ECAT Pre Engineering Chemistry Chapter 3 MCQ Test With Answer

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.#	Question	Answer
1	Gases deviate from ideal behavior at high pressure. Which of the following is correct for non-ideality ?	A. At high pressure, the gas molecules move in one direction only. B. At high pressure, the collisions between the gas molecules are increased manifold. C. At high pressure, the volume of gas becomes insignificant. D. At high pressure, the inter molecular attraction become significant.
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	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
4	Boyle's law doesn't fail even :	A. Temperature is extremely high B. Pressure is extremely high C. Mixture of gas is taken D. All of above
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	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
7	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
8	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
9	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
10	A graph between P and PV at constant temperature and number of mole is parallel to	A. y axis B. z axis C. x axis D. pressure axis

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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 show uniform behaviour towards their

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

Which of the following is the simplest form of matter?

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

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

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

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

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

The rate of diffusion of a gas is :

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

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

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

The intramolecular forces in gases are

In Solids, the temperature is the measure of

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

Absolute temperature of a gas is proportional to

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

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

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

Which statement about gases is not correct ?

In gases and liquids, temperature is the measure of :

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

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

In gases and liquids, temperature is the measure of

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

Which of the following is the simplest form of matter?

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

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

Cooling happens under the Joule Thomson Effect due to sudden

Cooling happens under the Joule Thomson Effect due to sudden :

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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 :