ECAT Pre Engineering Chemistry Chapter 3 MCQ Test With Answer

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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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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	All gases can be compressed by :	A. Keeping constant pressure B. Decreasing pressure C. Increasing pressure D. None of the above
2	The movement of gas molecules from a region of high pressure to vacuum is called	A. Evaportation B. Effusion C. Conduction D. Diffusion
3	Cooling happens under the Joule Thomson Effect due to sudden	A. Contraction B. Absorption C. Expansion D. All of above
4	Which of the following will have the same number of molecules at STP ?	A. 280 CM³ of CO² and 280 CM³ of N₂O B. 11.2 dm3 of O₂ and 32 g of O₂ C. 44 g of CO₂ and 11.2 dm³ of CO D. 28 g of N2 and 5.6 dm³ of oxygen
5	In Boyle's law which of the following pair remains constant :	A. Temperature and quality of a gas. B. Pressure and quality of a gas. C. Temperature and pressure D. Temperature and quantity of a gas.
6	In Boyle's law which of the following pair remains constant	A. Temperature and quality of a gas B. Pressure and quality of a gas C. Temperature and pressure D. Temperature and quantity of a gas
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	For a gas obeying Boyle's law if pressure is doubled, the volume becomes :	A. Remain constant B. Double C. One half D. None of above
9	The intramolecular forces in gases are	A. Weak B. Normal C. Very weak D. Strong
10	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

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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

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

Cooling happens under the Joule Thomson Effect due to sudden

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

All gases can be compressed by

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

Gases shows uniform behavior toward their :

Boyle's law is represented as :

In gases and liquids, temperature is the measure of

All gases can be compressed by :

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

Gases show uniform behaviour towards their

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 :

Which statement about gases is not correct ?

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

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

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

Which Statement about gases is not correct?

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

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

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

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

Liquids are less common than :

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

The rate of diffusion of a gas in

The rate of diffusion of a gas is :

Keeping the temperature constant, if the gas is expanded

Liquids are less common than

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