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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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	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
2	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
3	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
4	The intramolecular force in gases are :	A. Weak B. Normal C. Very weak D. Strong
5	The rate of diffusion of a gas in	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
6	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
7	The highest temperature at which a substance can exist as a liquid is called its	A. Critical temperature B. Zero temperature C. Absolute temperature D. None of above
8	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
9	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.
10	Which of the following is the simplest form of matter?	A. Gaseous state B. Liquid state C. Solid state D. All 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

Gases exert pressure on walls of container because the gas molecules

Cooling happens under the Joule Thomson Effect due to sudden :

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

Absolute temperature of a gas is proportional to

Keeping the temperature constant, if the gas is expanded

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

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

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

The rate of diffusion of a gas in

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

In gases and liquids, temperature is the measure of

In gases and liquids, temperature is the measure of :

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

Which statement about gases is not correct ?

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

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

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

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

Which Statement about gases is not correct?

Cooling happens under the Joule Thomson Effect due to sudden

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

Gases show uniform behaviour towards their

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

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 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 is represented as :

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

Liquids are less common than

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ECAT Chemistry Chapter 3 Important MCQ's

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