ECAT Pre Engineering Chemistry Chapter 3 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 3 Gases

Try The MCQ's Test For ECAT Chemistry Chapter 3 Gases

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ECAT Chemistry Chapter 3 Gases

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Question # 1

For a gas obeying Boyle's law if pressure is doubled, the volume becomes :

Question # 2

Which of the following will have the same number of molecules at STP ?

Question # 3

A graph b/w P and 1/V at constant temperature and number of moles is parallel to :

Question # 4

All gases can be compressed by

Question # 5

A graph between P and PV at constant temperature and number of mole is parallel to

Question # 6

For a gas obeying Boyle's law if pressure is doubled, the volume becomes

Question # 7

Number of molecules in one dm3 of water is close to :

Question # 8

Boyle's law is represented as :

Question # 9

The graph between pressure and volume at constant temperature for a gas is

Question # 10

Liquids are less common than :

Question # 11

In Boyle's law which of the following pair remains constant :

Question # 12

In Boyle's law which of the following pair remains constant

Question # 13

How should condition be changed to prevent the volume of a given gas from expanding whine its mass is increased ?

Question # 14

The relationships between volume of a given amount of gas and the prevailing conditions of temperature and pressure are

Question # 15

Gases of air always remain in random motion and do not settle due to :

Question # 16

If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will be

Question # 17

The product of pressure and volume remains constant when temperature and quantity of gas is

Question # 18

Which Statement about gases is not correct?

Question # 19

According to Boyle's law, which parameters give a straight line parallel to axis-s, when we plot a graph between:

Question # 20

The molar value of CO2 is maximum at :

Question # 21

All gases can be compressed by :

Question # 22

Liquids are less common than

Question # 23

At constant temperature when pressure of a gas is plotted against volume, the curve is

Question # 24

The relation ships b/w volume of given amount of gas and prevailing conditions of temperature and pressure are :

Question # 25

In solids, the temperature of is the measure of

Question # 26

The intramolecular force in gases are :

Question # 27

Absolute temperature of a gas is proportional to

Question # 28

Equal masses of methane and oxygen are mixed in an empty container at 25°CThe fraction of total pressure exerted by oxygen is :

Question # 29

If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of gas will :

Question # 30

In gases and liquids, temperature is the measure of

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 Gases deviate from ideal behavior at high pressure. Which of the following is correct for non-ideality ?
A. At high pressure, the gas molecules move in one direction only.
B. At high pressure, the collisions between the gas molecules are increased manifold.
C. At high pressure, the volume of gas becomes insignificant.
D. At high pressure, the inter molecular attraction become significant.
2 Keeping the temperature constant, if the gas is expanded
A. kinetic energy of molecules will increase
B. Number of gas molecules increases
C. Temperature will increases
D. Pressure will decrease
3 According to Boyle's law, which parameters give a straight line parallel to axis-s, when we plot a graph between:
A. V and T
B. P and V
C. P and 1/V
D. P and PV
4 In Boyle's law which of the following pair is variable
A. Temperature and quantity of a gas
B. Pressure and Volume
C. Volume and quantity of a gas
D. Pressure and quantity of a gas
5 Which of the following is the simplest form of matter?
A. Gaseous state
B. Liquid State
C. Solid State
D. All of above
6 A graph between P and 1/V at constant temperature and number moles of a gas meets the
A. y-axis
B. x-axis
C. origin
D. none of above
7 Liquids are less common than
A. Solids
B. Plasmas
C. Gases
D. All of above
8 Cooling happens under the Joule Thomson Effect due to sudden
A. Contraction
B. Absorption
C. Expansion
D. All of above
9 The movement of molecules from a region of high pressure to vacuum is called :
A. Evaporation
B. Effusion
C. Conduction
D. Difusion
10 Gases exert pressure on walls of container because the gas molecules
A. Obey gas laws
B. Have definite volume
C. Collide with the walls of container
D. Collide with each other

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