1
JEE Main 2020 (Online) 2nd September Morning Slot
Numerical
+4
-0
An engine takes in 5 moles of air at 20oC and
1 atm, and compresses it adiabatically to
1/10th of the original volume. Assuming air to
be a diatomic ideal gas made up of rigid
molecules, the change in its internal energy
during this process comes out to be X kJ. The
value of X to the nearest integer is________.
Your input ____
2
JEE Main 2020 (Online) 9th January Evening Slot
Numerical
+4
-0
Starting at temperature 300 K, one mole of an
ideal diatomic gas ($$\gamma $$ = 1.4) is first compressed
adiabatically from volume V1 to V2 = $${{{V_1}} \over {16}}$$. It is
then allowed to expand isobarically to volume 2V2. If all the processes are the quasi-static then
the final temperature of the gas (in oK) is (to the nearest integer) _____.
ideal diatomic gas ($$\gamma $$ = 1.4) is first compressed
adiabatically from volume V1 to V2 = $${{{V_1}} \over {16}}$$. It is
then allowed to expand isobarically to volume 2V2. If all the processes are the quasi-static then
the final temperature of the gas (in oK) is (to the nearest integer) _____.
Your input ____
3
JEE Main 2020 (Online) 8th January Evening Slot
Numerical
+4
-0
Three containers C1, C2 and C3 have water at
different temperatures. The table below shows
the final temperature T when different amounts
of water (given in litres) are taken from each
containers and mixed (assume no loss of heat
during the process)
The value of $$\theta $$ (in °C to the nearest integer) is ..........

Your input ____
4
JEE Main 2020 (Online) 7th January Evening Slot
Numerical
+4
-0
M grams of steam at 100oC is mixed with 200 g of ice at its melting point in a thermally insulated
container. If it produced liquid water at 40oC [heat of vaporization of water is 540 cal/g and heat
of fusion of ice is 80 cal/g] the value of M is ____
Your input ____
Questions Asked from Heat and Thermodynamics (Numerical)
Number in Brackets after Paper Indicates
No. of Questions
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