1

JEE Main 2020 (Online) 2nd September Morning Slot

Numerical

+4

-0

An engine takes in 5 moles of air at 20

^{o}C and 1 atm, and compresses it adiabatically to 1/10^{th}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 V

then allowed to expand isobarically to volume 2V

the final temperature of the gas (in

ideal diatomic gas ($$\gamma $$ = 1.4) is first compressed

adiabatically from volume V

_{1}to V_{2}= $${{{V_1}} \over {16}}$$. It isthen allowed to expand isobarically to volume 2V

_{2}. If all the processes are the quasi-static thenthe final temperature of the gas (in

^{o}K) is (to the nearest integer) _____.Your input ____

3

JEE Main 2020 (Online) 8th January Evening Slot

Numerical

+4

-0

Three containers C

_{1}, C_{2}and C_{3}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 100

^{o}C is mixed with 200 g of ice at its melting point in a thermally insulated container. If it produced liquid water at 40^{o}C [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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