1
WB JEE 2021
+1
-0.25
300 g of water at 25$$^\circ$$C is added to 100 g of ice at 0$$^\circ$$C. The final temperature of the mixture is
A
12.5$$^\circ$$C
B
0$$^\circ$$C
C
25$$^\circ$$C
D
50$$^\circ$$C
2
WB JEE 2020
+1
-0.25
An ideal gas undergoes the cyclic process abca as shown in the given p - V diagram

It rejects 50J of heat during ab and absorbs 80J of heat during ca. During bc, there is no transfer of heat and 40J of work is done by the gas. What should be the area of the closed curved abca?
A
30J
B
40J
C
10J
D
90J
3
WB JEE 2020
+1
-0.25
A container AB in the shape of a rectangular parallelopiped of length 5 m is divided internally by a movable partition P as shown in the figure.

The left compartment is filled with a given mass of an ideal gas of molar mass 32 while the right compartment is filled with an equal mass of another ideal gas of molar mass 18 at same temperature. What will be the distance of P from the left wall A when equilibrium is established?
A
2.5 m
B
1.8 m
C
3.2 m
D
2.1 m
4
WB JEE 2020
+1
-0.25
When 100 g of boiling water at 100$$^\circ$$ C is added into a calorimeter containing 300 g of cold water at 10$$^\circ$$ C, temperature of the mixture becomes 20$$^\circ$$ C. Then, a metallic block of mass 1 kg at 10$$^\circ$$ C is dipped into the mixture in the calorimeter. After reaching thermal equilibrium, the final temperature becomes 19$$^\circ$$ C. What is the specific heat of the metal in CGS unit?
A
0.01
B
0.3
C
0.09
D
0.1
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