Thermodynamics Test

Result

Thermodynamics Test - 28

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

The efficiency of carnot's engine operating between reservoirs, maintained at temperature 27^o C and ‒123^o C is ............

A
0.5

B
0.4

C
0.6

D
0.25

Solution
Question 2
4 / -1

If a heat engine absorbs 50 KJ heat from a heat source and has efficiency of 40%, then the heat released by it in heat sink is ...........

A
40 KJ

B
30 KJ

C
20 J

D
20 KJ

Solution
Question 3
4 / -1

The efficiency of heat engine is 30% If it gives 30 KJ heat to the heat sink, than it should have absorbed ........... KJ heat from heat source.

A
42.8

B
39

C
29

D
9

Solution
Question 4
4 / -1

If a heat engine absorbs 2 KJ heat from a heat source and release 1.5 KJ heat into cold reservoir, then its efficiency is ...........

A
0.5%

B
75%

C
25%

D
50%

Solution
Question 5
4 / -1

PV diagram of a diatomic gas is a straight line passing through origin. The molar heat capacity of the gas in the process will be

A
4 R

B
3 R

C
4 R/3

D
2.5 R

Solution
Question 6
4 / -1

Heat is supplied to a diatomic gas at constant pressure. The ratio of ∆Q : ∆U : ∆W is

A
5 : 3 : 2

B
7 : 5 : 2

C
2 : 3 : 5

D
2 : 5 : 7

Solution
Question 7
4 / -1

Four spheres A, B, C, and D of different metals but of same radius are kept at same temperature. The ratio of their densities is 2: 3: 5: 1. If specific heats of their materials are in the ratio 3: 6: 2: 4, which sphere will show initially the fastest rate of cooling ?

A
D

B
C

C
B

D
A
Question 8
4 / -1

Volume versus temperature graph of two moles of helium gas is as shown in Fig. The ratio of heat absorbed and work done by the gas in the process 1 – 2 is

A
5/2

B
5/3

C
7/5

D
5/7

Solution
Question 9
4 / -1

Fig. shows two paths for the change of state of a gas from A to B. The ratio of molar heat capacities in paths 1 and 2 is

A
1

B
> 1

C
< 1

D
data is not sufficient

Solution
Question 10
4 / -1

From the following V —T diagram, Fig. What is true about pressure ?

A
P₁ < P₂

B
P₁ > P₂

C
P₁ = P₂

D
cannot predict

Solution