Question

Assertion (A) : According to the principle of conservation of energy all heat can be converted
into mechanical work
Reason (R) : Due to various losses, it is impossible to convert all heat into mechanical work.

• A. Both Assertion and Reason are true and reason is correct explanation of Assertion.
• B. Both Assertion and Reason are true but reason is not correct explanation of Assertion
• C. Assertion is true but reason is false
• D. Both assertion and reason are false

Answer 1

Answer: (B)

Both Assertion and Reason are true but reason is not correct explanation of Assertion

According to the law of conservation of energy, energy can neither be created nor it can be destroyed. Thus, it is physically possible to convert all of heat into mechanical work. But due to various energy losses, this cannot be achieved practically ever.