MDCAT Chemistry The Halogens and Noble Gases Online Test

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Chemistry

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

I₂>Br₂>U₂>F₂

I₂>F₂>Br₂>U₂

U₂>Br₂>I₂>F₂

F₂>Cl₂>Br₂>I2

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

33%

11%

22%

44%

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

Ne

B

F

Li

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

Lead

Sodium

Silver

Zinc

5. The substance not likely to contain CaCO₃ is

Calcried gypsum

Sea shells

Dolomite

A marble states

6. Which of the following is correct?

Sodium reduces CO₂ to carbon

Magnesium reacts with cold water and liberates hydrogen

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

Magnallium is one alloy of Mg and zinc

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

Tl

Al

F

Si

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

Chromic chloride

None

Chromyl chloride

Chromous chloride

9. Electropositive character increase down the group due to

Increase in atomic size of elements

Decrease in electronegativity of the elements

All of these

Decrease in I.P

10. Which of the halogen has highest electronegativity?

Fluorine

Iodine

Chlorine

Bromine

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

Precipitate Mg

Leads to the dissolution of beryllium metal

Have no effect

Precipitate Mg metal

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

F > Cl > Br

F > Br > Cl

Cl > F > Br

Br > Cl > F

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

Atomic number increases

Effective nuclear charge increases

Atomic mass increases

Additive electrons are accommodated in new electron level

14. Freon-12 is used as a

Fungicide

Refrigerant

Insecticide

Herbicide

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

2

½

5/2

1½

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

S

Cl

F

I

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

Cu

Cr

Cs

Ba

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

Helium

Neon

Radon

Argon

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

CaO has high m.p.

Kl is soluble in benzene

Kl has high m.p.

Lattice energy of CaO is much higher than that of Kl

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

Keep away the sharks

To prevent the action of water and salt

Mark the ship lighter

Prevent puncturing by under sea rock

21. All the elements of oxygen family are

Non-metals

Metalloids

Polymorphic

Radioactive

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

Potassium and magnesium

Potassium only

Magnesium only

Magnesium and chlorine

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

Strongly bond valence electrons

Large atomic size

Metallic properties

Small ionic size

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

2,8,2

2,8

2,8,18,2

2,8,7

25. The metal used for making radiation shield is

Al

Pb

Zn

Fe

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

As an abrasive in the form of abundum

In form of foil for wrapping

As an oxidizer in metallurgy

For preparing artificial

27. The most powerful oxidizing agent among the halogens is

Br₂

I₂

Cl₂

F₂

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

Phosphorus trichloride

Nitrosyl chloride

Hyponitrous acid

Nitrogen trichloride

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

Metaphosphoric acid

Pyro phosphoric acid

Orthophosphoric acid

Hypo phosphorous acid

30. 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

31. Neon glows in discharge tube as

Greenish

Radish

Yellowish

Bluish

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

Li⁺

H

He⁺

Na

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

Sodium sulphides

Sodium persulphate

Sodiums sulphates

Sodium thiosulphate

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

Boron

Oxygen

Nitrogen

Carbon

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

F₂

I₂

Br₂

Cl₂

36. Which is valence shell configuration of halogens?

ns₂, nP₅

nS₂, nP₃

nS₂, nP₆

NS₂, nP₄

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

Ar is used in electric bulbs

Half-life of Rn is only 3-8 days

Ne is obtained during radioactive disintegration

HE is used in producing very low temperatures

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

Calcium sulphates

Magnesium sulphates

Magnesium ammonium phosphate

Ferrous ammonium sulphate

39. Which one boric acid is stable one?

None of these

H₂B₄O₇

H₃BO₃

HBO₃

40. The melting point in lowest for

Sr

Ca

Be

Mg

41. Sulphuric acid has great affinity for water because

It hydrolyses the acid

Acid decomposes water

It decomposes the acid

Acid forms hydrates with water

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

88.60 g

17.72 g

35.45 g

70.90 g

43. What is more true about alkali metals?

Hydrolyzing agents

Oxidizing agents

Reducing agents

Both oxidizing and reducing agents

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

F

Br

I

Cl

45. Which of the noble gas has highest polarizabilities?

Ar

Kr

Xe

He

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

Potassium chlorate

Manganese dioxide

Mercuric oxide

Lead nitrate

47. Which of the following is most volatile?

HCl

HF

HI

HBr

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

Pb

S

Si

Fe

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

Iron

Lead

Copper

Sodium

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

Paramagnetic

Ferromagnetic

Diamagnetic

Antiferromagnetic

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51. Which of the following is most electronegative?

Si

Sn

Pb

C

52. Which of the following has highest dipole moment?

SbH₃

AsH₃

PH₃

NH₃

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

Fluorine

Iodine

Bromine

Chlorine

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

Cobalt

Magnesium

Iron

Chromium

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

Chlorine

Iodine

Fluorine

Bromine

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

Po

None of these

Te

Se

57. Sea weeds are important source of

Bromine

Iron

Chlorine

Iodine

58. Mark the smallest atom

F

Br

I

Cl

59. Boron compounds behave as Lewis acid because of their

Covalent nature

Ionization property

Acidic nature

Electron deficiency

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

Dipole-dipole forces

H. bonding

Strongest vanderwaal’s force

None of these

61. The ionization potential is lowest for the

Inert gases

Halogens

Alkali metals

Alkaline earth metals

62. The correct formula of Plaster of Paris is

CaSO₄. 1/2H₂O

CaSO₄

CaSO₄.2H₂O

CaSO₄. 3H₂O

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

Reaction with CO₂

Reaction with NaOH

Reaction with brine solution

Presence of NH₃

64. Which of the following is an inert gas?

H₂

N₂

Argon

O₂

65. NaOH is prepared by the method

Down’s cell

Castner cell

Solvay process

Castner Kellner cell

66. Alkali metals are generally extracted by

Displacement methods

Reduction methods

Electrolytic methods

Double decomposition methods

67. 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

Lighter than air and cheap to produce

Less dense then air and not flammable

68. The name of CaSO₄. ½ H₂O is

Gypsum

Plaster of Paris

Dolomite

Epsom salt

69. The one which does not show variable valency is

Copper

Lead

Barium

Titanium

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

XeF₄

XeF₂

XeF₃

XeF₆

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

Br

F

Cl

I

72. 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

73. Mark the element which shows greatness inert pair effect

Fluorine

Chlorine

Bromine

Iodine

74. In which form boron exist mostly in nature

Oxides

Sulphides

Nitrides

Oxyborates

75. Halogens exist in the form of

Cannot be predicted

Various forms

Diatomic molecules

Monoatomic molecules

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76. The halogen which has only one oxidation state is

Cl

Br

I

F

77. Which halogen is most electropositive?

I

F

Cl

Br

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

Solvay process of sodium carbonate

Ordinary (soda lime) glass

Phosphorus from phosphorite

Iron from haematite

79. Which one halogen is radioactive?

Bromine

Iodine

Chlorine

Astatine

80. Which gas can support combustion?

N₂

N₂O

CO₂

CO

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

ATP

Haemoglobin

Florigen

Chlorophyll

82. Cassiterite is an ore of

Sb

Sn

Ni

Mn

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

Increase in resistance with increase in temperature

Decrease in resistance with increase in temperature

Different resistance under different circumstance

Decease in resistance with intensity of light

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

Na₂Al(OH)₄

Al₂(OH)₄

NaAlO₂

Na₃AlO₃

85. Electron affinity of sulphur is

Equal to O and Se

More than O but less than Se

More than O and Se

Less than O but more than SE

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

Francium

Radium

Polonium

Astatine

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

More electron repulsion in fluorine

More electro negativity of fluorine

Small size of fluorine

Non-metallic nature of fluorine

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

I

F

Br

Cl

89. The most abundant inert gas in the atmosphere is

Ne

He

Ar

Kr

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

MnS

ZnS

BaCO₃

BaSO₄

91. Orthophosphoric acid is

Tribasic

Dibasic

Tetrabasic

Monobasic

92. Aluminum (III) chloride forms a dimer because

It cannot form a trimer

Higher co-ordination can be achieved by Al

Al has high ionization energy

Al belongs to third group

93. 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

Some nitrogen molecules analogous to O₂

Argon

Greater amount of nitrogen molecules derived from N¹⁵ isotope

94. 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

95. Which shows maximum catenation property?

Se

S

O

Te

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

H₂

Ar

O₂

He

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

Lose 3 electrons

Lose 2 electrons

Gain 3 electrons

Gain 2 electrons

98. Nitrolim is

Ca(CN)₂ + C

CaCN₂ + C

All

CaC₂ + C

99. Among noble gases xenon gives compounds due to

Large size

Zero electron affinity

Structure

Higher I-P

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

Coordinate

Ionic

Covalent

Metallic

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

Iodide

Sulphur dioxide

Chlorine

Carbon dioxide

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

NaF

Nal

NaCl

NaBr

103. Cl₂O₇ is best prepared by passing by

Chlorine and oxygen over hot silver chlorate

Chlorine gas over hot HgO

Hydrogen chloride over phosphorus pentoxide

Perchloric acid (CHIO₄) over hot silver oxide

104. 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-4, b-1, c-3, d-2

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

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

Na

O₂

H₂

Cl₂

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

14

16

10

11

107. 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

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

Si

C

Be

Al

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

Extremely high electropositivity of Li

Hydration of Li⁺ ion

Small size of lithium atom and Li⁺ ion

Greater hardness of Li

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

Radium

Polonium

Astatine

Francium

111. Permonosulphuric acid is known as

None of these

Sulphuric acid

Carlo’s acid

Marshall’s acid

112. Which of the following is true for magnesium?

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

It is more electropositive than sodium

113. Identify the incorrect statement with respect to ozone.

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

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

Ozone is more reactive than dioxygen

Ozone is diamagnetic whereas dioxygen is paramagnetic

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

Iron and sulphur

Gallium and Germanium

Proton and silicon

Aluminum and silicon

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

Zinc

Copper

Aluminum

Iron

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

Three layers are maintained at different temperatures

There is special arrangement is cell to keep the layers separate

Three layers have different densities

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

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

Li

Zn

He

N

118. Which of the following is acidic?

SO₃

HgO

N₂O

BeO

119. Who reported first noble gas?

Cavendish

J.J Thomson

Frank land

Ramsay

120. Common oxidation state of boron are

+3

+1

+3,-3

-3

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

He

Ne

Rn

Ar

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

Cl¯

K⁺

Ca²⁺

S²¯

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

Chloride ion

Fluoride ion

Sodium ion

Nitride ion

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

Ionization energy

Atomic radius

Density

Boiling point

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

Strong reducing agents

Strong oxidizing agents

Weak reducing agents

Weak oxidizing agents

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

32

18

8

10

127. Which halogen have most corrosive action on skin?

F₂

I₂

Chlorine

Br₂

128. Which one of these is most reactive?

K

Mg

Na

Pb

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

Bromine

Chlorine

Fluorine

Iodine

130. The noble gases are

All of these

Diatomic

Polyatomic

Monoatomic

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

Sun light

None of these

Moisture

Dry air

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

Linear, basic

Linear acidic

Tetrahedral, acidic

Angular, disc

133. The colour of I₂ in CCI₄ is

Violet

Radish brown

Bluish green

Colourless

134. Mark the compound which does not exist

NCl₅

PF₅

AsF₅

SbCl₅

135. 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

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

None

Low charge density

Lower electro positivity

Low electronegativity

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

Ca

Mg

Sr

Ba

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

Remains unchanged

Increases down the group

Decreases down the group

Variation is not regular

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

Silica

Iron oxide

Alumina

Magnesia

140. Indicate the correct statement

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

Alkali metals do not reacts with metals

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

Cl

F

I

Br

142. The acid which has a peroxy linkage is

Pyrosulphuric acid

Dithionic acid

Sulphurous acid

Carlo’s acid

143. Crystalline form of sulphur stale at room temperature is

Monoclinic sulphur

Rhombic sulphur

Prismatic sulphur

Plastic sulphur

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

Calomel

Borax

Gypsum

Alum

145. Deliquescence is a process in which a solid

Absorbs moisture and remain solid

Absorbs moisture and turn into liquid

Loses water of crystallization

Increases the water of crystallization

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

Strong acid and weak base

Weak acid and weak base

Strong acid and strong base

Weak acid and strong base

147. Oxygen shows oxidation states

-2

+2, +4, +6

-2, +2, +6

+2, -2

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

Lr

Ra

Rn

Fr

149. The structure of XeF₆

Distorted octahedral

None of these

Pyramidal

Tetrahedral

150. 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 is more reactive than other halogens

It restricts to oxidation state – 1 only

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

10

40

20

30

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

Third

Fourth

Sixth

Fifth

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

Ionic character of the compound

The basic character of the oxides

The first ionization energy

The stability of +2 oxidation state

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

Melting point

Electro negativity

First ionization energy

Ionic radius

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

There is no change in the nuclear charge

None of these

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

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

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

HBR

SO₂

H₂S

HCl

157. The alkali metals

Form salt like hydrides

Form salts which are predominantly covalent

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

Show increasing electro negativity from Li to Cs.

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

As

O

P

Si

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

Cl

I

Br

F

160. Which statement is correct?

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

Noble gases will all burn in pure oxygen

Noble gases are all dense gases

None of these

161. Plaster of Paris is used

As a plaster for walls

In dentistry and surgery

In metallurgical process

As a drying agent

162. Among the halogens the rare element is

Iodine

Fluorine

Astatine

Chlorine

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

54

2

18

10

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

Ionization potential

Heat of hydration

Electron affinity

Heat of dissociation

165. Which gives green colour in fireworks?

Sodium

Calcium

Potassium

Barium

166. 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

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

Sodium hydride

Sodium amide

Sodium azide

Sodium nitride

168. Which statement is true about IV A group

Marked change of properties

There is a regular gradation of properties from top to bottom

Abrupt change of properties

Whole group consist of non-metals

169. Bond angle is minimum for

H₂Se

H₂Te

H₂O

H₂S

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

Dinitrogen tetraoxide

Nitrogen dioxide

Nitrous oxide

Nitric oxide

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

Lattice energy

Ionization energy

Hydration energy

Electron affinity

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

Active charcoal

Phosphorus pentoxidse

Na₃PO₄

Anhydrous calcium chloride

173. What causes nitrogen to be chemically inert?

Absence of bond polarity

Short internuclear distance

High bond energy

Multiple bond formation in the molecule

174. P₂O₅ is heated with water to give

Phosphorous acid

Orthophosphoric acid

Hypo phosphorous acid

Hypo phosphoric acid

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

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

Nitrogen is highly soluble in water

Helium is much less soluble in blood than nitrogen

Nitrogen is much less soluble in blood than helium

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

CO

CO₂

Al₂O₃

NH₃

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

Free ions

Free molecules

Atoms of sodium and chlorine

Free electrons

178. The shape of gaseous SnCl₂ is

Linear

t-shaped

Angular

Tetrahedral

179. The type of hybridization of born in diborane is

Sp³d²-hybridisation

Sp-hybridisation

Sp²-hybridisation

Sp³- hybridization

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

Sodium carbonate

Calcium oxide

Sodium bicarbonate

Calcium carbonate

181. The noble gas forming the maximum number of compounds

Ne

He

Ar

Xe

182. Bromine is obtained on a commercial scale from

Caliche

Cryolite

Common salt

Carnallite

183. 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

184. Strongest reducing agent is

HCl

Hl

HF

HBr

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

Highest boiling points

Smaller ionic radii

Greater hardness

Lower ionization energies

186. The following has zero valency

Na

Kr

Al

Be

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

Xenon

Neon

Radon

Argon

188. Which halogen has application in medicines mostly?

Cl₂

None

I₂

Br2

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

O₂

O₂-

None of these

O₂+

190. An atom with high electro negativity has

High ionization potential

Large size

Low electron affinity

Low ionization potential

191. Hydrochloric acid at 25°C is

Ionic and liquid

Ionic and gas

None of these

Covalent and liquid

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

CO₃ + H₂O → H₂CO₃

NaCl + NH₄HCO₃ → NaHCO₃ + NH₄Cl

2NaOH + CO₂ → Na₂CO₃ + H₂O

NH₃ + H₂CO₃ → NH₄HCO₃

193. Which of the following has greatest reducing power?

HI

HCl

HBr

194. Which one has highest electron affinity?

Cl

F

I

Br

195. Mark the nitrate which decomposes differently on heating

RbNO₃

NaNO₃

LiNO₃

KNO₃

196. XeF₄ involves which hybridization

Sp³d²

Sp²d

Sp²

Sp

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

Neon

Nitrogen

Helium

Oxygen

198. Which of the following is not isoelectronic?

Mg²⁺

Cl¯

O²¯

Na⁺

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

Chlorine

Iodine

Fluorine

Bromine

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

1, 12, 30, 4, 62

37, 19, 3, 55

9, 17, 35, 53

12, 20, 56, 88

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

In the atmosphere

As salts in ponds

In sea

In lakes

202. The most acidic of the following compounds is

B₂O₃

P₂O₃

Sb₂O₃

As₂O₃

203. Which is the most volatile compound?

HBr

HI

HF

HCl

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

Reducing solubility of AgBr

Preventing overdeveloping and fogging

Converting silver halides to metallic silver

Dissolving out unreacted silver bromide

205. Which of the following is most electronegative?

Silicon

Lead

Carbon

Tin

206. Sulphuric acid reacts with PCl₅ to give

Thionyl chloride

Sulphuryl chloride

Sulphur monochloride

Sulphur tetrachloride

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

O > C > B > N

O > C > N > B

O > B > C > N

B > N > C > O

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

A

D

B

C

209. Which one has least dissociation energy?

HI

HF

HCL

HBr

210. The halogen having highest electron affinity is

Iodine

Fluorine

Bromine

Chlorine

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

Weak van der Waals forces between atoms

High polarisability

Gaseous nature

Inertness

212. Mark the incorrect statement about ‘Li’

‘Li’ combine with nitrogen directly to form Lithium nitride

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

‘Li’ is not effected by air

‘Li’ has a great tendency to form hydrates

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

Hydration energy

Electron affinity

High atomic number

Energy dissociation

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

H₂O₂

O₂

CO

CO₂

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

Fluorine atom is smaller in size

HF molecules form intermolecular H-bonds

HF is the weakest acid

Fluorine is highly reactive

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

It has oxidation state of +4

It forms R₂O₃

It forms RX₂

It is a gas at room temperature

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

High lattice energy of M²⁺ ions in the solid state

None of these of M²⁺ ions

High energies of hydration of M²⁺ in solution

Diamagnetic nature

218. The bleaching action of chlorine is due to

Chlorination

Oxidation

Reduction

Hydrogenation

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

CO₂

CaO

SiO₂

SnO₂

220. The last orbit of argon would have electrons

6

18

2

8

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

They have high electron affinity and ionization energy

All are non-metals

All the halogens react with noble gases to form their halides

All the halogens have electronic configuration ns2P5

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

Solvay

Castner

Haber

Chamber

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

Sr > Ca

P > Si

Br > Cl

C > N

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

Sodium atoms

Sodium amide

Solvated electrons

Sodium hydride

225. Mark the correct statement

Br is more reactive than Cl₂

Cl₂ is more insoluble in water

Iodine is a solid

None of these

Page 10 of 14

226. Fluorine differs from other halogens due to

All

Low first ionization energy

Small size

High dissociation energy

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

F₂ > Cl₂ > Br₂ > I₂

Br₂ > Cl₂ > F₂ > I₂

Cl₂ > Br₂ > I₂ > F₂

I₂ > Br₂ > Cl₂ > F₂

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

The lattice energy of BaSO₄ is more than its hydration energy

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

229. Alkaline earth metals comes under

Inner transition elements

Representative elements

Transition elements

Halogens

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

HF

HCl

HBr

Hl

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

Inter ionic attraction

Hydration energies of cations

Entropy of solution formation

Lattice energies if solids

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

Electron affinity of chlorine is greater than that of fluorine

Fluorine cannot be prepared by electrolysis of fused metal fluorides

Fluorine does not form oxoacid

Bond energy of fluorine is less than that of chlorine

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

Their ions are isoelectronic with noble gases

High ionization energy

Low melting point

Low electronegativity

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

Both have nearly the same size

Both are found together in nature

Both have similar electronic configurations

The ratio of their charge to size is nearly the same

235. The element that does not form a monoxide is

Tin

Silicon

Lead

Germanium

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

H₂O

O₂

Cl₂

H₂

237. A clathrate may be defined as a

Mixture

Solid solution

Liquid crystal

Cage compound

238. Select the weakest acid among the following

HBr

HI

HF

HCl

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

Na, Ca

Cl, Br

Na, Cl

Ca, Cl

240. Which one is the weakest oxyacid of chlorine?

HCIO₄

HCIO

HCIO₃

HCIO₂

241. Which of the following statements is incorrect?

Sodium is the most abundant metallic element in sea water

Melting and boiling points of alkali metals decrease down the group

Ionic character of alkali metal halides decreases down the group

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

242. Which noble gas is used in labors?

Krypton

Helium

Neon

Argon

243. Which of the following phosphorus is most reactive?

Scarlet phosphorus

White phosphorus

Violet phosphorus

Red phosphorus

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

Of easy extraction of Al from it

Bauxite contains maximum of Al

Bauxite is available in large quantity

Bauxite is less impure

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

Rn

Ar

Kr

Xe

246. Identify the correct statement

Gypsum is obtained by heating plaster of pairs

Gypsum contains a lower percentage of calcium than plaster of pairs

Plaster of Paris is obtained by partial oxidation of gypsum

Plaster of Pairs can be obtained by partial oxidation of gypsum

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

It oxidizes potassium iodide

It cannot act as a bleaching agent

It oxidizes mercury

It oxidizes lead sulphides

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

Tri-calcium aluminate

Tri-calcium silicate

Diclacium silicate

Tetra calcium aluminoferrite

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

Converting sand into silici acid

Keeping it cool

Hydrating sand and gravel mixed with cement

Developing interlocking needle like crystals of hydrated silicates

250. Calcium is obtained by

Electrolysis of solution of calcium chloride in water

Electrolysis of molten anhydrous or fused calcium chloride

Reduction of calcium chloride with carbon

Roasting lime stone

Page 11 of 14

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

Mass number

Isotopic number

Atomic number

Atomic mass

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

M₂O

M₂O₃

MO₂

MO

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

Ca and CO₂

CaO

CaCO₃

CaC₂

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

Calcium oxide

Hypochlorous acid

Chlorine

Oxygen

255. 6NaOH + Cl₂ → 5Nacl + Naclo₃ in this reaction chlorine is

Oxidized

No change

Reduced

Both oxidized and reduced

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

Al⁺

Mg⁺

Ne

Li⁺

257. The halogen that is most easily reduced is

Cl₂

Br₂

F₂

I₂

258. The important ore of lead is

Haematite

Galena

Chalcopyrites

Bauxite

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

Strontium

Calcium

Beryllium

Barium

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

Nitrogen family

Alkali metals

Halogens

Oxygen family

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

KCl

CuSO₄

NaCl

BaSO₄

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

Po

Pb

Fe

Te

263. The noble gases consist of

Single free atoms

Triatomic molecules

Diatomic molecules

Atoms linked by weak bonds

264. Which noble gas is used earth quake prediction?

Kr

Ar

Rn

He

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

To act as reducing agent

To make a conducting solution of bauxite

To increase Al production

To protect the anodes

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

F₂

Cl₂

Br₂

I₂

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

OH¯

O³¯

O₂¯²

K⁺

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

O₂ and Ar

O₂ and CO₂

O₂ and He

CO₂ and Ar

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

U

F

Br

O

270. Electron affinity depends on

Atomic number

Atomic size

Atomic size and nuclear charge both

Nuclear charge

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

K

Li

Rb

Ba

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

He

Ne

Xe

Ar

273. White enamel of our teeth is

CaBr₂

Ca₃(PO₄)₂

CaCl₂

CaF₂

274. NaoH is named as caustic soda because

It is used in soda water

It reacts with fats to form soap

It reacts with chlorine gas

It corrodes the organic tissues

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

They contain only one electron in their outermost shell

Page 12 of 14

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

Mg

Fe

Al

Na

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

None of these

It decreases gradually down the group

Noble gases have o heat of vapourization

It increases gradually down the group

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

F¯

O²¯

Li⁺

B³⁺

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

Less soluble in water

Highly soluble in water

Insoluble in water

Variable trend

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

Heavy metals

Halogens

Light metals

Noble gases

281. 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 carbonate

A bromide

282. Polyanion formation is maximum in

Oxygen

Nitrogen

Sulphur

Boron

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

Ionization energy

Electro negativity

N/P ratio

Atomic radius

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

N

P

Li

C

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

Solvated electrons

Sodium amide

Sodium hydride

Sodium atoms

286. 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

10mL

800 mL

200mL

Zero

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

Nuclear neutron-proton number rations

Atomic masses

Atomic numbers

Nuclear masses

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

Krypton

Helium

Argon

Neon

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

HF

HI

HCl

HBr

290. Which of the following oxides is peroxide?

SO₂

Na₂O₂

Mn₂O

BaO

291. Calico printing means

Paper printing

Glass printing

Leather printing

Cloth printing

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

Has the highest heat of vaporization

In the most readily available gas

Has the largest size

Has the lowest ionization enthalpy

293. Pyrex glass is a mixture of

Sodium silicate and aluminum borosilicate

Sodium silicate and lead silicate

Sodium borosilicate and aluminum borosilicate

Sodium silicate and calcium silicate

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

p-orbitals

s-orbitals

None

d-orbitals

295. Which is the strongest acid

HNO3

HCL

HCLO4

Cannot be predicted

296. The noble gas He was discovered by

Frank land and Lockyer

Rutherford

Chadwick

Dorn

297. Hypo is used in photography for

The fixation of picture

Developing picture

The colour of picture

Picture printed

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

Li

Rb

Mg

Cl

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

HBr

HF

HU

HI

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

Cs

Rb

Na

K

Page 13 of 14

301. 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

302. Vander Waals forces are stronger in

F₂

Br₂

I₂

Cl₂

303. All halogen are

Oxidizing agents

Reducing agents

Drying agents

Oxidizing as well as reducing agents

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

Mixture of xenon and nitrogen

Mixture of argon and oxygen

Mixture of helium and oxygen

Mixture of neon and oxygen

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

Flint glass

Soda glass

Crooke’s glass

Borosilicate glass

306. Number of elements present in 5th period is

18

8

24

32

307. Mark the correct statement

Basic carbonates of Mg and Cu are soluble in water

Li₂CO₃ is soluble in water

Carbonates of Na, K, NH₄ are soluble in water

Carbonates of Ca, Ba, Sr are soluble in water

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

Diamond

Graphite

Coke

Coal

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

Lattice energy solids

Hydration energies of cations

Inter – ionic attraction

Entropy of solution formation

310. Which one of them is monoatomic?

Oxygen

Fluorine

Neon

Nitrogen

311. Which one is hygroscopic in nature?

HNO3

HCL

HBr

HUO4

312. 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

Sulphur is present in the mixture as impurity

IV group radicals are precipitated as sulphides

III group radicals are precipitated as hydroxides

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

Low ∆H lattice

High covalent nature

High ∆H lattice

Small ionic size of Li⁺

314. I₂ is solid at room temperature because

It possess hydrogen bonding

It has metallic bond

It is highly electronegative

Its molecule has a large size

315. HNO₂ acts as an/a

Acid

Oxidizing agent

Reducing agent

All the three

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

Atomic radius

Density

Boiling point

Ionization energy

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

Hydration energy of ion

Energy dissociation

Electron affinity

High atomic number

318. Variable valency is characteristic of

Alkali metals

Halogen

Noble gas

Transition elements

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

7

12

14

16

320. The percentage of lead in lead pencil is

70

Zero

80

20

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

HeF₄

XeF₄

CF₄

SF₄

322. 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

323. Which is the strongest acid?

HClO₃

HClO

HClO₄

HClO₂

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

Copper

Magnesium

Phosphorus

Mercury

325. XeF₄ on partial hydrolysis produces

XeO₃

XeOF₄

XeF₂

XeOF₂

Page 14 of 14

326. 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 has highest electronegativity

It restricts to oxidation state – 1 only

It is more reactive than other halogens

327. Which one is the biggest ion?

Al³⁺

Na⁺

Ba²⁺

Mg²⁺

328. Identify the correct statement

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.

Elemental Na is easily oxidized

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

Chlorine

Iodine solution

NaCl

Ki

330. AlCl₃ flumes in moist air because

It is very volatile

HCl is formed in moist air

It is covalent

It is highly hygroscopic

Total Questions:	330
Time Allowed:	80 Minutes
Total Marks:	330
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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Chemistry The Halogens and Noble Gases MCQS Online Test

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MDCAT Chemistry The Halogens and Noble Gases Test

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