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
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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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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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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	Cooling happens under the Joule Thomson Effect due to sudden :	A. Contraction B. Absortption C. Expansion D. All of above
2	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
3	The order of the rate of diffusion of gases NH₃,SO₂, CL₂, and CO₂ IS :	A. NH_{3 >}SO_{2 >}CL_{2 >}CO₂ B. NH_{3 >}CO_{2 >}SO_{2 >}CL₂ C. CL_{2 >}SO_{2 >}CO_{2 >}NH₃ D. NH_{3 >}CO₂_>CL_{2 >}SO₂
4	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
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	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
7	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.
8	The movement of gas molecules from a region of high pressure to vacuum is called	A. Evaportation B. Effusion C. Conduction D. Diffusion
9	Which of the following is the simplest form of matter?	A. Gaseous state B. Liquid state C. Solid state D. All of above
10	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

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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

Which of the following is the simplest form of matter?

All gases can be compressed by

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

The intramolecular forces in gases are

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

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

Liquids are less common than :

In gases and liquids, temperature is the measure of

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

In gases and liquids, temperature is the measure of :

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

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

Which Statement about gases is not correct?

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

The molar value of CO2 is maximum at :

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

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

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

The rate of diffusion of a gas is :

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

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

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

Keeping the temperature constant, if the gas is expanded

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

A real gas obeying van der Waals' equation will resemble ideal gas if :

All gases can be compressed by :

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

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

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

Boyle's law doesn't fail even :

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ECAT Chemistry Chapter 3 Important MCQ's

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The molar value of CO₂is maximum at :