1
JEE Main 2020 (Online) 4th September Morning Slot
Numerical
+4
-0
A closed vessel contains 0.1 mole of a monoatomic ideal gas at 200 K. If 0.05 mole of the same gas at 400 K is added to it, the final equilibrium temperature (in K) of the gas in the vessel will be close to _______.
2
JEE Main 2020 (Online) 3rd September Evening Slot
Numerical
+4
-0
If minimum possible work is done by a refrigerator in converting 100 grams of water at 0oC to ice, how much heat (in calories) is released to the surroundings at temperature 27oC (Latent heat of ice = 80 Cal/gram) to the nearest integer ?
3
JEE Main 2020 (Online) 3rd September Morning Slot
Numerical
+4
-0
A bakelite beaker has volume capacity of 500 cc at 30oC. When it is partially filled with Vm volume (at 30oC) of mercury, it is found that the unfilled volume of the beaker remains constant as temperature is varied. If $$\gamma$$(beaker) = 6 × 10–6 oC–1 and $$\gamma$$(mercury) = 1.5 × 10–4 oC–1, where $$\gamma$$ is the coefficient of volume expansion, then Vm (in cc) is close to ____.
4
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________.
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