First slide

Gaseous state

Question

I, II, III are three isotherms respectively at $T_{1}, T_{2} and T_{3} .$ . Temperature will be in order

Moderate

A

$T_{1} = T_{2} = T_{3}$
B

$T_{1} < T_{2} < T_{3}$
C

$T_{1} > T_{2} > T_{3}$
D

$T_{1} > T_{2} = T_{3}$

Solution

At constant pressure (parallel to V-axis) $V_{1} > V_{2} > V_{3}$ .
Since, $V \propto T, hence T_{1} > T_{2} > T_{3} .$ .

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