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Question (11)

QN0035812

Which of the following graphs represent the behavior of an ideal gas ? Symbols have their usual meaning.

(A)
(B)
(C)
(D)

Correct Answer: C

Explanation:

From the ideal gas equation,

Therefore, v/s T graph is straight line.

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Question (12)

QN0035813

A gas in a container is in thermal equilibrium with antoher gas of the same mass in container . If we denote the corresponding pressures and volumes by the suffixes and , then which of the following statement is most likely to be true?

(A)
(B)
(C)
(D)

Correct Answer: D

Explanation:

Apply Boyle's law, at constant temperature

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Question (13)

QN0035814

A vessel contains of hydrogen and of oxygen at standard temperature and pressure. The volume of the vessel in is :

(A)
(B)
(C)
(D)

Correct Answer: C

Explanation:

Number of moles

At STP, 1 moles occupy

So, 12 moles occupy

i.e.

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Question (14)

QN0035815

A vessel has of hydrogen at pressure and temperature . A small hole is made in it so that hydrogen leaks out. How much hydrogen leaks out if the final pressure is and temperature falls to ?

(A)
(B)
(C)
(D)

Correct Answer: D

Explanation:

Initially,

Finally, (if gas leaks out)

Hence, gram

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Question (15)

QN0035816

A mixture of hydrogen and oxygen has volume , temperature , pressure and mass . The ratio of number of moles of hydrogen to number of moles of oxygen in the mixture will be :

(A)
(B)
(C)
(D)

Correct Answer: B

Explanation:

By ideal gas equation

So,

as,

Substracting (i) from (ii), we get

So,

Therefore,

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Question (16)

QN0035817

A balloon contains of helium at and 4 atmospheric pressure. The volume of helium at temperature and 2 atmospheric pressure will,

(A)
(B)
(C)
(D)

Correct Answer: D

Explanation:

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Question (17)

QN0035818

A perfect gas at is heated at constant pressure so as to double its volume. The final temperature of the gas will be, close to

(A)
(B)
(C)
(D)

Correct Answer: A

Explanation:

Given,

From charle's law

or,

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Question (18)

QN0035819

A mixture of hydrogen and oxygen has volume , temperature , pressure and mass . The ratio of masses of oxygen to hydrogen will be :-

(A)
(B)
(C)
(D)

Correct Answer: C

Explanation:

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Question (19)

QN0035820

Ratio of volume occupied by a gas of mass at two different pressure and if temperature remains constant is

(A)
(B)
(C)
(D)

Correct Answer: B

Explanation:

Boyle's Law states for constant .

So,

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Question (20)

QN0035821

respectively denote pressure, volume and temperature of two gases. On mixing, new temperature and volume are respectively and . Final pressure of the mixture is

(A)
(B)
(C)
zero
(D)

Correct Answer: B

Explanation:

Let and be the number of moles of each gas. Then and .

When the two gases are mixed, total number of moles,

(where is the pressure of the mixture.)

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Question (11)

Which of the following graphs represent the behavior of an ideal gas ? Symbols have their usual meaning.

Explanation:

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Question (12)

A gas in a container is in thermal equilibrium with antoher gas of the same mass in container . If we denote the corresponding pressures and volumes by the suffixes and , then which of the following statement is most likely to be true?

Explanation:

Link:

Question (13)

A vessel contains of hydrogen and of oxygen at standard temperature and pressure. The volume of the vessel in is :

Explanation:

Link:

Question (14)

A vessel has of hydrogen at pressure and temperature . A small hole is made in it so that hydrogen leaks out. How much hydrogen leaks out if the final pressure is and temperature falls to ?

Explanation:

Link:

Question (15)

A mixture of hydrogen and oxygen has volume , temperature , pressure and mass . The ratio of number of moles of hydrogen to number of moles of oxygen in the mixture will be :

Explanation:

Link:

Question (16)

A balloon contains of helium at and 4 atmospheric pressure. The volume of helium at temperature and 2 atmospheric pressure will,

Explanation:

Link:

Question (17)

A perfect gas at is heated at constant pressure so as to double its volume. The final temperature of the gas will be, close to

Explanation:

Link:

Question (18)

A mixture of hydrogen and oxygen has volume , temperature , pressure and mass . The ratio of masses of oxygen to hydrogen will be :-

Explanation:

Link:

Question (19)

Ratio of volume occupied by a gas of mass at two different pressure and if temperature remains constant is

Explanation:

Link:

Question (20)

respectively denote pressure, volume and temperature of two gases. On mixing, new temperature and volume are respectively and . Final pressure of the mixture is

Explanation:

Link:

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