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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Muhammad Abubakar 25 - Oct - 2024 14 Min 32 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 movement of gas molecules from a region of high pressure to vacuum is called	A. Evaportation B. Effusion C. Conduction D. Diffusion
2	How should condition be changed to prevent the volume of a given gas from expanding whine its mass is increased ?	A. Temperature is lowered and pressure is increased B. Temperature is increasedand pressure is lowered C. Temperature and pressure both are lowered D. Temperature and pressure both are increased
3	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
4	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
5	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
6	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
7	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
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	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
10	Gases shows uniform behavior toward their :	A. Internal conditions B. External conditions C. Internal and external conditions 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

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

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

Cooling happens under the Joule Thomson Effect due to sudden

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

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

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

Liquids are less common than

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

Keeping the temperature constant, if the gas is expanded

Gases shows uniform behavior toward their :

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

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

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

Number of molecules in one dm3 of water is close to :

In solids, the temperature of is the measure of

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 :

Absolute temperature of a gas is proportional to

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

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

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

Boyle's law does not fall even

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

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

Which Statement about gases is not correct?

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

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

In Solids, the temperature is the measure of

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

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ECAT Chemistry Chapter 3 Important MCQ's

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Number of molecules in one dm³of water is close to :