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MDCAT Chemistry Liquids and Solids Test Online

Malik TahirLast Updated: May 24, 2025

Chemistry Solids MCQS Online Test

MDCAT Chemistry Solids Chapter Online Test

Total Questions:	150
Time Allowed:	60 Minutes
Total Marks:	150
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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MDCAT Chemistry Solids Test

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Page 1 of 6

Chemistry

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

Elastic collisions of gas molecules

Different molar mass

Pressure of dust particles in air

Non-polar nature of gases

2. The example of hexagonal system is

Graphite

Sulphur

Diamond

Sugar

3. Which of the following is a pseudo solid?

Glass

CaF₂

All these

NaCl

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

CO is 3.75 times faster than CO₂

Both diffused at the same time

CO₂ is 1.25 times faster than CO

CO is 1.25 times faster than CO₂

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

Trivalent impurity

Pentavalent impurity

Tetravalent

Divalent impurity

6. How many allotropic forms are present in carbon?

Four

Two

Five

Three

7. Glass is a

Gel

Super-cooled liquid

None of these

Micro-crystalline solid

8. 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

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

Unit

None

Crystal

Cleavage

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

10 moles

1.5 moles

3 moles

3.5 moles

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

3/2 x 6.02 x 10²³

6.02 x 10²³

2 x 6.02 x 10²³

4 x 6.02 x 10²³

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

HgS

Csl

Cul

Agl

13. Potassium crystallizes with a

Ortho rhombic lattice

Cubic lattice

Triclinic

Orthogonal lattice

14. Which of the following has least mass?

3 x 10²³ atoms of C

2 gram atom of nitrogen

1 mole of S

7.0 g of Ag.

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

Monoclinic

Tetragonal

Rhombic

Trigonal

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

71g

35.5g

142g

18.75g

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

Molecular solids

Covalent solids

Pseudo solids

Ionic solids

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

2.0478 x 10 ²⁴

1.5057 x 10 ²⁴

3.0115 x 10 ²⁴

4.0956 x 10 ²⁴

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

Covalent bond

Electrostatic force

Electrical attraction

Non covalent bond force

20. Super conductors are derived from compounds of

Actinides

p-block elements

Lanthanides

Transition elements

21. Particles that most effects material properties

Valence electrons

Electrons

Neutrons

Protons

22. Crystals can be classified into

7 crystal systems

4 crystal systems

14 crystal systems

3 crystal systems

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

1 : 2

1 : 1

2 : 1

1 : 3

24. Half atmospheric pressure is

101.325 Pa

8.5 Pounds

400 torr

50 662 Pa

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

They are anisotropic

There are rigid and in-compressible

They melt over a range of temperature

There is no orderly arrangement of particles

Page 2 of 6

26. In case of elements the polymorphism is called

Crystalline forms

Isotopic form

Isomorphism

Allotropy

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

AB₂ type ionic compound

NaCl type structure

CsCl type structure

ZnS type structure

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

15 tm, and 500 K

1 atm, and 273 K

0.5 atm, and 500 K

15 atm, and 200 K

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

Anions

Ione pair of electrons

Free valence electrons

Cations

30. Which of the following substances is not amorphous?

Glass

Rubber

Ag NO₃

Polymer

31. Poor conductors of electricity is a characteristic of

Ionic compounds

Metallic compounds

Covalent compounds

Diatic bonds

32. Solvents of covalent compounds include all but

Petrol

Tetra chloromethane

Water

Alcohol

33. Under what conditions real gases deviate from ideal behavior

High temperature

High pressure

Low temperature

Both b and c

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

Double

Same

Half

None

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

2/√π

π/2

2/π

√π/2

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

790 mm of Hg

1489 mm of Hg

700 mm of Hg

100 mm of Hg

37. Which forms metallic crystals?

NaCl

SO₂

NH₄Cl

38. Isomorphic substance have

Different physical and same chemical properties

Different physical and chemical properties

Same physical and difference chemical properties

Same physical and chemical properties

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

Kcl

Graphite

Plastic

Sugar

40. 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

2 atm

4 atm

1 atm

3 atm

41. 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

N₂

O₂

H₂

42. The crystal structure having face centered cubic arrangement is

NaCl

CsCl

CuCl

BaCl₂

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

Filtration

Condensation

Vaporization

Sublimation

44. Amorphous solids

Undergo clean cleave when cut with knife

Have perfect arrangement of atoms

Have sharp melting point

Can possess small regions of orderly arrangement of atoms

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

Sulphuric acid

Chloroform

Acetic acid

Acetone

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

-10°C and 2.0 atm

-10°C and 5.0 atm

0°C and 2.0 atm

100°C and 2.0 atm

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

Gets a double negative charge

Gets a single negative charge

Gets a double positive charge

Gets a single positive charge

48. Mean distance between atoms in the range of

0.25 nm

25 nm

0.025 nm

2.5 nm

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

Zinc

Copper

Sodium

Magneisum

50. Formation of a cation is?

Redox

Oxidation

None

Reduction

Page 3 of 6

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

Na and F

O and F

N and F

C and F

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

Allotropy

Polymorphism

Isomorphism

Anisotropy

53. 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

2.24 liters

1 liter

22.4 liters

54. The allotropic forms of an element are called

Allotropes

Isoelectronic

Unit Cell

Cleavage

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

1.4 x 10¯²¹ g

3.72 x 10¯²³ g

5.01 x 10¯²¹ g

1.3 x 10¯²⁰ g

56. Which solids are called true solids?

Metallic

Crystalline

Vitreous

Amorphous

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

6.022 x 10²²

558.5 x 6.022 x 10²³

Half that in 8 g of He

Twice that in 60 g carbon

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

TiO₂

CrO₂

NO₂

MnO₂

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

Triclinic

Rhombohedral

Monoclinic

Isotropical

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

Solvent extraction

Crystallization

All

Chromatography

61. 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

62. Ice is ________ crystal

Metallic

Molecular

Ionic

Covalent

63. ‘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

64. Which of the following are more temperature sensitive?

Liquid crystals

None of these

Ionic crystals

Solid crystals

65. 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:

Two

Four

Three

Five

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

All molecular collisions are elastic

Molecules are in chaotic motion

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

67. 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 cool

He will feel warmth

His blood pressure will increase

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

1524

3200

4400

4800

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

Randomly moving

Having wide spaces

Orderly arranged

Causing pressure

70. Bragg’s law is given by equation

nλ = 2 θ sin θ

nλ = 2 d sin θ

nλ = 1/2d sin θ

2nλ = d sin θ

71. 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 O₂ required is 50 dm³

Volume of CO₂ formed is 25 dm³

Volume of O₂ required is 25 dm³

72. Repeatable entity of a crystal structure is known as

Miller indices

Crystal

Unit cell

Lattice

73. Isomorphic substances have

Different physical and chemical properties

Same physical and different chemical properties

Same physical and chemical properties

Different physical and same chemical properties

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

75. Simple molecules or giant macromolecules are examples of

Diatic bond

Ionic compounds

Covalent bonds

Metallic bonds

Page 4 of 6

76. 4.4 g of CO₂ contains how many liters of CO₂ at STP?

44 liter

22.4 liter

2.4 liter

2.24 liter

77. 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

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

Trigonal

Triclimic

Monoclimic

Mexagonal

79. Solvent extraction is mostly applied to separate

Both A and B

None of these

Inorganic compounds

Organic compounds

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

159 g/m³

159 g/Cm²

159 torr

159 mm Hg.

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

Ammonia

Water

Ethanol

Ether

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

This gives medium size crystals

Filtrate runs down without crystals

The filtrate is quick

This gives bigger size crystals

83. Which is trigonal crystal?

MgSO₄

CaSO₄.2H₂O

All

NaNO₃

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

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

One mole of NH₃ will produce 6 moles of N₂

85. The mass of one mole of electron is

0.104 mg

1.673 mg

1.008 mg

0.55 mg

86. Ionic solids are characterized by

High vapour pressures

Solubility in polar solvents

Good conductivity in solid state

Low melting points

87. 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

0 K

546 °C

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

3 liter atm

2 liter atm

Zero

1 liter atm

89. Crystalline solids can be identified easily from their

Definite geometry

Sharp melting point

Transition temperature

Colour

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

CsBr

AgBr

CuBr

NH₄Br

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

0.32 g

0.16 g

0.96 g

0.64 g

92. Crystalline solids can be identified easily by their

Sharp m.P

All of these

Transition temperature

Definite geometry

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

Mass

Charge

Relative abundance

Number of isotopes

94. A malleable solid is one which can be

Converted into sheets

Melted easily

All of these

Converted into wires

95. Isotopes differ in

Properties which depend upon mass

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

Arrangement of electrons in orbitals

Chemical properties

96. The molar volume of CO₂ is maximum at

S.T.P (0°C and 1 atm)

127°C and 1 atm

0°C and 2 atm

273°C and 2 atm

97. 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

Isomeric crystals

Liquid Crystals

Isomorphous crystals

Allotropic crystal

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

Altahydral manner

Square planner manner

Hexagonal manner

Tetrahedral manner

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

Dalton’s law

Charles’ law

Graham’s law

Boyle’s law

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

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

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

Gases do not have a definite shape and volume

Page 5 of 6

101. 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

Be a function of the molecular mass of substance

Decrease twice

Increase two fold

102. 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

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

A high pressure, the volume of the gas becomes insignificant

103. 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

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

6 and 4

4 and 4

8 and 4

6 and 6

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

Moderately

Slowly

Fast

None

106. 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

Descending paper chromatography

Ascending paper chromatography

107. Amorphous substances possess

Sharp melting points

No definite heat of fusion

Sharp B.P.

Definite heat of fusion

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

The gas is chlorine

Oxide of the gas is strongly acidic

Colour of the gas is greenish yellow

A gas is liberated

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

2.24

22.4

2.016

20.16

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

22.4 dm³

1.12 dm³

2.24 dm³

112 cm³

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

Cube

Octahedron

Triangle

Tetrahedron

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

Bcc

Both fcc and bcc

None of these

Fcc

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

6 moles of S

5.0 moles of SO₂

20 moles of S8

44.8 dm3 CO₂ at S.T.P

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

115. 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?

11 g

22 g

5.5 g

33 g

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

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

None of these

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

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

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

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

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

None of these

120. Triple point of water is

203 K

193 K

273 K

373 K

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

High concentration

High solubility

Low temperature

High ignition temperature

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

Avogadro’s law

Boyle’s law

Dalton’s law

Charles’ law

123. Amorphous substance posses

No definite geometry

No definite heat of fusion

No sharp melting points

All of these

124. Van der Waal’s forces exist in

Non-polar

Polar compounds

All types of atoms and molecules

Covalent

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

0.2 M

0.05 M

0.25 M

0.1 M

Page 6 of 6

126. Which of the following is isotropic

Mercury

Brass

Graphite

Borax

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

Na(g) → N²⁺ (g) + +¯

Na(s) → N²⁺ (g) + e¯

Na(g) → N²⁺ (g) + e¯

Na(s) → N²⁺ (g) + 2e¯

128. 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

Little bit greater than the molar volumes of liquid

About the same as the molar volumes of liquids

Much larger than the molar volumes of liquids and solids

129. 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

130. The material possessing superconducting properties is

Yb Ba₂Cu₂O₈

Y Ba₂Cu₃O₇

Hg Be₂Ca₂Cu₂O₈

Y B₂Cu₃O₇

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

A evaporates more readily than C

A and B evaporates at the same rate

B evaporates less readily than C

B evaporates more readily than A

132. 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

Change by 33%

Is halved

Is unchanged

Is changed by about 26%

133. Correct order of intermolecular forces

Liquid < gas < solid

Gas < liquid < solid

Gas = liquid = solid

Gas < liquid < solid

134. 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 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

135. Fluted filter paper is used for

Filtering the hot saturated solution

To avoid premature crystallization of the solute

To dissolve large amount of substance at its boiling point

Increasing the rate of filtration

136. 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 0.1 M

5 mL of 0.1 M

10 mL of 0.5 M

10 mL of 0.02 M

137. Which is distilled first?

Liquid O₂

Liquid CO₂

Liquid H₂

Liquid N₂

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

CH₄

NH₃

BH₃

H₂O

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

Normal filter paper

None

Both A & B

Fluted filter paper

140. 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

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

√P/d

None of these

P/√d

P/d

142. A solid may be made up of

Atoms

Ions

Molecules

A, B and C

143. 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 dynes Cm K¯¹ mol¯¹

8.31 JK¯¹ mol¯¹

8.31 x 10⁷ erg³ K¯¹ mol¯¹

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

Decreased covalent and hydrogen bond forces

Increased attraction between the molecules

Decreased volume of the solution

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

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

C₆H₁₀O₄

C₄H₁₀O₂

C₃H₅O₂

C₃H₁₀O₂

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

NH₃ and H⁺

CH₄ and AlCl₃

NH₃ and BF₃

H₂O and H⁺

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

Increase in potential energy of molecules

Increase of K.E of molecules

Increase of intermolecular interactions

Decrease of surface tension

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

None of these

Polymorphism

Isomorphism

Amorphism

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

7.0

8.0

3.0

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

Isomorphism

Anisotropy

Polymorphism

Allotropy

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Malik TahirLast Updated: May 24, 2025

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3 Comments

Rehan Siddique says:

July 30, 2022 at 12:49 pm

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May 21, 2022 at 12:22 pm

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irfan ali says:

May 21, 2022 at 12:21 pm

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