ECAT Pre Engineering Chemistry Chapter 3 MCQ Test With Answer

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Fatima Tabassum 11 - Jan - 2025 02 Min 30 Sec 115/120
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Shazi Ansari 05 - Jun - 2024 03 Min 12 Sec 75/120
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Eraj Abeer 18 - Dec - 2024 04 Min 19 Sec 75/120
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Yasmeen Ashraf 04 - Jun - 2024 06 Min 46 Sec 75/120

ECAT Chemistry Chapter 3 Important MCQ's

Sr.#	Question	Answer
1	Absolute temperature of a gas is proportional to	A. Rotational kinetic energy B. Translational kinetic energy C. Vibrational kinetic energy D. Potential energy
2	Gases of air always remain in random motion and do not settle due to :	A. Difference in molecular masses of air gases. B. Difference in partial pressure of gas molecules. C. Unequal number of different gas molecules. D. Elastic collision of gas molecules.
3	The relation ships b/w volume of given amount of gas and prevailing conditions of temperature and pressure are :	A. Charles's law B. Graham's law C. Boyle's law D. Gas law
4	The density of a gas is directly proportional to pressure, inversely proportional to temperature and directly proportional to	A. Viscosity B. Molar mass C. Momentum D. All of above
5	All gases can be compressed by :	A. Keeping constant pressure B. Decreasing pressure C. Increasing pressure D. None of the above
6	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.
7	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
8	The molar value of CO₂is maximum at :	A. STP B. 127°C and 1 atm C. 0°C and 2 atm D. 273°C and 2 atm
9	A graph b/w P and 1/V at constant temperature and number of moles is parallel to :	A. None of above B. X-axis C. Z-axis D. Y-axis
10	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

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ECAT Pre Engineering Chemistry Chapter 3 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 3 Gases

ECAT Chemistry Chapter 3 Gases

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

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

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

The rate of diffusion of a gas in

Liquids are less common than

Absolute temperature of a gas is proportional to

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

All gases can be compressed by :

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

Which of the following is the simplest form of matter?

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

Gases show uniform behaviour towards their

Cooling happens under the Joule Thomson Effect due to sudden

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

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

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

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

All gases can be compressed by

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

Cooling happens under the Joule Thomson Effect due to sudden :

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

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

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

Which Statement about gases is not correct?

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

Which statement about gases is not correct ?

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

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

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

Boyle's law doesn't fail even :

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ECAT Chemistry Chapter 3 Important MCQ's

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