1
WB JEE 2018
+1
-0.25
The water equivalent of a calorimeter is 10 g and it contains 50 g of water at 15$$^\circ$$C. Some amount of ice, initially at $$-$$ 10$$^\circ$$C is dropped in it and half of the ice melts till equilibrium is reached. What was the initial amount of ice that was dropped (when specific heat of ice = 0.5 cal gm$$-$$1 $$^\circ$$C$$-$$1, specific heat of water = 10 cal gm$$-$$1 $$^\circ$$C$$-$$1 and latent heat of melting of ice = 80 cal gm$$-$$1) ?
A
10 g
B
18 g
C
20 g
D
30 g
2
WB JEE 2018
+1
-0.25
One mole of a monoatomic ideal gas undergoes a quasistatic process, which is depicted by a straight line joining points $$({V_0},{T_0})$$ and $$({2V_0},{3T_0})$$ in a V-T diagram. What is the value of the heat capacity of the gas at the point $$({V_0},{T_0})$$?
A
R
B
$${3 \over 2}R$$
C
2R
D
0
3
WB JEE 2018
+1
-0.25
For an ideal gas with initial pressure and volume pi and Vi respectively, a reversible isothermal expansion happens, when its volume becomes V0. Then, it is compressed to its original volume Vi by a reversible adiabatic process. If the final pressure is pf, then which of the following statement(s) is/are true?
A
pf = pi
B
pf > pi
C
pf < pi
D
$${{{p_f}} \over {{V_0}}}\, = \,{{{p_i}} \over {{V_i}}}$$
4
WB JEE 2017
+1
-0.25
Temperature of an ideal gas, initially at 27$$^\circ$$C, is raised by 6$$^\circ$$C. The rms velocity of the gas molecules will
A
increase by nearly 2%
B
decrease by nearly 2%
C
increase by nearly 1%
D
decrease by nearly 1%
EXAM MAP
Medical
NEET