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

0.05 M

0.25 M

0.2 M

0.1 M

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

CO₂ is 1.25 times faster than CO

CO is 1.25 times faster than CO₂

Both diffused at the same time

CO is 3.75 times faster than CO₂

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

2 liter atm

Zero

1 liter atm

3 liter atm

4. Amorphous substances possess

Sharp melting points

Definite heat of fusion

No definite heat of fusion

Sharp B.P.

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

Relative abundance

Charge

Mass

Number of isotopes

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

Anisotropy

Polymorphism

Isomorphism

Allotropy

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

20 moles of S8

44.8 dm3 CO₂ at S.T.P

6 moles of S

5.0 moles of SO₂

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

2/√π

π/2

√π/2

2/π

9. 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

Little bit less than the molar volumes of solids

Much larger than the molar volumes of liquids and solids

About the same as the molar volumes of liquids

Little bit greater than the molar volumes of liquid

10. Solvents of covalent compounds include all but

Tetra chloromethane

Water

Petrol

Alcohol

11. Formation of a cation is?

Reduction

Redox

Oxidation

None

12. The allotropic forms of an element are called

Cleavage

Allotropes

Isoelectronic

Unit Cell

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

8.31 x 10⁷ erg³ K¯¹ mol¯¹

8.31 JK¯¹ mol¯¹

8.31 x 10⁷ dynes Cm K¯¹ mol¯¹

8.31 L atm K¯¹ mol¯¹

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

Triclimic

Mexagonal

Trigonal

Monoclimic

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

0 K

546 °C

200 °C

546 K

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

17. Triple point of water is

273 K

193 K

373 K

203 K

18. Which solids are called true solids?

Crystalline

Amorphous

Metallic

Vitreous

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

Free valence electrons

Ione pair of electrons

Cations

Anions

20. In case of elements the polymorphism is called

Crystalline forms

Isomorphism

Isotopic form

Allotropy

21. Crystals can be classified into

7 crystal systems

4 crystal systems

3 crystal systems

14 crystal systems

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

Water

Ether

Ethanol

Ammonia

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

All molecular collisions are elastic

Molecules of all the gases have same size and same mass

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

Molecules are in chaotic motion

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

The filtrate is quick

This gives medium size crystals

This gives bigger size crystals

Filtrate runs down without crystals

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

Crystallization

Solvent extraction

Chromatography

All

Page 2 of 6

26. Which of the following has least mass?

3 x 10²³ atoms of C

7.0 g of Ag.

2 gram atom of nitrogen

1 mole of S

27. Isotopes differ in

Properties which depend upon mass

Arrangement of electrons in orbitals

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

Chemical properties

28. Correct order of intermolecular forces

Gas < liquid < solid

Gas = liquid = solid

Liquid < gas < solid

29. Particles that most effects material properties

Neutrons

Electrons

Protons

Valence electrons

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

Sulphuric acid

Acetic acid

Chloroform

Acetone

31. The material possessing superconducting properties is

Yb Ba₂Cu₂O₈

Hg Be₂Ca₂Cu₂O₈

Y B₂Cu₃O₇

Y Ba₂Cu₃O₇

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

2 x 6.02 x 10²³

4 x 6.02 x 10²³

6.02 x 10²³

3/2 x 6.02 x 10²³

33. Super conductors are derived from compounds of

p-block elements

Lanthanides

Actinides

Transition elements

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

4800

3200

1524

4400

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

Pentavalent impurity

Tetravalent

Divalent impurity

Trivalent impurity

36. 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

XY₂

XT₃

X₃Y

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

Agl

Cul

HgS

Csl

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

Half that in 8 g of He

Twice that in 60 g carbon

6.022 x 10²²

558.5 x 6.022 x 10²³

39. 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

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

Sodium

Copper

Magneisum

Zinc

41. Which of the following substances is not amorphous?

Glass

Rubber

Ag NO₃

Polymer

42. The crystal structure having face centered cubic arrangement is

NaCl

CsCl

BaCl₂

CuCl

43. Fluted filter paper is used for

To dissolve large amount of substance at its boiling point

To avoid premature crystallization of the solute

Increasing the rate of filtration

Filtering the hot saturated solution

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

100°C and 2.0 atm

0°C and 2.0 atm

-10°C and 5.0 atm

-10°C and 2.0 atm

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

Decrease of surface tension

Increase in potential energy of molecules

Increase of K.E of molecules

Increase of intermolecular interactions

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

CH₄ and AlCl₃

NH₃ and BF₃

H₂O and H⁺

NH₃ and H⁺

47. Isomorphic substance have

Different physical and chemical properties

Same physical and chemical properties

Different physical and same chemical properties

Same physical and difference chemical properties

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

Place the mixture in a separating funnel

Heat the mixture and allow it to cool

Add dilute acid to the mixture and filter

Add water to the mixture and filter

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

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

One mole of NH₃ will produce ½ mole of N₂

One mole of NH₃ will produce 6 moles of N₂

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

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

Causing pressure

Randomly moving

Having wide spaces

Orderly arranged

Page 3 of 6

51. 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:

Three

Two

Four

Five

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

Sugar

Kcl

Plastic

Graphite

53. A malleable solid is one which can be

Converted into sheets

Converted into wires

All of these

Melted easily

54. 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

Isomorphous crystals

Isomeric crystals

Liquid Crystals

Allotropic crystal

55. 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

A and B evaporates at the same rate

B evaporates less readily than C

A evaporates more readily than C

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

Gets a single positive charge

Gets a single negative charge

Gets a double positive charge

Gets a double negative charge

57. Potassium crystallizes with a

Cubic lattice

Triclinic

Orthogonal lattice

Ortho rhombic lattice

58. Mean distance between atoms in the range of

25 nm

0.25 nm

0.025 nm

2.5 nm

59. Which of the following are more temperature sensitive?

None of these

Liquid crystals

Ionic crystals

Solid crystals

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

CuBr

NH₄Br

AgBr

CsBr

61. ‘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?

200

150

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

Fluted filter paper

Normal filter paper

None

Both A & B

63. 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 changed by about 26%

Change by 33%

Is unchanged

Is halved

64. Under what conditions real gases deviate from ideal behavior

High temperature

Both b and c

High pressure

Low temperature

65. 4.4 g of CO₂ contains how many liters of CO₂ at STP?

2.24 liter

22.4 liter

2.4 liter

44 liter

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

3.0115 x 10 ²⁴

2.0478 x 10 ²⁴

4.0956 x 10 ²⁴

1.5057 x 10 ²⁴

67. Which is trigonal crystal?

All

NaNO₃

MgSO₄

CaSO₄.2H₂O

68. 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

O₂

N₂

H₂

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

Electrical attraction

Electrostatic force

Covalent bond

Non covalent bond force

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

Molecular solids

Ionic solids

Covalent solids

Pseudo solids

71. A solid may be made up of

Ions

Molecules

A, B and C

Atoms

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

10 mL of 0.5 M

10 mL of 0.1 M

5 mL of 0.1 M

10 mL of 0.02 M

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

142g

71g

18.75g

35.5g

74. The example of hexagonal system is

Graphite

Sulphur

Diamond

Sugar

75. 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

3 atm

1 atm

2 atm

4 atm

Page 4 of 6

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

Descending paper chromatography

Liquid gas chromatography

Liquid solid chromatography

Ascending paper chromatography

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

Isomorphism

Polymorphism

Amorphism

None of these

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

CrO₂

MnO₂

TiO₂

NO₂

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

Gases do not have a definite shape and volume

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

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

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

80. Ice is ________ crystal

Covalent

Metallic

Ionic

Molecular

81. Repeatable entity of a crystal structure is known as

Miller indices

Crystal

Lattice

Unit cell

82. The mass of one mole of electron is

1.673 mg

0.104 mg

1.008 mg

0.55 mg

83. Crystalline solids can be identified easily by their

Sharp m.P

Transition temperature

Definite geometry

All of these

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

Colour of the gas is greenish yellow

Oxide of the gas is strongly acidic

The gas is chlorine

A gas is liberated

85. Bragg’s law is given by equation

2nλ = d sin θ

nλ = 1/2d sin θ

nλ = 2 d sin θ

nλ = 2 θ sin θ

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

1 liter

2.24 liters

22.4 liters

11.2 liters

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

Boyle’s law

Charles’ law

Graham’s law

Dalton’s law

88. Which is distilled first?

Liquid N₂

Liquid H₂

Liquid O₂

Liquid CO₂

89. 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)

10.33 atm

9.2 atm

9.333 atm

9.74 atm

90. Van der Waal’s forces exist in

All types of atoms and molecules

Polar compounds

Non-polar

Covalent

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

Monoclinic

Rhombic

Tetragonal

Trigonal

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

Pressure of dust particles in air

Non-polar nature of gases

Elastic collisions of gas molecules

Different molar mass

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

AB₂ type ionic compound

NaCl type structure

CsCl type structure

ZnS type structure

94. Isomorphic substances have

Same physical and chemical properties

Different physical and same chemical properties

Same physical and different chemical properties

Different physical and chemical properties

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

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

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

None of these

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

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

20.16

2.016

2.24

22.4

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

CH₄

NH₃

H₂O

BH₃

98. Amorphous substance posses

All of these

No definite heat of fusion

No definite geometry

No sharp melting points

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

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

√P/d

None of these

P/√d

P/d

Page 5 of 6

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

Allotropy

Anisotropy

Polymorphism

Isomorphism

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

1.3 x 10¯²⁰ g

1.4 x 10¯²¹ g

3.72 x 10¯²³ g

5.01 x 10¯²¹ g

103. Amorphous solids

Have sharp melting point

Can possess small regions of orderly arrangement of atoms

Undergo clean cleave when cut with knife

Have perfect arrangement of atoms

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

Triclinic

Monoclinic

Isotropical

Rhombohedral

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

Crystal

None

Cleavage

Unit

106. Half atmospheric pressure is

400 torr

50 662 Pa

8.5 Pounds

101.325 Pa

107. 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

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

He will feel warmth

He will feel cool

His blood pressure will increase

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

790 mm of Hg

100 mm of Hg

1489 mm of Hg

700 mm of Hg

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

Filtration

Sublimation

Condensation

Vaporization

110. Ionic solids are characterized by

Solubility in polar solvents

Low melting points

High vapour pressures

Good conductivity in solid state

111. Which of the following is a pseudo solid?

NaCl

CaF₂

All these

Glass

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

None of these

Bcc

Both fcc and bcc

Fcc

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

High ignition temperature

High concentration

Low temperature

High solubility

114. 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

Remains unchanged

Increase two fold

Be a function of the molecular mass of substance

Decrease twice

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

The carbon atoms are arranged layers

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

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

The coordination number of carbon atoms is 4

116. The most efficient solvent extraction method is by using

Single extraction and small portion of solvent

Repeated extraction and small portion of solvent

Single extraction and large portion of solvent

Repeated extraction and large portion of solvent

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

1.5 moles

3.5 moles

3 moles

10 moles

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

They melt over a range of temperature

They are anisotropic

There is no orderly arrangement of particles

There are rigid and in-compressible

119. Solvent extraction is mostly applied to separate

None of these

Inorganic compounds

Organic compounds

Both A and B

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

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

Decreased covalent and hydrogen bond forces

Increased attraction between the molecules

Decreased volume of the solution

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

Na(g) → N²⁺ (g) + e¯

Na(g) → N²⁺ (g) + +¯

Na(s) → N²⁺ (g) + e¯

Na(s) → N²⁺ (g) + 2e¯

122. Simple molecules or giant macromolecules are examples of

Diatic bond

Metallic bonds

Covalent bonds

Ionic compounds

123. Poor conductors of electricity is a characteristic of

Metallic compounds

Ionic compounds

Covalent compounds

Diatic bonds

124. 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

125. Glass is a

None of these

Gel

Micro-crystalline solid

Super-cooled liquid

Page 6 of 6

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

Slowly

Fast

Moderately

None

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

None of these

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

6 and 6

8 and 4

6 and 4

4 and 4

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

Square planner manner

Altahydral manner

Tetrahedral manner

Hexagonal manner

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

Avogadro’s law

Boyle’s law

Charles’ law

Dalton’s law

131. 50dm³ of CO is burnt completely according to reaction 2CO + O₂ – 2CO₂ Choose the correct statement

Volume of CO₂ formed is 60 dm³

Volume of CO₂ formed is 25 dm³

Volume of O₂ required is 25 dm³

Volume of O₂ required is 50 dm³

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

1.12 dm³

112 cm³

2.24 dm³

22.4 dm³

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

134. 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?

22 g

11 g

33 g

5.5 g

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

136. Which forms metallic crystals?

NH₄Cl

NaCl

SO₂

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

Tetrahedron

Cube

Triangle

Octahedron

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

1/5

1/25

139. How many allotropic forms are present in carbon?

Four

Three

Five

Two

140. Which of the following is isotropic

Borax

Brass

Mercury

Graphite

141. Crystalline solids can be identified easily from their

Transition temperature

Sharp melting point

Definite geometry

Colour

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

0.5 atm, and 500 K

1 atm, and 273 K

15 atm, and 200 K

15 tm, and 500 K

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

None

Same

Double

Half

144. The molar volume of CO₂ is maximum at

127°C and 1 atm

273°C and 2 atm

0°C and 2 atm

S.T.P (0°C and 1 atm)

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

1 : 2

2 : 1

1 : 3

1 : 1

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

8.0

7.0

3.0

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

0.96 g

0.32 g

0.64 g

0.16 g

148. 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 collisions between the gas molecules are increased manifold

A high pressure, the volume of the gas becomes insignificant

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

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

C and F

O and F

N and F

Na and F

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

159 torr

159 g/m³

159 g/Cm²

159 mm Hg.

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Malik TahirLast Updated: October 14, 2025

3 Comments

Rehan Siddique says:

July 30, 2022 at 12:49 pm

It might be a good place for students to learn something new and different

irfan ali says:

May 21, 2022 at 12:22 pm

i am live in kunri pak i give a test for entry test

irfan ali says:

May 21, 2022 at 12:21 pm

i am live in kunri pak

Important Chemistry Solids Question and Answer

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