Thermodynamics Test

Result

Thermodynamics Test - 33

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Weekly Quiz Competition

Question 1
4 / -1

The ratio of its final volume to initial volume will be

A
1/2

B
More than 1/2

C
Less than 1/2

D
Between 1 and 2

Solution
Question 2
4 / -1

A gas expands with temperature according to the relation V = kT^2/3. What is the done when the temperature changes by 30°C

A
10 R

B
20 R

C
30 R

D
40 R

Solution
Question 3
4 / -1

A gas undergoes a change of state during which 100 J of heat is supplied to it and it does 20 J of work. The system is brought back to its original state through a process during which 20J of heat is released by the gas. The work done by the gas in the second process is

A
60 J

B
40 J

C
80 J

D
20 J

Solution
Question 4
4 / -1

One mole of monoatomic ideal gas is taken along two cyclic processes E → F → G → E and E → F → H → E as shown in the p-V diagram. The processes involved are purely isochoric, isobaric, isothermal or adiabatic. Match the paths in List I with the magnitudes of the work done in List II and select the correct answer using the codes given below the lists.

A
P = 4, Q = 3, R = 2, S = 1

B
P = 4, Q = 3, R = 1, S = 2

C
P = 3, Q = 1, R = 2, S = 4

D
P = 1, Q = 3, R = 2, S = 4

Solution
Question 5
4 / -1

A centigrade and a Fahrenheit thermometer are dipped in boiling water. Thewater temperature is lowered until the Fahrenheit thermometer registers 140^o. What is the fall in temperature registered by centigrade thermometer?

A
30^o

B
60^o

C
40^o

D
80^o

Solution
Question 6
4 / -1

The apparent coefficient of expansion of a liquid when heated in a copper vesselis C, and when heated in a silver vessel is S. If A is linear coefficient of expansionof copper, then the linear coefficient of expansion of silver is

A

B

C

D

Solution
Question 7
4 / -1

Equal masses of two liquids A and B contained in vessels of negligible heatcapacity are supplied heat at the same rate. The temp. time graphs for the two liquids are shown in Fig. If S represents sp. Heat and L represents latent heat of liquid, then

A
S_A > S_B; L_A < L_B

B
S_A > S_B; L_A > L_B

C
S_A < S_B; L_A < L_B

D
S_A < S_B; L_A > L_B
Question 8
4 / -1

A gas is expanded from volume V₀ to 2V₀ under three different processes. Process 1 is isobaric process, process 2 is isothermal and process 3 is adiabatic. Let ΔU₁, ΔU₂ and ΔU₃ be the change in internal energy of the gas in these three processes. Then

A
ΔU₁ > ΔU₂ > ΔU₃

B
ΔU₁ < ΔU₂ < ΔU₃

C
ΔU₂ < ΔU₁ < ΔU₃

D
ΔU₂ < ΔU₃ < ΔU₁
Question 9
4 / -1

Fig. shows two processes a and b for a given sample of a gas. If ∆Q₁, ∆Q₂ are the amounts of heat absorbed by the system in the two cases; and ∆U₁, ∆U₂ are changes in internal energies respectively, then.

A
∆Q₁ = ∆Q₂ ; ∆U₁ = ∆U₂

B
∆Q₁ > ∆Q₂ ; ∆U₁ > ∆U₂

C
∆Q₁ < ∆Q₂ ; ∆U₁ < ∆U₂

D
∆Q₁ > ∆Q₂ ; ∆U₁ = ∆U₂
Question 10
4 / -1

In the indicator diagram, Fig., T_a, T_b, T_c, T_d represent temps of gas at A, B, C, D respectively. Which of the following is correct relation?

A
T_a = T_b = T_c = T_d

B
T_a ≠ T_b ≠ T_c ≠ T_d

C
T_a = T_b and T_c = T_d

D
none of these