1
JEE Main 2024 (Online) 1st February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Choose the correct option for free expansion of an ideal gas under adiabatic condition from the following :
A
$\mathrm{q}=0, \Delta \mathrm{T}=0, \mathrm{w}=0$
B
$\mathrm{q}=0, \Delta \mathrm{T} \neq 0, \mathrm{w}=0$
C
$\mathrm{q} \neq 0, \Delta \mathrm{T}=0, \mathrm{w}=0$
D
$\mathrm{q}=0, \Delta \mathrm{T}<0, \mathrm{w} \neq 0$
2
JEE Main 2024 (Online) 29th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which of the following is not correct?

A
$$\Delta \mathrm{G}$$ is positive for a spontaneous reaction
B
$$\Delta \mathrm{G}$$ is positive for a non-spontaneous reaction
C
$$\Delta \mathrm{G}$$ is zero for a reversible reaction
D
$$\Delta \mathrm{G}$$ is negative for a spontaneous reaction
3
JEE Main 2023 (Online) 13th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

What happens when methane undergoes combustion in systems A and B respectively?

JEE Main 2023 (Online) 13th April Evening Shift Chemistry - Thermodynamics Question 22 English

A
System A System B
Temperature falls Temperature rises
B
System A System B
Temperature rises Temperature remains same
C
System A System B
Temperature falls Temperature remains same
D
System A System B
Temperature remains same Temperature rises
4
JEE Main 2023 (Online) 10th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given

(A) $$\mathrm{2CO(g)+O_2(g)\to 2CO_2(g)}$$ $$\mathrm{\Delta H_1^0=-x~kJ~mol^{-1}}$$
(B) $$\mathrm{C(graphite)+O_2(g)\to CO_2(g)}$$ $$\mathrm{\Delta H_2^0=-y~kJ~mol^{-1}}$$

$$\mathrm{\Delta H^0}$$ for the reaction

$$\mathrm{C(graphite)+\frac{1}{2}O_2(g)\to CO(g)}$$ is :

A
$$\frac{x-2y}{2}$$
B
$$\frac{x+2y}{2}$$
C
$$2y-x$$
D
$$\frac{2x-y}{2}$$
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