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

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

Question # 2

The rate of diffusion of a gas in

Question # 3

The movement of gas molecules from a region of high pressure to vacuum is called

Question # 4

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

Question # 5

The molar value of CO2 is maximum at :

Question # 6

Liquids are less common than :

Question # 7

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

Question # 8

In Boyle's law which of the following pair is variable

Question # 9

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

Question # 10

The movement of molecules from a region of high pressure to vacuum is called :

Question # 11

The order of the rate of diffusion of gases NH3,SO2, CL2, and CO2 IS :

Question # 12

Cooling happens under the Joule Thomson Effect due to sudden :

Question # 13

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

Question # 14

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

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

Gases deviate from ideal behavior at high pressure. Which of the following is correct for non-ideality ?

Question # 19

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

Question # 20

In gases and liquids, temperature is the measure of :

Question # 21

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

Question # 22

Which statement about gases is not correct ?

Question # 23

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

Question # 24

In Solids, the temperature is the measure of

Question # 25

A graph between P and 1/V at constant temperature and number moles of a gas meets the

Question # 26

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

Question # 27

Boyle's law doesn't fail even :

Question # 28

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

Question # 29

Which of the following is the simplest form of matter?

Question # 30

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

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 Equal masses of methane and oxygen are mixed in an empty container at 25°CThe fraction of total pressure exerted by oxygen is :
A. 1/2
B. 8/9
C. 1/9
D. 16/17
2 If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of gas will :
A. remain unchanged
B. increase four times
C. reduce to 1/4
D. be doubled
3

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

6.02/22.4


B.

12.04/22.4 *1023


C.

18/22.4*1023

D.

55.6*6.02*1023 * 1023
4 A graph between P and PV at constant temperature and number of mole is parallel to
A. y axis
B. z axis
C. x axis
D. pressure axis
5 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.
6 Liquids are less common than :
A. Solids
B. Plasmas
C. Gases
D. All of above
7 Absolute temperature of a gas is proportional to
A. Rotational kinetic energy
B. Translational kinetic energy
C. Vibrational kinetic energy
D. Potential energy
8 For a gas obeying Boyle's law if pressure is doubled, the volume becomes
A. Remains constant
B. Double
C. One half
D. None of above
9 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.
10 In Solids, the temperature is the measure of
A. Rotational kinetic energies
B. Translational kinetic energies
C. Vibrational kinetic energies
D. None of above

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    ahsan

    20 Jul 2019

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