ECAT Pre Engineering Chemistry Chapter 3 MCQ Test With Answer

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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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AS creations 16 - Jun - 2026 07 Min 11 Sec 96/120
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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

ECAT Chemistry Chapter 3 Important MCQ's

Sr.#	Question	Answer
1	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
2	At constant temperature when pressure of a gas is plotted against volume, the curve is	A. Slanting straight line B. Parabolic C. Staight line, parallel to pressure axis D. OF neither type
3	The rate of diffusion of a gas is :	A. Inversely proportional to its density B. Inversely proportional to square root of its molecular mass C. Directly proportional to molecular mass D. Directly proportional to its density
4	The product of pressure and volume remains constant when temperature and quantity of gas is	A. zero B. variable C. kept constant D. None of these
5	In solids, the temperature of is the measure of	A. Rotational kinetic energies B. transnational kineticenergies C. Vibrationalkineticenergies D. None of the above
6	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
7	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.
8	All gases can be compressed by	A. Keeping constant pressure B. Decreasing pressure C. Increasing pressure D. None of above
9	Cooling happens under the Joule Thomson Effect due to sudden	A. Contraction B. Absorption C. Expansion D. All of above
10	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

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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

Gases exert pressure on walls of container because the gas molecules

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

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

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

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

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

The rate of diffusion of a gas is :

Liquids are less common than :

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

Which statement about gases is not correct ?

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

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

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

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

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

All gases can be compressed by

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

Boyle's law does not fall even

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

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

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

Absolute temperature of a gas is proportional to

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

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 intramolecular forces in gases are

In gases and liquids, temperature is the measure of

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

Gases show uniform behaviour towards their

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

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