Question

A substance on heating, undergoes a rise in its temperature, then

• A. average kinetic energy of molecules increases
• B. average potential energy of molecules increases
• C. average lattice energy of molecules increases
• D. All of the above
  

Answer 1

The correct option is A average kinetic energy of molecules increases

As the temperature of the substance increases, the Kinetic Energy of the molecule increased and they start doing random movements that's called Brownian motion.