Question

The temperature of an object is observed to rise in a period. In this period :

• A. heat is certainly supplied to the system
• B. heat is certainly not supplied to the system
• C. heat may have been supplied to the system
• D. work may have been done on the system

Answer 1

Answer: (C), (D)

The correct options are
C heat may have been supplied to the system
D work may have been done on the system

The temperature of the system is observed to rise when heat may have been supplied to the system and/ or work may have been done on the system. As energy is given to system changes are seen in form of changes in system temperature.