1
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 34 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
2
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
$$\frac{2x-y}{2}$$
3
JEE Main 2023 (Online) 29th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which of the following relations are correct?

(A) $$\mathrm{\Delta U=q+p\Delta V}$$

(B) $$\mathrm{\Delta G=\Delta H-T\Delta S}$$

(C) $$\Delta \mathrm{S}=\frac{q_{rev}}{T}$$

(D) $$\mathrm{\Delta H=\Delta U-\Delta nRT}$$

Choose the most appropriate answer from the options given below :

A
A and B only
B
B and C only
C
C and D only
D
B and D only
4
JEE Main 2022 (Online) 28th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements: One is labelled as Assertion $$\mathbf{A}$$ and the other is labelled as Reason $$\mathbf{R}$$

Assertion A : The reduction of a metal oxide is easier if the metal formed is in liquid state than solid state.

Reason $$\mathbf{R}$$ : The value of $$\Delta G ^\Theta$$ becomes more on negative side as entropy is higher in liquid state than solid state.

In the light of the above statements, choose the most appropriate answer from the options given below

A
Both A and R are correct and R is the correct explanation of A
B
Both A and R are correct but R is NOT the correct explanation of A
C
A is correct but R is not correct
D
A is not correct but R is correct
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