Thermodynamics Test

Result

Thermodynamics Test - 31

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Weekly Quiz Competition

Question 1
4 / -1

ΔU + ΔW = 0 is valid for

A
Adiabatic process

B
Isothermal process

C
Isobaric process

D
Isochoric process
Question 2
4 / -1

Air is filled in a motor tube at 27° C and at a pressure of 8 atmospheres. The tube suddenly bursts, then temperature of air is [Given γ of air = 1.5]

A
27.5° C

B
75° K

C
150° K

D
150° C

Solution
Question 3
4 / -1

One mole of an ideal gas with γ = 1.4, is adiabatically compressed so that its temperature rises from 27°C to 35°C. The change in the internal energy of the gas is (R = 8.3 J mol.K)

A
–166 J

B
166 J

C
–168 J

D
168 J

Solution
Question 4
4 / -1

A gas for which γ = 1.5 is suddenly compressed to 1/4th of the initial volume. Then the ratio of the final to the initial pressure is

A
1 : 16

B
1 : 8

C
1 : 4

D
8 : 1

Solution
Question 5
4 / -1

The internal energy of the gas increases in

A
Adiabatic expansion

B
Adiabatic compression

C
Isothermal expansion

D
Isothermal compression
Question 6
4 / -1

A gas expands under constant pressure P from volume V₁ to V₂ . The work done by the gas is

A
P(V₂ – V₁)

B
P(V₁ – V₂)

C

D
Question 7
4 / -1

Work done by 0.1 mole of a gas at 27°C to double its volume at constant pressure is (R = 2 cal mol^–1° C^–1)

A
54 cal

B
600 cal

C
60 cal

D
546 cal

Solution
Question 8
4 / -1

If 300 ml of a gas at 27°C is cooled to 7°C at constant pressure, then its final volume will be

A
540 ml

B
350 ml

C
280 ml

D
135 ml

Solution
Question 9
4 / -1

In which thermodynamic process, volume remains same ?

A
Isobaric

B
Isothermal

C
Adiabatic

D
Isochoric
Question 10
4 / -1

In an isochoric process if T₁ = 27° C and T₂ = 127° C, then P₁/ P₂ will be equal to

A
9/59

B
2/3

C
3/4

D
None of these

Solution