ECAT Pre Engineering Chemistry Chapter 3 MCQ Test With Answer

Top Scorers Of ECAT Chemistry Chapter 3 Gases MCQ`s Test

A

Abdullah Zubair 17 - Dec - 2024 04 Min 34 Sec 120/120
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Khalida Amjad 23 - Oct - 2024 01 Min 52 Sec 115/120
F

Fatima Tabassum 11 - Jan - 2025 02 Min 30 Sec 115/120
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rehan sanaullah 06 - Jun - 2024 05 Min 12 Sec 105/120
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Muhammad Abubakar 25 - Oct - 2024 14 Min 32 Sec 105/120
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Umar Saeed 21 - Jul - 2024 02 Min 11 Sec 95/120
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kayani 17 - Jul - 2024 07 Min 39 Sec 95/120
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notghouri playz 16 - Dec - 2024 16 Min 23 Sec 95/120
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Mirza Abdullah 11 - Jun - 2024 04 Min 21 Sec 90/120
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Aman Fatima 03 - Jan - 2026 17 Min 21 Sec 88/120
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Laiba Jawad 21 - Sep - 2024 07 Min 29 Sec 80/120
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M Saifullah 02 - Jul - 2024 12 Min 19 Sec 80/120
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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	If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will be	A. Remain unchanged B. Doubled C. Reduced D. Increased four times
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	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
4	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
5	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
6	Cooling happens under the Joule Thomson Effect due to sudden	A. Contraction B. Absorption C. Expansion D. All of above
7	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
8	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
9	Which statement about gases is not correct ?	A. The spread throughout the vessel. B. Pressure is due to collision C. There are large spaces between the molecules. D. molecules are arranged regularly.
10	A graph b/w P and 1/V at constant temperature and number of moles is parallel to :	A. Y-axis B. Z-axis C. X-axis 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 product of pressure and volume remains constant when temperature and quantity of gas is

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

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

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

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

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

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

Boyle's law doesn't fail even :

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

Which Statement about gases is not correct?

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

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

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

Boyle's law is represented as :

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

The intramolecular force in gases are :

Which statement about gases is not correct ?

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

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

Cooling happens under the Joule Thomson Effect due to sudden

Gases exert pressure on walls of container because the gas molecules

All gases can be compressed by

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

Which of the following is the simplest form of matter?

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

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

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

In gases and liquids, temperature is the measure of :

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

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

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ECAT Chemistry Chapter 3 Important MCQ's

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