1
JEE Main 2022 (Online) 27th June Evening Shift
Numerical
+4
-1 When 5 moles of He gas expand isothermally and reversibly at 300 K from 10 litre to 20 litre, the magnitude of the maximum work obtained is __________ J. [nearest integer] (Given : R = 8.3 J K$$-$$1 mol$$-$$1 and log 2 = 0.3010)

2
JEE Main 2022 (Online) 26th June Evening Shift
Numerical
+4
-1 A fish swimming in water body when taken out from the water body is covered with a film of water of weight 36 g. When it is subjected to cooking at 100$$^\circ$$C, then the internal energy for vaporization in kJ mol$$-$$1 is ___________. [nearest integer]

[Assume steam to be an ideal gas. Given $$\Delta$$vapH$$^\Theta$$ for water at 373 K and 1 bar is 41.1 kJ mol$$-$$1 ; R = 8.31 J K$$-$$1 mol$$-$$1]

3
JEE Main 2022 (Online) 26th June Morning Shift
Numerical
+4
-1 For complete combustion of methanol

CH3OH(I) + $${3 \over 2}$$O2(g) $$\to$$ CO2(g) + 2H2O(I)

the amount of heat produced as measured by bomb calorimeter is 726 kJ mol$$-$$1 at 27$$^\circ$$C. The enthalpy of combustion for the reaction is $$-$$x kJ mol$$-$$1, where x is ___________. (Nearest integer)

(Given : R = 8.3 JK$$-$$1 mol$$-$$1)

4
JEE Main 2022 (Online) 26th June Morning Shift
Numerical
+4
-1 2.0 g of H2 gas is adsorbed on 2.5 g of platinum powder at 300 K and 1 bar pressure. The volume of the gas adsorbed per gram of the adsorbent is __________ mL.

(Given : R = 0.083 L bar K$$-$$1 mol$$-$$1)

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