1
JEE Advanced 2026 Paper 1 Online
MCQ (Single Correct Answer)
+3
-1

An ideal gas (0.5 mol), initially at 2 bar pressure, is compressed at a constant temperature of 600 K in two steps: first, against a constant external pressure of P bar (2 < P < 8), and then against constant external pressure of 8 bar. At each step, the compression is stopped only when the pressure of the gas becomes equal to the external pressure. The total work done on the gas in these steps is W. Considering all possible values of P (2 < P < 8) and taking the gas constant as R (in J K−1 mol−1), the minimum value of |W| (in J) is

A

207R

B

600R

C

630R

D

900R

2
JEE Advanced 2026 Paper 1 Online
MCQ (Single Correct Answer)
+4
-1

List-I contains various physical/chemical processes, and List-II contains combinations of changes in enthalpy ($\Delta H$) and entropy ($\Delta S$). Match each entry in List-I to the appropriate entry in List-II, and choose the correct option.

List-I List-II
(P) Physisorption (1) $$\Delta H > 0 \text{ and } \Delta S > 0$$
(Q) Diamond $\rightarrow$ Graphite (2) $$\Delta H < 0 \text{ and } \Delta S < 0$$
(R) Denaturation of protein (3) $$\Delta H < 0 \text{ and } \Delta S = 0$$
(S) Propene $\rightarrow$ Cyclopropane (4) $$\Delta H > 0 \text{ and } \Delta S < 0$$
(5) $$\Delta H < 0 \text{ and } \Delta S > 0$$
A

P → 2; Q → 3; R → 5; S → 4

B

P → 4; Q → 3; R → 5; S → 1

C

P → 2; Q → 5; R → 1; S → 4

D

P → 2; Q → 5; R → 1; S → 3

3
JEE Advanced 2017 Paper 2 Offline
MCQ (Single Correct Answer)
+3
-0.75
Change Language
The standard state Gibbs free energies of formation of $$C$$(graphite) and $$C$$(diamond) at $$T=298$$ $$K$$ are

$${\Delta _f}{G^0}$$ [$$C$$(graphite)] $$ = 0kJmo{l^{ - 1}}$$

$${\Delta _f}{G^0}$$ [$$C$$(diamond)] $$ = 2.9kJmo{l^{ - 1}}$$

The standard state means that the pressure should be $$1$$ bar, and substance should be pure at a given temperature. The conversion of graphite [$$C$$(graphite)] to diamond [$$C$$(diamond)] reduces its volume by $$2 \times {10^{ - 6}}\,{m^3}\,mo{l^{ - 1}}$$ If $$C$$(graphite) is converted to $$C$$(diamond) isothermally at $$T=298$$ $$K,$$ the pressure at which $$C$$(graphite) is in equilibrium with $$C$$(diamond), is

[Useful information : $$1$$ $$J=1$$ $$kg\,{m^2}{s^{ - 2}};1\,Pa = 1\,kg\,{m^{ - 1}}{s^{ - 2}};$$ $$1$$ bar $$ = {10^5}$$ $$Pa$$]
A
$$14501$$ bar
B
$$58001$$ $$bar$$
C
$$1450$$ bar
D
$$29001$$ bar
4
JEE Advanced 2016 Paper 1 Offline
MCQ (Single Correct Answer)
+3
-1
Change Language
One mole of an ideal gas at 300 K in thermal contact with surroundings expands isothermally from 1.0 L to 2.0 L against a constant pressure of 3.0 atm. In this process, the change in entropy of surrounding ($$\Delta$$Ssurr)in JK–1 is (1L atm = 101.3 J)
A
5.763
B
1.013
C
– 1.013
D
– 5.763

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