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Question (21)

QN0038417

The pressure inside a tyre is 4 times that of atmosphere. If the tyre bursts suddenly at temperature , what will be the new temperature?

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

Correct Answer: D

Explanation:

Under adiabatic change

or

for air

or

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Question (22)

QN0038418

We consider a thermodynamic system. If represents the increase in its internal energy and the work done by the system, which of the following statements is true?

(A)
in an adiabatic process
(B)
in an isothermal process
(C)
in an isothermal process
(D)
in an adiabatic process

Correct Answer: A

Explanation:

From first law of thermodynamics,

In adiabatic process

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Question (23)

QN0038419

Which of the following is the curve for isothermal and adiabatic process of an ideal gas?

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

Correct Answer: C

Explanation:

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Question (24)

QN0038420

One mole of an ideal gas at an initial temperature of does joules of work adiabatically. If the ratio of specific heats of this gas at constant pressure and at constant volume is , the final temperature of gas will be

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

Correct Answer: A

Explanation:

joules,

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Question (25)

QN0038421

Calculate the work done when 1 mole of a perfect gas is compressed adiabatically. The initial pressure and volume of the gas are and 6 litre respectively. The final volume of the gas is 2 litres. Molar specific heat of the gas at constant volume is . [Given ]

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

Correct Answer: A

Explanation:

For an adiabatic change constant

As molar specific heat of gas at constant volume

From eq .(1)

Work done

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Question (26)

QN0038422

The diagram of a diatomic ideal gas system going under cyclic process as shown in figure. The work done during an adiabatic process is :

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

Correct Answer: A

Explanation:

Work done during adiabatic process ,

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Question (27)

QN0038423

On coordinates, the slope of an isothermal curve of a gas at a pressure and volume is equal to . If , the slope of the adiabatic curve passing through this point is :

(A)
(B)
(C)
(D)
None of these

Correct Answer: C

Explanation:

Slope of adiabatic curve

slope of isothermal curve

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Question (28)

QN0038424

Which of the following holds good for an isochoric process?

(A)
No work is done on the gas
(B)
No work is done by the gas
(C)
Both (a) and (b)
(D)
None of these

Correct Answer: C

Explanation:

In an isochoric process, no work is done on or by the gas. is constant.

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Question (29)

QN0038425

For an ideal gas graph is shown for three processes. Process 1,2 and 3 are respectively.

(A)
Isobaric, adiabatic, isochoric
(B)
Adiabatic, isobaric, isochoric
(C)
Isochoric, adiabatic, isobaric
(D)
Isochoric, isobaric, adiabatic

Correct Answer: D

Explanation:

Isochoric proceess

proceess 1

Isobaric : .

Adiabatic

As workdone in case of adiabatic process is more so process 3 is adiabatic and process 2 is isobaric.

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Question (30)

QN0038426

of oxygen gas is heated so as to raise its temperature from 20 to . If the heating is done at
constant pressure, the external work done by the gas is and )

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

Correct Answer: B

Explanation:

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Question (21)

The pressure inside a tyre is 4 times that of atmosphere. If the tyre bursts suddenly at temperature , what will be the new temperature?

Explanation:

Link:

Question (22)

We consider a thermodynamic system. If represents the increase in its internal energy and the work done by the system, which of the following statements is true?

Explanation:

Link:

Question (23)

Which of the following is the curve for isothermal and adiabatic process of an ideal gas?

Explanation:

Link:

Question (24)

One mole of an ideal gas at an initial temperature of does joules of work adiabatically. If the ratio of specific heats of this gas at constant pressure and at constant volume is , the final temperature of gas will be

Explanation:

Link:

Question (25)

Calculate the work done when 1 mole of a perfect gas is compressed adiabatically. The initial pressure and volume of the gas are and 6 litre respectively. The final volume of the gas is 2 litres. Molar specific heat of the gas at constant volume is . [Given ]

Explanation:

Link:

Question (26)

The diagram of a diatomic ideal gas system going under cyclic process as shown in figure. The work done during an adiabatic process is :

Explanation:

Link:

Question (27)

On coordinates, the slope of an isothermal curve of a gas at a pressure and volume is equal to . If , the slope of the adiabatic curve passing through this point is :

Explanation:

Link:

Question (28)

Which of the following holds good for an isochoric process?

Explanation:

Link:

Question (29)

For an ideal gas graph is shown for three processes. Process 1,2 and 3 are respectively.

Explanation:

Link:

Question (30)

of oxygen gas is heated so as to raise its temperature from 20 to . If the heating is done at constant pressure, the external work done by the gas is and )

Explanation:

Link:

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of oxygen gas is heated so as to raise its temperature from 20 to . If the heating is done at
constant pressure, the external work done by the gas is and )