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

Gases exert pressure on walls of container because the gas molecules :

Question # 2

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

Question # 3

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

Question # 4

Cooling happens under the Joule Thomson Effect due to sudden

Question # 5

The highest temperature at which a substance can exist as a liquid is called its

Question # 6

The density of a gas is directly proportional to pressure, inversely proportional to temperature and directly proportional to

Question # 7

Gases exert pressure on walls of container because the gas molecules

Question # 8

Which statement about gases is not correct ?

Question # 9

Gases show uniform behaviour towards their

Question # 10

Which of the following is the simplest form of matter?

Question # 11

Liquids are less common than :

Question # 12

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

Question # 13

Gases shows uniform behavior toward their :

Question # 14

Boyle's law doesn't fail even :

Question # 15

All gases can be compressed by

Question # 16

The ratio of volume to temperature on Kelvin scale is constant according to

Question # 17

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

Question # 18

Which of the following is the simplest form of matter?

Question # 19

Liquids are less common than

Question # 20

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

Question # 21

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

Question # 22

The deviation of a gas from ideal behavior is maximum at :

Question # 23

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

Question # 24

The molar value of CO2 is maximum at :

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

Pressure remaining constant, at which temperature volume of gas will become twice of what it is at 0°C ?

Question # 29

The density of a gas is directly and volume at constant temperature for a gas is

Question # 30

Boyle's law does not fall even

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 Cooling happens under the Joule Thomson Effect due to sudden
A. Contraction
B. Absorption
C. Expansion
D. All of above
2 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.
3 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
4 The density of a gas is directly and volume at constant temperature for a gas is
A. Isobaric
B. Isothermal
C. Isotherm
D. None of above
5 The movement of gas molecules from a region of high pressure to vacuum is called
A. Evaportation
B. Effusion
C. Conduction
D. Diffusion
6 According to Boyle's law. which parameters give a straight line parallel to x-axis, when we plot a graph between
A. V and T
B. P and V
C. P and 1/V
D. P and PV
7 In gases and liquids, temperature is the measure of :
A. Average transnational kinetic energies of molecules.
B. Average vibrational kinetic energies of molecules.
C. Average rotational kinetic energies of molecules.
D. None of above
8 Cooling happens under the Joule Thomson Effect due to sudden :
A. Contraction
B. Absortption
C. Expansion
D. All of above
9 In Boyle's law which of the following pair remains constant :
A. Temperature and quality of a gas.
B. Pressure and quality of a gas.
C. Temperature and pressure
D. Temperature and quantity of a gas.
10 Boyle's law doesn't fail even :
A. Temperature is extremely high
B. Pressure is extremely high
C. Mixture of gas is taken
D. All of above

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