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Question (1)

QN0038317

If one mole of monoatomic gas is mixed with one mole of diatomic gas , the value of for the mixture is

(A)
1.40
(B)
1.50
(C)
1.53
(D)
3.07

Correct Answer: B

Explanation:

or

.

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Question (2)

QN0038318

The specific heat of a gas

(A)
has only two values and
(B)
has a unique value at a given temperature
(C)
can have any value between 0 and
(D)
depends upon the mass of the gas

Correct Answer: C

Explanation:

; If and if , then

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Question (3)

QN0038319

The specific heats at constant pressure is greater than that of the same gas at constant volume because

(A)
at constant pressure work is done in expanding the gas
(B)
at constant volume work is done in expanding the gas
(C)
the molecular attraction increases more at constant pressure
(D)
the molecular vibration increases more at constant pressure

Correct Answer: A

Explanation:

Work done is to be done in expanding the gas at constant pressure.

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Question (4)

QN0038320

One mole of a gas occupies 22.4 lit at N.T.P. calculate the difference between two molar specific heats of the gas

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

Correct Answer: A

Explanation:

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Question (5)

QN0038321

For a gas, difference between two specific heats is . If the ratio of specific heat is 1.6 , the two specific heats are in

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

Correct Answer: C

Explanation:

Given

From Equation (i) & (ii),

Hence

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Question (6)

QN0038322

The molar specific heats of an ideal gas at constant pressure and volume are denoted by and , respectively. If and is the universal gas constant, then is equal to

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

Correct Answer: A

Explanation:

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Question (7)

QN0038323

A gaseous mixture consists of of helium and of oxygen. The ratio of the mixture is

(A)
1.62
(B)
1.59
(C)
1.54
(D)
1.4

Correct Answer: A

Explanation:

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Question (8)

QN0038324

The value of is for a gas sample in state is in state . Let denote the pressure and denote the temperature of states and respectively, then

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

Correct Answer: A

Explanation:

For an ideal gas

If

then gas will be real gas. Thus pressure is high and temperatue is low for real gas.

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Question (9)

QN0038325

The total internal energy of one mole of rigid diatomic gas is

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

Correct Answer: C

Explanation:

A rigid diatomic molecule has 5 degrees of freedom total internal energy of one mole of rigid diatomic gas is

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Question (10)

QN0038326

For hydrogen gas and for oxygen gas . So, the relation between and is given by

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

Correct Answer: D

Explanation:

Both are diatomic gases and for all gases.

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Question (1)

If one mole of monoatomic gas is mixed with one mole of diatomic gas , the value of for the mixture is

Explanation:

Link:

Question (2)

The specific heat of a gas

Explanation:

Link:

Question (3)

The specific heats at constant pressure is greater than that of the same gas at constant volume because

Explanation:

Link:

Question (4)

One mole of a gas occupies 22.4 lit at N.T.P. calculate the difference between two molar specific heats of the gas

Explanation:

Link:

Question (5)

For a gas, difference between two specific heats is . If the ratio of specific heat is 1.6 , the two specific heats are in

Explanation:

Link:

Question (6)

The molar specific heats of an ideal gas at constant pressure and volume are denoted by and , respectively. If and is the universal gas constant, then is equal to

Explanation:

Link:

Question (7)

A gaseous mixture consists of of helium and of oxygen. The ratio of the mixture is

Explanation:

Link:

Question (8)

The value of is for a gas sample in state is in state . Let denote the pressure and denote the temperature of states and respectively, then

Explanation:

Link:

Question (9)

The total internal energy of one mole of rigid diatomic gas is

Explanation:

Link:

Question (10)

For hydrogen gas and for oxygen gas . So, the relation between and is given by

Explanation:

Link:

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