1

JEE Main 2019 (Online) 10th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

A process has $$\Delta $$H = 200 J mol

^{–1}and $$\Delta $$S = 40 JK^{–1}mol^{–1}. Out of the values given below, choose the minimum temperature above which the process will be spontaneous :2

JEE Main 2019 (Online) 9th January Evening Slot

MCQ (Single Correct Answer)

+4

-1

The entropy change associated with the conversion of 1 kg of ice at 273 K to water vapours at 383 K is :

(Specific heat of water liquid and water vapour are 4.2 kJ K

(Specific heat of water liquid and water vapour are 4.2 kJ K

^{$$-$$1}kg^{$$-$$1}and 2.0 kJ K^{$$-$$1}kg^{$$-$$1}; heat of liquid fusion and vapourisation of water are 334 kJ^{$$-$$1}and 2491 kJ kg^{$$-$$1}, respectively). (log 273 = 2.436, log 373 = 2.572, log 383 = 2.583)3

JEE Main 2019 (Online) 9th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

Consider the reversible isothermal expansion of an ideal gas in a closed system at two different temperatures T

_{1}and T_{2}(T_{1}< T_{2}). The correct graphical depiction of the dependence of work done (w) on the final volume (V) is :4

JEE Main 2018 (Online) 16th April Morning Slot

MCQ (Single Correct Answer)

+4

-1

At 320 K, a gas A

_{2}is 20% dissociated to A(g). The standard free energy change at 320 K and 1 atm in J mol^{-1}is approximately : (R = 8.314 JK^{-1}mol^{-1}; ln2 = 0.693; ln 3 = 1.098)Questions Asked from Thermodynamics (MCQ (Single Correct Answer))

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