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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Yasmeen Ashraf 04 - Jun - 2024 06 Min 46 Sec 75/120

ECAT Chemistry Chapter 3 Important MCQ's

Sr.#	Question	Answer
1	Pressure remaining constant, at which temperature volume of gas will become twice of what it is at 0°C ?	A. 546 B. 200 C. 546K D. 273K
2	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.
3	Which of the following is the simplest form of matter?	A. Gaseous state B. Liquid state C. Solid state D. All of above
4	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
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	Boyle's law does not fall even	A. Temperature is extremely high B. Pressure is extremely high C. Mixture of gases is taken D. all of above
7	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
8	In Boyle's law which of the following pair is variable	A. Temperature and quantity of a gas B. Pressure and Volume C. Volume and quantity of a gas D. Pressure and quantity of a gas
9	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
10	In gases and liquids, temperature is the measure of	A. Average translational kinetic energies of molecules B. Average vibrational kinetic energies of molecules C. Average rotational kinetic energies of molecules 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

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

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

Gases show uniform behaviour towards their

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

Keeping the temperature constant, if the gas is expanded

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

Which Statement about gases is not correct?

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

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

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

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

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

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

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

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

The order of the rate of diffusion of gases NH3,SO2, CL2, and CO2 IS :

In gases and liquids, temperature is the measure of

All gases can be compressed by :

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 the gas will be

The intramolecular forces in gases are

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

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

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

The product of pressure and volume remains constant when temperature and quantity of gas is

The rate of diffusion of a gas is :

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ECAT Chemistry Chapter 3 Important MCQ's

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The order of the rate of diffusion of gases NH₃,SO₂, CL₂, and CO₂ IS :