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

Cooling happens under the Joule Thomson Effect due to sudden :

Question # 2

Gases show uniform behaviour towards their

Question # 3

The intramolecular forces in gases are

Question # 4

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

Question # 5

Which statement about gases is not correct ?

Question # 6

Boyle's law does not fall even

Question # 7

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

Question # 8

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

Question # 9

All gases can be compressed by

Question # 10

The intramolecular force in gases are :

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

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

Question # 16

In gases and liquids, temperature is the measure of :

Question # 17

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

Question # 18

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

Question # 19

Gases exert pressure on walls of container because the gas molecules

Question # 20

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

Question # 21

The molar value of CO2 is maximum at :

Question # 22

The rate of diffusion of a gas in

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

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

Question # 25

Gases shows uniform behavior toward their :

Question # 26

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

Question # 27

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

Question # 28

In gases and liquids, temperature is the measure of

Question # 29

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

Question # 30

Boyle's law doesn't fail even :

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 A real gas obeying van der Waals' equation will resemble ideal gas if :
A. both 'a' and 'b' are large
B. both 'a' and 'b' are small
C. 'a' is small and 'b' is large
D. 'a' is large and 'b' is small
2

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
3 The movement of gas molecules from a region of high pressure to vacuum is called
A. Evaportation
B. Effusion
C. Conduction
D. Diffusion
4 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
5 The deviation of a gas from ideal behavior is maximum at :
A. -10°C and 5.0 atm
B. -10°C and 2.0 atm
C. 100°C and 2.0 atm
D. 0°C and 2.0 atm
6

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

546

B. 200
C. 546K
D. 273K
7 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
8 In solids, the temperature of is the measure of
A. Rotational kinetic energies
B. transnational kineticenergies
C. Vibrationalkineticenergies
D. None of the above
9 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
10 Gases shows uniform behavior toward their :
A. Internal conditions
B. External conditions
C. Internal and external conditions
D. None of above

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