Chapter 5 – Physical States of Matter

Physical States of Matter – MCQ’s

  1. Which of the following expand or compressed easily

(a) Liquid

(b) Gases               ✓

(c) Solids

(d) Water

  1. Diffusion is faster in:

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(a) Liquid

(b) Solids

(c) Gases                      ✓

(d) Plasma

  1. Gases exerts pressure in all directions

(a) Uniformly            ✓

(b) Randomly

(c) Alternately

(d) Constantly

  1. Which principle is used in working pressure cooker?

(a) Boiling point increased by increasing the external pressure

(b) Boiling point decreased by decreasing the external pressure

(c) Boiling point increased by increasing the external pressure    ✓

(d) None of these

  1. Red phosphorus is:

(a) Less reactive

(b) Non-poisonous

(c) Brittle

(d) All of above    ✓

  1. Which percentage of salt is required to kill the bacteria?

(a) 10%

(b) 20%                      ✓

(c) 30%

(d) 40%

  1. The density of gold is:

(a) 2.70 gcm–3

(b) 7.86 gcm–3

(c) 9.3 gcm–3              ✓

(d) 2.98 gcmw–3

  1. The solids in which particles are arranged in definite three-dimensional pattern are called:

(a) Solids

(b) Crystalline solids    ✓

(c) Amorphous solids

(d) both ‘B’ and ‘C’

  1. The transition temperature of tin is:

(a) 96°C

(b) 250°C

(c) 18°C                   ✓

(d) 100°C

  1. Oxygen has two allotropic forms:

(a) O2 and O4

(b) O2 and O3               ✓

(c) O and O3

(d) O2 and O

  1. Plastics, glass rubber, lamp-black etc. are the examples of:

(a) Crystalline solids

(b) Super cooled liquids

(c) Amorphous solids                ✓

(d) Ionic solids

  1. The temperature at which the solid and liquid phases of a substance co-exist:

(a) Freezing point          ✓

(b) Boiling point

(c) Melting point

(d) Equilibrium

  1. The existence of solid in different physical forms is called:

(a) Crystals

(b) Allotropy         ✓

(c) Evaporation

(d) Transition

  1. It depends upon the nature of liquid, intermolecular forces and external pressure.

(a) Melting point

(b) Freezing point

(c) Boiling point        ✓

(d) None of these

  1. The conversion of a liquid into vapours at all temperature is called.

(a) Evaporation            ✓

(b) Boiling

(c) Cooling process

(d) Both ‘A’ and ‘C’

  1. Density is expressed in:

(a) g cm–3

(b) g dm–3

(c) Both ‘A’ and ‘B’       ✓

(d) None of these

  1. Charles described, how gases tend to expand when heated:

(a) 1882

(b) 1802                   ✓

(c) 1820

(d) 1828

  1. Mass per unit volume is called:

(a) Pressure

(b) Temperature

(c) Density                ✓

(d) Solubility

  1. Robert Boyle’s was a natural:

(a) Philosopher

(b) Chemist

(c) Physicist

(d) All of above    ✓

  1. Matter exists in three physical states:

(a) Solid, liquid, plasma

(b) Solid, water, vapour

(c) Plasma, liquid, solid

(d) Solid, liquid, gas    ✓

  1. Which one of the following gases diffuse most slowly?

(a) O2

(b) Cl2    ✓

(c) NH3

(d) H2

  1. Pascal is the SI unit of:

(a) Force

(b) Volume

(c) Momentum

(d) Pressure    ✓

  1. At 0°C the density of O2 gas is:

(a) 1.5g dm-3    ✓

(b) 1.4g dm-3

(c) 4.1g dm-3

(d) 0.15g dm-3

  1. is the mathematical form of:

(a) Boyle’s law

(b) Charles law    ✓

(c) Avogendo law

(d) Dalton law

  1. –273°C after conversion to Kelvin scale becomes:

(a) OK    ✓

(b) 273K

(c) 173K

(d) 100K

  1. At which temperature rate of evaporation of water is minimum?

(a) 50°C

(b) 40°C    ✓

(c) 90°C

(d) 70.5°C

  1. The molecular formula of decane is

(a) C6H14

(b) C7H16

(c) CaH20

(d) C10H22    ✓

  1. C6H14 is the molecular formula of

(a) Pentane

(b) Hexane    ✓

(c) Propane

(d) Decane

  1. At a given temperature which of the following has maximum vapour pressure

(a) C5H12    ✓

(b) C6H14

(c) C7H10

(d) C8H18

  1. The density of gold is:

(a) 270 gcm-3

(b) 7.86g cm-3

(c) 19.3g cm-3    ✓

(d) 1.4g cm-3

  1. 250°C is the transition temperature of which substance:

(a) Tin

(b) Carbon

(c) Phosphorus    ✓

(d) Sulphur

  1. The crystal structure of which tin is

(a) cubic

(b) tetragonal

(c) monoclinic

(d) None of these    ✓

  1. Freezing point of acetic acid is:

(a) –116°C

(b) 16.6°C    ✓

(c) –56°C

(d) –115°C

  1. The vapour pressure of which liquid is 200mm Hg at 0°C?

(a) Water

(b) Alcohol    ✓

(c) Honey

(d) Ether

  1. 2×101325 Pa is equal to

(a) 1.56 atm

(b) 2.0 atm    ✓

(c) 15.8 atm

(d) 8.15 atm

  1. Normal body temperature is

(a) 98.6°F

(b) 37°C

(c) Both a and b    ✓

(d) 98.6°C

  1. The freezing point of n– octane is

(a) –57°C    ✓

(b) 126°C

(c) 34.6°C

(d) –116°C

  1. 760 mmHg is equal to

(a) 266 torr

(b) 2660 torr

(c) 626 torr

(d) 1atm    ✓

  1. 1 atm has how many pascals?

(a) 151987.5 Pa

(b) 19187.5 Pa

(c) 9187.6 Pa

(d) 101325Pa    ✓

  1. In which unit density of gases is measures?

(a) kg mm-3

(b) cm-3

(c) gdm-3    ✓

(d) gcm-3

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