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Chemistry Liquids and Solids Online Mcqs Test

Malik TahirLast Updated: October 14, 2025

Important Chemistry Solids Question and Answer

Total Questions:	150
Time Allowed:	60 Minutes
Total Marks:	150
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	Chemistry Test ECAT Test MDCAT Test FPSC/PPSC/SPSC/KPPSC/BPSC/AJKPSC/NTS Chemistry Interview Question Answer

Chemistry Solids Practice Test Online With Explanation

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Page 1 of 6

Chemistry

1. In which process solid phase and vapour phase are directly involved?

Condensation

Vaporization

Filtration

Sublimation

2. Amorphous substances possess

Sharp B.P.

Definite heat of fusion

Sharp melting points

No definite heat of fusion

3. Which of the following has least mass?

3 x 10²³ atoms of C

7.0 g of Ag.

1 mole of S

2 gram atom of nitrogen

4. Crystal can be classified in to _______ basic crystal habits

5. 4.4 g of CO₂ contains how many liters of CO₂ at STP?

22.4 liter

2.4 liter

2.24 liter

44 liter

6. Pressure remaining constant at which temperature the volume of a gas will become twice o what it is at 0°C

200 °C

546 K

546 °C

0 K

7. In NaCl type structure, the coordination numbers of cation and anions are

6 and 4

6 and 6

4 and 4

8 and 4

8. The deviation of a gas from ideal behavior is maximum at

-10°C and 5.0 atm

100°C and 2.0 atm

-10°C and 2.0 atm

0°C and 2.0 atm

9. a ≠ b ≠ c, ∞ ≠ β ≠ r ≠ 90 is representation of

Trigonal

Mexagonal

Triclimic

Monoclimic

10. Which of the following metal oxides is anti-ferromagnetic in nature?

CrO₂

MnO₂

TiO₂

NO₂

11. The surface formed by the breakage of a crystal is called _________ plane.

Cleavage

Crystal

Unit

None

12. The pure crystalline substance on being heated gradually first forms a turbid liquid at constant temperature and still at higher temperature turbidity completely disappears. The behavior is a characteristic of substance forming

Allotropic crystal

Liquid Crystals

Isomeric crystals

Isomorphous crystals

13. Two moles of an ideal gas at 1 atm are compressed to 2 atm at 273 K. The enthalpy change for the process is

1 liter atm

3 liter atm

2 liter atm

Zero

14. Under what conditions real gases deviate from ideal behavior

High temperature

High pressure

Low temperature

Both b and c

15. Air at sea level is dense. This is a practical application of

Boyle’s law

Avogadro’s law

Charles’ law

Dalton’s law

16. Crystalline solids can be identified easily by their

Sharp m.P

Definite geometry

All of these

Transition temperature

17. The coordination number 8:8 is found in the arrangement of

AB₂ type ionic compound

NaCl type structure

ZnS type structure

CsCl type structure

18. Which of the following equations represents the 2nd ionization energy of Na?

Na(g) → N²⁺ (g) + +¯

Na(s) → N²⁺ (g) + 2e¯

Na(s) → N²⁺ (g) + e¯

Na(g) → N²⁺ (g) + e¯

19. The molar volume of CO₂ is maximum at

127°C and 1 atm

0°C and 2 atm

S.T.P (0°C and 1 atm)

273°C and 2 atm

20. The reaction 4NH₃ + 3O₂ → 2N₂ + 6H₂O indicates that

One mole of NH₃ will produce 6 moles of N₂

For the complete reaction of 2 mole of NH₃ 20g of O₂ are required

For the complete reaction of 2 moles of NH₃ 40g of O₂ are required

One mole of NH₃ will produce ½ mole of N₂

21. Correct order of intermolecular forces

Gas = liquid = solid

Gas < liquid < solid

Liquid < gas < solid

22. In which of the following compounds H – bonding is not present?

Ether

Ammonia

Water

Ethanol

23. ‘x’ grams of calcium carbonate was completely burnt in air. The weight of the solid residue formed is 28 g. What is the value of ‘x’ in grams?

150

200

24. In which one of the following does the central atom not possess an ‘octet’ in its outer shell?

NH₃

CH₄

H₂O

BH₃

25. The number of atoms contained in 11.2 L of SO₂ at S.T.P. are

3/2 x 6.02 x 10²³

2 x 6.02 x 10²³

4 x 6.02 x 10²³

6.02 x 10²³

Page 2 of 6

26. An alkaloid contains 17.28% of nitrogen and its molecular mass is 162. The number of nitrogen atoms present in one molecule of alkaloid is:

Five

Three

Two

Four

27. At constant temperature, the pressure of an ideal gas is doubled, its density becomes

None

Same

Half

Double

28. When the following reaction equations is properly balanced, the number of moles of O₂ will be
C₃H₈ + O₂ → CO₂ + H₂O

3 moles

3.5 moles

10 moles

1.5 moles

29. In a cubic lattice, a unit cell is shared equally by how many unit cells?

30. The following statements contained in a student’s laboratory report is a conclusion

A gas is liberated

The gas is chlorine

Colour of the gas is greenish yellow

Oxide of the gas is strongly acidic

31. The weight of one molecule of a compound C₆₀H₁₂₂ is

1.4 x 10¯²¹ g

1.3 x 10¯²⁰ g

5.01 x 10¯²¹ g

3.72 x 10¯²³ g

32. Gooch crucible is used for the filtration of precipitates having

High concentration

Low temperature

High ignition temperature

High solubility

33. A solid may be made up of

Molecules

A, B and C

Ions

Atoms

34. Which of the following substance is amorphous in nature?

Kcl

Graphite

Plastic

Sugar

35. 100 g of CaCO₃ is treated with 1 liter of 1 NHCl. What would be the weight of CO₂ liberated after the completion of the reaction?

5.5 g

33 g

22 g

11 g

36. Solvents of covalent compounds include all but

Petrol

Alcohol

Water

Tetra chloromethane

37. Which forms metallic crystals?

NaCl

NH₄Cl

SO₂

38. A solution of 10 mL of M/10 FeSO₄ was titrated with KMnO₄ solution in acidic medium, the amount of KMnO₄ used will be

5 mL of 0.1 M

10 mL of 0.5 M

10 mL of 0.02 M

10 mL of 0.1 M

39. The insoluble impurities in the saturated solution are removed by

None

Normal filter paper

Both A & B

Fluted filter paper

40. What is the concentration of nitrate ions, if equal volumes of 0.1 M AgNO₃ and 0.1 M NaCl are mixed together?

0.1 M

0.2 M

0.05 M

0.25 M

41. In diamond, the carbon atoms are arranged in a

Square planner manner

Altahydral manner

Tetrahedral manner

Hexagonal manner

42. Simple molecules or giant macromolecules are examples of

Ionic compounds

Covalent bonds

Diatic bond

Metallic bonds

43. When one of the following statements is wrong for gases?

Mass of gas cannot be determined by weighing a container in which it is enclosed

Volume of the gas is equal to volume of container confining the gas

Confined gas exerts uniform pressure on the walls of its container in all directions

Gases do not have a definite shape and volume

44. Which solids are called true solids?

Metallic

Amorphous

Crystalline

Vitreous

45. The molecules of air don’t settle down. The is due to

Non-polar nature of gases

Different molar mass

Elastic collisions of gas molecules

Pressure of dust particles in air

46. Which of the following substances is not amorphous?

Polymer

Ag NO₃

Rubber

Glass

47. Gases deviate from ideal behavior at high pressure. Which of the following is correct for non – ideality?

At high pressure, the intermolecular attraction becomes significant

At high pressure, the gas molecules move in one direction only

A high pressure, the volume of the gas becomes insignificant

At high pressure, the collisions between the gas molecules are increased manifold

48. A semiconductor of Ge can be made p-type by adding

Tetravalent

Divalent impurity

Pentavalent impurity

Trivalent impurity

49. The existence of a substance in more than one solid modification is known as

None of these

Amorphism

Polymorphism

Isomorphism

50. Which of the following does not represent a type of crystal system?

Triclinic

Isotropical

Monoclinic

Rhombohedral

Page 3 of 6

51. Mean distance between atoms in the range of

0.025 nm

0.25 nm

25 nm

2.5 nm

52. Which of the following techniques is a type paper chromatography in which solvent is in a pool at the bottom of the vessel?

Liquid gas chromatography

Liquid solid chromatography

Ascending paper chromatography

Descending paper chromatography

53. Glass is a

None of these

Micro-crystalline solid

Super-cooled liquid

Gel

54. If rate of diffusion of A is 5 times that of B, what will be the density ratio of A and B?

1/25

1/5

55. Solvent extraction is mostly applied to separate

None of these

Inorganic compounds

Organic compounds

Both A and B

56. The phenomenon in which a compound exists in two or more crystalline forms is called

Anisotropy

Isomorphism

Allotropy

Polymorphism

57. Hydrogen diffuses six times faster than gas A. The molar mass gas of gas A is

58. Which one is not postulated in the kinetic molecular theory among the followings?

Molecules of all the gases have same size and same mass

All molecular collisions are elastic

Molecules are in chaotic motion

The volume of the molecules is negligible as compared to volume occupied by the gas

59. Current strength measure by electrometer by each type of ions in mass spectrometry shows?

Charge

Mass

Relative abundance

Number of isotopes

60. In a crystal a ≠ b ≠ c, a = ϒ = 90° and β ≠ 90°. It is

Tetragonal

Monoclinic

Trigonal

Rhombic

61. Isomorphic substance have

Different physical and same chemical properties

Same physical and chemical properties

Different physical and chemical properties

Same physical and difference chemical properties

62. The material possessing superconducting properties is

Y Ba₂Cu₃O₇

Yb Ba₂Cu₂O₈

Hg Be₂Ca₂Cu₂O₈

Y B₂Cu₃O₇

63. The M.P of ice at Kelvin scale is 237K° and B.P of water is 373 K. This is a known fact that the molar volumes of different gases at S.T.P are

Much larger than the molar volumes of liquids and solids

About the same as the molar volumes of liquids

Little bit less than the molar volumes of solids

Little bit greater than the molar volumes of liquid

64. The ratio of most probable velocity to that of average velocity is

2/π

√π/2

2/√π

π/2

65. The increasing vapour caused by heating a liquid is due to

Increase of intermolecular interactions

Decrease of surface tension

Increase of K.E of molecules

Increase in potential energy of molecules

66. Which of the following crystal does not possess the cubic closed packed arrangement?

Cul

HgS

Agl

Csl

67. Which one is not the partial pressure of oxygen in air

159 torr

159 g/m³

159 g/Cm²

159 mm Hg.

68. Potassium crystallizes with a

Triclinic

Orthogonal lattice

Cubic lattice

Ortho rhombic lattice

69. A bottle of copper (II) oxide has been contaminated with some solid, NaCl, How can NaCl be removed from the Copper (II) oxide?

Add water to the mixture and filter

Add dilute acid to the mixture and filter

Place the mixture in a separating funnel

Heat the mixture and allow it to cool

70. How many Cl¯ ions are there around Na⁺ ion in NaCl crystal?

71. Which of the following contain maximum number of atoms?

5.0 moles of SO₂

44.8 dm3 CO₂ at S.T.P

6 moles of S

20 moles of S8

72. Isotopes differ in

Properties which depend upon mass

Chemical properties

The extent to which they may be affected in electron magnetic field

Arrangement of electrons in orbitals

73. In case of elements the polymorphism is called

Isomorphism

Allotropy

Isotopic form

Crystalline forms

74. A real gas most closely approaches the behavior of an ideal gas at

0.5 atm, and 500 K

15 atm, and 200 K

1 atm, and 273 K

15 tm, and 500 K

75. Which of the following statements is (are correct)?

A unit cell of an ionic crystal shares some of its ions with other unit cells.

The coordination number of each type of ion in CsCl crystal is 8.

A metal that crystallizes in BCC structure has coordination number equal to 12

None of these

Page 4 of 6

76. Which of the following is isotropic

Graphite

Brass

Mercury

Borax

77. The example of hexagonal system is

Sulphur

Sugar

Diamond

Graphite

78. Van der Waal’s forces exist in

Non-polar

Polar compounds

All types of atoms and molecules

Covalent

79. Crystals can be classified into

7 crystal systems

3 crystal systems

4 crystal systems

14 crystal systems

80. The most efficient solvent extraction method is by using

Repeated extraction and small portion of solvent

Single extraction and large portion of solvent

Single extraction and small portion of solvent

Repeated extraction and large portion of solvent

81. A compound formed by elements X and Y crystallizes in a cubic structure in which the X atoms are at the corners of a cube and the Y atoms are at the face-centered. The formula of the compound is

X₃Y

XY₂

XT₃

82. Formation of a cation is?

None

Reduction

Oxidation

Redox

83. The mass of one mole of electron is

1.008 mg

1.673 mg

0.104 mg

0.55 mg

84. 3.2 g of oxygen (At. Wt. = 16) and 0.2 g of hydrogen (At. Wt. = 1) are placed in a 1.12 L flask at 0°C. The total pressure of the gas mixture will be

4 atm

3 atm

2 atm

1 atm

85. Consider the physical properties of the gases. Which of the following statements about particles of gasses is incorrect? The particles are

Having wide spaces

Randomly moving

Causing pressure

Orderly arranged

86. When the temperature is raised, the viscosity of the liquid decreases. This is because of

Increased attraction between the molecules

Increase in temperature increases the average kinetic energy of molecules which overcome the attractive force between them

Decreased covalent and hydrogen bond forces

Decreased volume of the solution

87. Imagine a man is sitting in a room. The room is closed from all sides, no entry, no exit of any gas. If the room expands suddenly then

His blood pressure will increase

He will feel cool

He will feel warmth

There will be no change in the internal environment of the room

88. Among solids, the highest melting point is exhibited by

Ionic solids

Pseudo solids

Covalent solids

Molecular solids

89. Ice is ________ crystal

Molecular

Metallic

Ionic

Covalent

90. The rate of diffusion of a gas is proportional to

P/d

None of these

√P/d

P/√d

91. In the equation PV = nRT which one cannot be numerically equal to R

8.31 L atm K¯¹ mol¯¹

8.31 x 10⁷ erg³ K¯¹ mol¯¹

8.31 x 10⁷ dynes Cm K¯¹ mol¯¹

8.31 JK¯¹ mol¯¹

92. An organic compound contains 49.3% carbon, 6.84% hydrogen and its vapour density is 73. Molecular formula of compound is

C₄H₁₀O₂

C₃H₁₀O₂

C₆H₁₀O₄

C₃H₅O₂

93. Particles that most effects material properties

Valence electrons

Neutrons

Electrons

Protons

94. In crystal structure of sodium chloride, the arrangement of Cl ions is

None of these

Fcc

Both fcc and bcc

Bcc

95. Which of the following are more temperature sensitive?

None of these

Solid crystals

Liquid crystals

Ionic crystals

96. Crystalline solids can be identified easily from their

Colour

Sharp melting point

Transition temperature

Definite geometry

97. Graphite is a good conductor of electricity due to the presence of ________.

Cations

Free valence electrons

Anions

Ione pair of electrons

98. How many allotropic forms are present in carbon?

Three

Five

Two

Four

99. At STP, a container has 1 mole of Ar, 2 moles of CO₂, 3 moles of O₂ and 4 moles of N₂, Without changing the total pressure if one mole of O₂ is removed, the partial pressure of O₂

Is unchanged

Is changed by about 26%

Is halved

Change by 33%

100. Distribution law is employed in which one of the following

Solvent extraction

Crystallization

All

Chromatography

Page 5 of 6

101. The phenomenon in which a single substance exist in two or more crystalline forms is called

Polymorphism

Isomorphism

Anisotropy

Allotropy

102. The volume in liters of CO₂ liberated at STP when 10 grams of 90% pure limestone is heated completely is

22.4

2.24

20.16

2.016

103. What is the relative rate of effusion of CO and CO₂?

CO is 3.75 times faster than CO₂

CO₂ is 1.25 times faster than CO

CO is 1.25 times faster than CO₂

Both diffused at the same time

104. The vapour density of a gas is 11.2. The volume occupied by 11.2 g of this gas at N.T.P. is

11.2 liters

22.4 liters

1 liter

2.24 liters

105. 50dm³ of CO is burnt completely according to reaction 2CO + O₂ – 2CO₂ Choose the correct statement

Volume of CO₂ formed is 25 dm³

Volume of O₂ required is 25 dm³

Volume of CO₂ formed is 60 dm³

Volume of O₂ required is 50 dm³

106. Which of the following is a pseudo solid?

CaF₂

All these

Glass

NaCl

107. The total number of lattice arrangements in different crystal system is

8.0

7.0

3.0

108. For c coordination number of four, anion sits at the center of ________ where corners are occupied by cations

Triangle

Tetrahedron

Octahedron

Cube

109. Repeatable entity of a crystal structure is known as

Miller indices

Unit cell

Lattice

Crystal

110. Which one is not usually used for the crystallization?

Acetone

Acetic acid

Chloroform

Sulphuric acid

111. Ionic solids are characterized by

High vapour pressures

Low melting points

Solubility in polar solvents

Good conductivity in solid state

112. The total number of protons in 10 g of calcium carbonate in (N₀ = 6.023 x 10²³)

2.0478 x 10 ²⁴

3.0115 x 10 ²⁴

4.0956 x 10 ²⁴

1.5057 x 10 ²⁴

113. Number of atoms in 558.5 g of Fe (At. Mass of Fe = 55.85 g mole¯¹) is

558.5 x 6.022 x 10²³

Twice that in 60 g carbon

6.022 x 10²²

Half that in 8 g of He

114. Which is distilled first?

Liquid N₂

Liquid H₂

Liquid CO₂

Liquid O₂

115. Fluted filter paper is used for

Filtering the hot saturated solution

To dissolve large amount of substance at its boiling point

Increasing the rate of filtration

To avoid premature crystallization of the solute

116. The kinetic energy of 4 moles of nitrogen gas at 127°C is? cals. (R = 2 cal mol¯¹ K¯¹)

1524

4400

4800

3200

117. Triple point of water is

203 K

273 K

373 K

193 K

118. Which of the following pairs do not form a dative covalent bond to each other?

CH₄ and AlCl₃

H₂O and H⁺

NH₃ and H⁺

NH₃ and BF₃

119. Super conductors are derived from compounds of

Transition elements

Actinides

Lanthanides

p-block elements

120. Isomorphic substances have

Same physical and different chemical properties

Different physical and chemical properties

Same physical and chemical properties

Different physical and same chemical properties

121. If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of substance will

Increase two fold

Be a function of the molecular mass of substance

Remains unchanged

Decrease twice

122. The volume occupied by 1.4g of N₂ at S.T.P is

2.24 dm³

22.4 dm³

1.12 dm³

112 cm³

123. What will be the external pressure at which water may boil at 120°C?

700 mm of Hg

100 mm of Hg

790 mm of Hg

1489 mm of Hg

124. Which of the following statements about graphite is not true?

The carbon atoms are arranged layers

The coordination number of carbon atoms is 4

The layers in graphite are attracted to each other by weak forces

The carbon atoms use only three of their four outer electrons for covalent bonding

125. The crystal structure having face centered cubic arrangement is

CsCl

BaCl₂

CuCl

NaCl

Page 6 of 6

126. Bragg’s law is given by equation

2nλ = d sin θ

nλ = 2 θ sin θ

nλ = 2 d sin θ

nλ = 1/2d sin θ

127. The introduction of Kelvin scale in thermometry is according to

Graham’s law

Boyle’s law

Dalton’s law

Charles’ law

128. Coordination number of Zn and ZnS (Zinc blends) is

None of these

129. What is the pressure of 2 mole of NH₃ at 27°C when its volume is 5 lit in Van der Waals equation? (a = 0.17, b = 0.03711)

9.2 atm

9.74 atm

10.33 atm

9.333 atm

130. In forming an ionic bond in potassium fluoride, the potassium ion

Gets a single positive charge

Gets a double positive charge

Gets a double negative charge

Gets a single negative charge

131. Which of the following is an example of body centered cube?

Copper

Magneisum

Sodium

Zinc

132. The beaker contains slurry of ice and water, the three thermometers Fahrenheit, Kelvin and centigrade placed in it. The thermometers are represented as A, B and C respectively. On which thermometer the lowest reading will be?

A and C have same reading and are less then B

133. Amorphous substance posses

All of these

No definite geometry

No sharp melting points

No definite heat of fusion

134. The major binding force of diamond, silicon and quartz is

Covalent bond

Electrostatic force

Electrical attraction

Non covalent bond force

135. Which of the following statement is correct if the intermolecular forces in liquids A, B and C are in the order A < B < C?

B evaporates more readily than A

B evaporates less readily than C

A and B evaporates at the same rate

A evaporates more readily than C

136. The relative atomic mass of chlorine is 35.5. What is the m ass of 2 moles of chlorine gas?

35.5g

71g

18.75g

142g

137. The allotropic forms of an element are called

Isoelectronic

Cleavage

Unit Cell

Allotropes

138. The top of funnel stem should touch the side of the beaker because

This gives medium size crystals

This gives bigger size crystals

The filtrate is quick

Filtrate runs down without crystals

139. Which is trigonal crystal?

MgSO₄

NaNO₃

CaSO₄.2H₂O

All

140. Wt. of 112 ml of oxygen at STP on liquefaction would be

0.32 g

0.96 g

0.16 g

0.64 g

141. Which one of the following pair of atoms is most likely to from an ionic bond?

C and F

Na and F

O and F

N and F

142. A malleable solid is one which can be

Converted into sheets

Converted into wires

All of these

Melted easily

143. Half atmospheric pressure is

400 torr

50 662 Pa

101.325 Pa

8.5 Pounds

144. The ratio of close packed atoms to tetrahedral holes in cubic close packing is

1 : 2

1 : 3

1 : 1

2 : 1

145. Which of the following statements about amorphous solids is incorrect?

There is no orderly arrangement of particles

There are rigid and in-compressible

They are anisotropic

They melt over a range of temperature

146. Poor conductors of electricity is a characteristic of

Covalent compounds

Metallic compounds

Diatic bonds

Ionic compounds

147. If the four tubes of a car are filled to the same pressure with N₂, O₂, H₂ and helium separately, then which one will be filled first

H₂

O₂

N₂

148. The body centered cubic arrangement is found in the crystal of

AgBr

CuBr

NH₄Br

CsBr

149. Amorphous solids

Can possess small regions of orderly arrangement of atoms

Undergo clean cleave when cut with knife

Have sharp melting point

Have perfect arrangement of atoms

150. To prepare the medium sized crystal the hot filtrate is cooled

Fast

None

Slowly

Moderately

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Malik TahirLast Updated: October 14, 2025

3 Comments

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