂(OH)₄

Na₂Al(OH)₄

NaAlO₂

Na₃AlO₃

128. Which of the following oxides is peroxide?

Na₂O₂

SO₂

BaO

Mn₂O

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

HCl

SO₂

HBR

H₂S

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

A sulphate

A nitrate

A bromide

A carbonate

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

None

p-orbitals

s-orbitals

d-orbitals

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

Nuclear neutron-proton number rations

Atomic masses

Nuclear masses

Atomic numbers

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

Na

Li⁺

H

He⁺

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

Po

Te

Fe

Pb

135. The halogen which has only one oxidation state is

Br

Cl

F

I

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

Calcium sulphates

Magnesium sulphates

Magnesium ammonium phosphate

Ferrous ammonium sulphate

137. Freon-12 is used as a

Herbicide

Refrigerant

Insecticide

Fungicide

138. Calico printing means

Cloth printing

Glass printing

Paper printing

Leather printing

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

Fourth

Fifth

Sixth

Third

140. Calcium is obtained by

Roasting lime stone

Electrolysis of molten anhydrous or fused calcium chloride

Electrolysis of solution of calcium chloride in water

Reduction of calcium chloride with carbon

141. A clathrate may be defined as a

Cage compound

Liquid crystal

Mixture

Solid solution

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

Chromium

Cobalt

Iron

Magnesium

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

NaCl

Iodine solution

Chlorine

Ki

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

O

F

U

Br

145. 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

The lattice energy of BaSO₄ is more than its hydration energy

Both a and b

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

In the most readily available gas

Has the largest size

Has the lowest ionization enthalpy

Has the highest heat of vaporization

147. 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

148. 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

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

Al > Mg > Na > Si

Na > Mg > Al > Si

Si > Mg > Al > Na

Mg > Na > Al > Si

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

Copper

Lead

Sodium

Iron

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

Sodium nitride

Sodium azide

Sodium amide

Sodium hydride

152. Mark the compound which does not exist

SbCl₅

PF₅

AsF₅

NCl₅

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

Tri-calcium silicate

Tri-calcium aluminate

Tetra calcium aluminoferrite

Diclacium silicate

154. 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 no change in the nuclear charge

None of these

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

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

Alumina

Iron oxide

Magnesia

Silica

156. 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

157. An atom with high electro negativity has

Low ionization potential

Low electron affinity

Large size

High ionization potential

158. 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 has highest E.N

It restricts to oxidation state – 1 only

It is more reactive than other halogens

159. Orthophosphoric acid is

Tribasic

Tetrabasic

Dibasic

Monobasic

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

Tetrahedral, acidic

Angular, disc

Linear, basic

Linear acidic

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

Coordinate

Covalent

Metallic

Ionic

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

12

7

14

16

163. 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 are found together in nature

Both have similar electronic configurations

164. 6NaOH + Cl₂ → 5Nacl + Naclo₃ in this reaction chlorine is

Reduced

Oxidized

No change

Both oxidized and reduced

165. AlCl₃ flumes in moist air because

HCl is formed in moist air

It is very volatile

It is covalent

It is highly hygroscopic

166. The halogen that is most easily reduced is

F₂

Br₂

Cl₂

I₂

167. What is more true about alkali metals?

Hydrolyzing agents

Reducing agents

Both oxidizing and reducing agents

Oxidizing agents

168. Among the halogens the rare element is

Fluorine

Astatine

Chlorine

Iodine

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

N

Zn

He

Li

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

Insoluble in water

Variable trend

Less soluble in water

Highly soluble in water

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

O₂

H₂O

H₂

Cl₂

172. Which of the following is an inert gas?

N₂

H₂

Argon

O₂

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

Iodine

Bromine

Chlorine

Fluorine

174. The type of hybridization of born in diborane is

Sp³- hybridization

Sp-hybridisation

Sp³d²-hybridisation

Sp²-hybridisation

175. The noble gas He was discovered by

Dorn

Chadwick

Rutherford

Frank land and Lockyer

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176. The ionization potential is lowest for the

Alkaline earth metals

Inert gases

Halogens

Alkali metals

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

Decrease in resistance with increase in temperature

Decease in resistance with intensity of light

Different resistance under different circumstance

Increase in resistance with increase in temperature

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

Expensive but easy to store in cylinder

Less dense then air and not flammable

Lighter than air and cheap to produce

Expense, but a very uncreative gas

179. Which halogen has application in medicines mostly?

I₂

Br2

None

Cl₂

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

Nitrogen

Oxygen

Helium

Neon

181. Which of the following has highest dipole moment?

PH₃

NH₃

AsH₃

SbH₃

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

Bromine

Fluorine

Iodine

Chlorine

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

Electron affinity

Energy dissociation

Hydration energy

High atomic number

184. Electropositive character increase down the group due to

Increase in atomic size of elements

Decrease in I.P

All of these

Decrease in electronegativity of the elements

185. Which shows maximum catenation property?

Se

S

Te

O

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

Kr

Rn

Xe

Ar

187. XeF₄ involves which hybridization

Sp³d²

Sp²

Sp

Sp²d

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

Si

O

As

P

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

Atomic mass

Atomic number

Mass number

Isotopic number

190. The last orbit of argon would have electrons

18

2

6

8

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

Electro negativity

First ionization energy

Ionic radius

Melting point

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

Rb

Cl

Li

Mg

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

None of these

With inert gases

With alkali metals

With halogens

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

Ne

Xe

Ar

He

195. Which one halogen is radioactive?

Bromine

Iodine

Chlorine

Astatine

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

Converting sand into silici acid

Keeping it cool

Developing interlocking needle like crystals of hydrated silicates

Hydrating sand and gravel mixed with cement

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

None of these

O₂-

O₂

O₂+

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

Phosphorus trichloride

Hyponitrous acid

Nitrosyl chloride

Nitrogen trichloride

199. NaoH is named as caustic soda because

It corrodes the organic tissues

It is used in soda water

It reacts with chlorine gas

It reacts with fats to form soap

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

Bond energy of fluorine is less than that of chlorine

Fluorine does not form oxoacid

Electron affinity of chlorine is greater than that of fluorine

Fluorine cannot be prepared by electrolysis of fused metal fluorides

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

Variation is not regular

Decreases down the group

Increases down the group

Remains unchanged

202. 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

203. Sulphuric acid has great affinity for water because

Acid decomposes water

Acid forms hydrates with water

It hydrolyses the acid

It decomposes the acid

204. NaOH is prepared by the method

Castner cell

Solvay process

Castner Kellner cell

Down’s cell

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

Helium

Neon

Radon

Argon

206. Electron affinity depends on

Nuclear charge

Atomic size

Atomic number

Atomic size and nuclear charge both

207. Which one has highest electron affinity?

Br

I

Cl

F

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

Ne

B

F

Li

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

Chamber

Haber

Solvay

Castner

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

40

20

10

30

211. In which form boron exist mostly in nature

Nitrides

Sulphides

Oxides

Oxyborates

212. The correct formula of Plaster of Paris is

CaSO₄. 3H₂O

CaSO₄.2H₂O

CaSO₄. 1/2H₂O

CaSO₄

213. The shape of gaseous SnCl₂ is

Tetrahedral

Linear

t-shaped

Angular

214. Heavy water is obtained by

Simple distillation of water

Dissolving heavy salt in water

Removing impurities of calcium and magnesium form water

Prolonged electrolysis of water

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

F₂>Cl₂>Br₂>I2

I₂>F₂>Br₂>U₂

I₂>Br₂>U₂>F₂

U₂>Br₂>I₂>F₂

216. 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

CO₃ + H₂O → H₂CO₃

NH₃ + H₂CO₃ → NH₄HCO₃

217. The following has zero valency

Be

Na

Kr

Al

218. The structure of XeF₆

Pyramidal

None of these

Tetrahedral

Distorted octahedral

219. The most powerful oxidizing agent among the halogens is

Cl₂

I₂

F₂

Br₂

220. White enamel of our teeth is

CaCl₂

Ca₃(PO₄)₂

CaBr₂

CaF₂

221. Crystalline form of sulphur stale at room temperature is

Prismatic sulphur

Plastic sulphur

Rhombic sulphur

Monoclinic sulphur

222. The noble gases are

Polyatomic

All of these

Diatomic

Monoatomic

223. 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

Some nitrogen molecules analogous to O₂

Greater amount of nitrogen molecules derived from N¹⁵ isotope

CO₂

224. Which one is the biggest ion?

Ba²⁺

Mg²⁺

Na⁺

Al³⁺

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

Mark the ship lighter

Prevent puncturing by under sea rock

Keep away the sharks

To prevent the action of water and salt

Page 10 of 14

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

CaO

CaC₂

CaCO₃

Ca and CO₂

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

Fe

Al

Na

Mg

228. The element that does not form a monoxide is

Tin

Germanium

Silicon

Lead

229. 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

230. Alkaline earth metals comes under

Transition elements

Inner transition elements

Representative elements

Halogens

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

Neon

Krypton

Argon

Helium

232. The substance not likely to contain CaCO₃ is

A marble states

Calcried gypsum

Dolomite

Sea shells

233. Fluorine differs from other halogens due to

Low first ionization energy

High dissociation energy

All

Small size

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

P > Si

Sr > Ca

C > N

Br > Cl

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

Carbon dioxide

Iodide

Sulphur dioxide

Chlorine

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

Fe

Si

S

Pb

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

2,8,7

2,8,2

2,8

2,8,18,2

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

Atoms of sodium and chlorine

Free electrons

Free molecules

Free ions

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

Rb

Cs

Na

K

240. 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

241. Which of the following is correct?

Magnallium is one alloy of Mg and zinc

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

Magnesium reacts with cold water and liberates hydrogen

Sodium reduces CO₂ to carbon

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

Mixture of xenon and nitrogen

Mixture of argon and oxygen

Mixture of neon and oxygen

Mixture of helium and oxygen

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

Mg⁺

Al⁺

Ne

Li⁺

244. The name of CaSO₄. ½ H₂O is

Epsom salt

Dolomite

Plaster of Paris

Gypsum

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

Smaller ionic radii

Lower ionization energies

Greater hardness

Highest boiling points

246. Which is the strongest acid?

HClO

HClO₂

HClO₄

HClO₃

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

XeF₂

XeF₄

XeF₆

XeF₃

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

It absorbs moisture

It changes into calcium chloride and calcium chlorate

It changes into CaCl₂ and Ca(OH)₂

It change into calcium hypochlorate

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

Br₂ > Cl₂ > F₂ > I₂

I₂ > Br₂ > Cl₂ > F₂

F₂ > Cl₂ > Br₂ > I₂

Cl₂ > Br₂ > I₂ > F₂

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

Se

None of these

Po

Te

Page 11 of 14

251. The halogen having highest electron affinity is

Fluorine

Bromine

Iodine

Chlorine

252. 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

Ar is used in electric bulbs

Ne is obtained during radioactive disintegration

253. Common oxidation state of boron are

-3

+1

+3

+3,-3

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

Greater hardness of Li

Hydration of Li⁺ ion

Small size of lithium atom and Li⁺ ion

Extremely high electropositivity of Li

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

18

2

54

10

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

Ca, Cl

Cl, Br

Na, Ca

Na, Cl

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

F

Cl

I

Br

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

Magnesium only

Potassium only

Magnesium and chlorine

Potassium and magnesium

259. Which one is the weakest oxyacid of chlorine?

HCIO₂

HCIO

HCIO₃

HCIO₄

260. Indicate the correct statement

Alkali metals have ns’ configuring in outermost shells

Alkali metal atom has the smallest size in its period

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

Alkali metals do not reacts with metals

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

O₂

H₂

Cl₂

Na

262. Which of the following is most electronegative?

Silicon

Carbon

Tin

Lead

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

Energy dissociation

Hydration energy of ion

Electron affinity

High atomic number

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

O > B > C > N

B > N > C > O

O > C > N > B

O > C > B > N

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

NH₃

Al₂O₃

CO

CO₂

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

Solvated electrons

Sodium hydride

Sodium atoms

Sodium amide

267. Which of the following is true for magnesium?

It is more electropositive than sodium

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

It is a strong reducing agent

It is manufactured by electrolysis of aqueous magnesium chloride

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

M₂O

M₂O₃

MO₂

MO

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

XeF₄

CF₄

HeF₄

SF₄

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

Heavy metals

Light metals

Noble gases

Halogens

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

1000

400

200

250

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

BaSO₄

ZnS

BaCO₃

MnS

273. 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

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

½

5/2

2

1½

275. The most acidic of the following compounds is

As₂O₃

Sb₂O₃

B₂O₃

P₂O₃

Page 12 of 14

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

He

Ar

O₂

H₂

277. Bromine is obtained on a commercial scale from

Cryolite

Common salt

Caliche

Carnallite

278. Which one has least dissociation energy?

HF

HCL

HI

HBr

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

I

F

Cl

Br

280. Vander Waals forces are stronger in

I₂

Cl₂

Br₂

F₂

281. Which one boric acid is stable one?

H₃BO₃

H₂B₄O₇

None of these

HBO₃

282. Which statement is correct?

Noble gases are all dense gases

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

Noble gases will all burn in pure oxygen

None of these

283. What causes nitrogen to be chemically inert?

Absence of bond polarity

High bond energy

Short internuclear distance

Multiple bond formation in the molecule

284. Which is valence shell configuration of halogens?

ns₂, nP₅

nS₂, nP₃

nS₂, nP₆

NS₂, nP₄

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

Orthophosphoric acid

Metaphosphoric acid

Hypo phosphorous acid

Pyro phosphoric acid

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

Haemoglobin

Florigen

Chlorophyll

ATP

287. Hypo is used in photography for

The colour of picture

The fixation of picture

Developing picture

Picture printed

288. Which of the following phosphorus is most reactive?

Red phosphorus

White phosphorus

Scarlet phosphorus

Violet phosphorus

289. The percentage of lead in lead pencil is

Zero

20

70

80

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

Astatine

Radium

Polonium

Francium

291. 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

800 mL

Zero

10mL

292. 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

None of these of M²⁺ ions

High lattice energy of M²⁺ ions in the solid state

Diamagnetic nature

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

None of these

H. bonding

Dipole-dipole forces

Strongest vanderwaal’s force

294. Sulphuric acid reacts with PCl₅ to give

Thionyl chloride

Sulphur monochloride

Sulphuryl chloride

Sulphur tetrachloride

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

As salts in ponds

In lakes

In sea

In the atmosphere

296. The alkali metals

Form salts which are predominantly covalent

Show increasing electro negativity from Li to Cs.

Form salt like hydrides

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

297. Mark the smallest atom

F

Br

Cl

I

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

Precipitate Mg metal

Precipitate Mg

Leads to the dissolution of beryllium metal

Have no effect

299. Which is the most volatile compound?

HBr

HF

HCl

HI

300. 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-4, b-1, c-3, d-2

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

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

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

Page 13 of 14

301. Deliquescence is a process in which a solid

Loses water of crystallization

Absorbs moisture and turn into liquid

Absorbs moisture and remain solid

Increases the water of crystallization

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

22%

33%

11%

44%

303. Which of the halogen has highest electronegativity?

Bromine

Fluorine

Iodine

Chlorine

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

Manganese dioxide

Potassium chlorate

Mercuric oxide

Lead nitrate

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

Effective nuclear charge increases

Additive electrons are accommodated in new electron level

Atomic mass increases

Atomic number increases

306. XeF₄ on partial hydrolysis produces

XeOF₄

XeOF₂

XeF₂

XeO₃

307. Which gas can support combustion?

CO₂

N₂O

CO

N₂

308. All the elements of oxygen family are

Polymorphic

Radioactive

Metalloids

Non-metals

309. Identify the correct statement

Plaster of Paris is obtained by partial oxidation of gypsum

Plaster of Pairs can be 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

310. Strongest reducing agent is

HCl

Hl

HF

HBr

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

Antiferromagnetic

Paramagnetic

Ferromagnetic

Diamagnetic

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

35.45 g

17.72 g

88.60 g

70.90 g

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

Halogens

Alkali metals

Oxygen family

Nitrogen family

314. Electron affinity of sulphur is

Less than O but more than SE

More than O but less than Se

Equal to O and Se

More than O and Se

315. Permonosulphuric acid is known as

Carlo’s acid

Marshall’s acid

None of these

Sulphuric acid

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

CO₂ and Ar

O₂ and CO₂

O₂ and He

O₂ and Ar

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

Atomic radius

Density

Ionization energy

Boiling point

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

Weak van der Waals forces between atoms

Gaseous nature

Inertness

High polarisability

319. Identify the correct statement

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

Elemental Na is easily oxidized

Elemental Na is a strong oxidizing agent

Elemental Na is insoluble in NH₃

320. 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

321. 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

322. Sea weeds are important source of

Chlorine

Bromine

Iodine

Iron

323. The acid which has a peroxy linkage is

Dithionic acid

Carlo’s acid

Sulphurous acid

Pyrosulphuric acid

324. Polyanion formation is maximum in

Nitrogen

Oxygen

Boron

Sulphur

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

Br₂

Cl₂

F₂

I₂

Page 14 of 14

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

Sodium sulphides

Sodiums sulphates

Sodium thiosulphate

Sodium persulphate

327. Which one is hygroscopic in nature?

HBr

HUO4

HCL

HNO3

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

KCl

NaCl

BaSO₄

CuSO₄

329. Alkali metals are generally extracted by

Reduction methods

Double decomposition methods

Displacement methods

Electrolytic methods

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

Fluorine

Chlorine

Iodine

Bromine

Total Questions:	330
Time Allowed:	80 Minutes
Total Marks:	330
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	MDCAT Entry Test Chemistry Online Test Interview Questions about Chemisttry All Universities Entrance Test Recruitments Tests

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