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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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	Number of molecules in one dm³of water is close to :	A. 6.02/22.4 B. 12.04/22.4 10²³ C. 18/22.410²³ D. 55.66.0210²³* 10²³
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	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
5	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
6	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.
7	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
8	The relation ships b/w volume of given amount of gas and prevailing conditions of temperature and pressure are :	A. Charles's law B. Graham's law C. Boyle's law D. Gas law
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 graph between pressure 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

Cooling happens under the Joule Thomson Effect due to sudden :

Gases show uniform behaviour towards their

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

The intramolecular force in gases are :

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

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

In gases and liquids, temperature is the measure of

Which statement about gases is not correct ?

Boyle's law does not fall even

Which of the following is the simplest form of matter?

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

Boyle's law is represented as :

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

Gases shows uniform behavior toward their :

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

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

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 :

In solids, the temperature of is the measure of

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

Which of the following is the simplest form of matter?

All gases can be compressed by :

Boyle's law doesn't fail even :

The intramolecular forces in gases are

A graph between P and PV at constant temperature and number of mole is parallel to

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

Liquids are less common than :

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

The molar value of CO2 is maximum at :

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Top Scorers Of ECAT Chemistry Chapter 3 Gases MCQ`s Test

ECAT Chemistry Chapter 3 Important MCQ's

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Number of molecules in one dm³of water is close to :

The molar value of CO₂is maximum at :