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CHAPTER NO 5

Physical States of Matter

Encircle the most  appropriate answer among the following options


1          Which among the following expand or compressed easily

(a) Liquid

(b) Gases

(c) Solids

(d) Water


2          Diffusion is faster in:

(a) Liquid

(b) Solids

(c) Gases

(d) Plasma


3          Gases exerts pressure in all directions

(a) Uniformly

(b) Randomly

(c) Alternately

(d) Constantly


4          Which principle is applicable in a working pressure cooker?

(a) Boiling point will be more by increasing the external pressure

(b) Boiling point will be less by decreasing the external pressure

(c) Boiling point will be more by increasing the external pressure

(d) None of these


5          Red phosphorus is:

(a) Less reactive

(b) Non-poisonous

(c) Brittle

(d) All of above


6          Which of the following percentage of salt is required to kill the bacteria?

(a) 10%

(b) 20%

(c) 30%

(d) 40%


7          The density of gold is:

(a) 2.70 gcm3

(b) 7.86 gcm3

(c) 9.3 gcm3

(d) 2.98 gcm3


8          The solids in which particles are arranged in definite three-dimensional pattern are known as:

(a) Solids

(b) Crystalline solids

(c) Amorphous solids

(d) both ‘B’ and ‘C’


9          The transition temperature of tin is:

(a) 96°C

(b) 250°C

(c) 18°C

(d) 100°C


10        Oxygen has two allotropic forms:

(a) O2 and O4

(b) O2 and O3

(c) O and O3

(d) O2 and O


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

(a) Crystalline solids

(b) Super cooled liquids

(c) Amorphous solids

(d) Ionic solids


12        The temperature at which the solid and liquid phases of a substance co-exist is known as :

(a) Freezing point

(b) Boiling point

(c) Melting point

(d) Equilibrium


13        The presence of solid in different physical forms is known as:

(a) Crystals

(b) Allotropy

(c) Evaporation

(d) Transition


14        Among the following which depends upon the nature of liquid, intermolecular forces and external pressure.

(a) Melting point

(b) Freezing point

(c) Boiling point

(d) None of these


15        The conversion of a liquid into vapours at all temperature is known as .

(a) Evaporation

(b) Boiling

(c) Cooling process

(d) Both ‘A’ and ‘C’


16        Density is expressed in:

(a) g cm3

(b) g dm3

(c) Both ‘A’ and ‘B’

(d) None of these


17        Charles described, how gases tend to expand when heated:

(a) 1882

(b) 1802

(c) 1820

(d) 1828


18        Mass per unit volume is called:

(a) Pressure

(b) Temperature

(c) Density

(d) Solubility


19        Robert Boyle’s was a natural:

(a) Philosopher

(b) Chemist

(c) Physicist

(d) All of above


20        Matter exists in three physical states:

(a) Solid, liquid, plasma

(b) Solid, water, vapour

(c) Plasma, liquid, solid

(d) Solid, liquid, gas


21        Which one of the following gases diffuse most slowly?

(a) O2

(b) Cl2

(c) NH3

(d) H2


22        Pascal is the SI unit of:

(a) Force

(b) Volume

(c) Momentum

(d) Pressure


23        At 0°C the density of O2 gas is:

(a) 1.5g dm3

(b)1.4g dm3

(c) 4.1g dm3

(d) 0.15g dm-3


24        V/T=K is the mathematical form of: 

(a) Boyle’s law

(b) Charles law

(c) Avogendo law

(d) Dalton law


25        -273°C after conversion to Kelvin scale becomes:

(a) OK

(b) 273K

(c) 173K

(d) 100K


26        At which temperature rate of evaporation of water is minimum?

(a) 50°C

(b) 40°C

(c) 90°C

(d) 70.5°C


27        The molecular formula of decane is

(a) C6H14

(b) C7H16

(c) CaH20

(d) C10H22


28        C6H14 is the molecular formula of

(a) Pentane

(b) Hexane

(c) Propane

(d) Decane


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

(a) C5H12

(b) C6H14

(c) C3H10

(d) C8H18


30        The density of gold is:

(a) 270 gcm

(b) 7.869 cm3

(c) 19.3g cm

(d) 1.4g cm


31        250°C is the transition temperature of which substance:

(a) Tin

(b) Carbon

(c) Phosphorus

(d) Sulphur


32        The crystal structure of which tin is

(a) cubic

(b) tetragonal

(c) monoclinic

(d) None of these


33        Freezing point of acetic acid is:

(a) -116°C

(b) 16.6°C

(c) -56°C

(d) -115°C


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

(a) Water

(b) Alcohol

(c) Honey

(d) Ether


35        2×101325 Pa is equal to

(a) 1.56 atm

(b) 2.0 atm

(c) 15.8 atm

(d) 8.15 atm


36        Normal body temperature is

(a) 98.6°F

(b) 37°C

(c) Both a and b

(d) 98.6°C


37        The freezing point of n-octane is

(a) -57°C

(b) 126°C

(c) 34.6°C

(d)-116°C


38        760 mmHg is equal to

(a) 266 torr

(b) 2660 torr

(c) 626 torr

(d) 1 atm


39        1 atm has how many pascals?

(a) 151987.5 Pa

(b) 19187.5 Pa

(c) 9187.6 Pa

(d) 101325Pa


40        In which unit density of gases is measures?

(a) kg mm-3

(b) cm-3

(c) gdm-3

(d) gcm-3