Question

Assertion: V-t graph for gas at constant pressure is a straight line passing through origin (t-temperature in Celsius)

Reason: volume is directly proportional to temperature (kelvin) at constant pressure.

• A. Both assertion (A) and reason (R) are correct and R gives the correct explanation
• B. Both assertion (A) and reason (R) are correct but R doesnt give the correct explanation
• C. A is true but R is false
• D. A is false but R is true

Answer 1

The correct option is D A is false but R is true

At t=0, $T$ is actually 273 K and volume and pressure are not zero at this point therefore,
V-t curve is a straight line at constant pressure but it does not passes through origin when t is in celsius.
Therefore assertion is wrong
Reason is true at constant pressure.