Question

The temperature of an object is observed to rise in a period. In this period
(i) heat is certainly supplied to it.
(ii) heat is certainly not supplied to it.
(iii) heat may have been supplied to it.
(iv) work may have been done on it.

• A. $\left(ii\right),\left(iii\right)$
• B. $\left(iii\right),\left(iv\right)$
• C. $\left(i\right),\left(iii\right)$
• D. $\left(i\right),\left(iv\right)$

Answer 1

The correct option is B $\left(iii\right),\left(iv\right)$

$PV=nRT$
Increase in $T$ implies atleast one of $P$ or $V$ increases. Hence, work may have been done.
Or we can say temperature increases in isochoric process as well as in isobaric process.
Heat is energy in transit and when we supply heat to a body, we can increase its temperature.
A given amount of work would generate same amount of heat in ideal case.

FINAL ANSWER: (c)