Question

A change in the physical state can be brought about:

A

only when energy is given to the system

B

only when energy is taken out from the system

C

when energy is either given to, or taken out from the system

D

without any energy change

Easy

Solution

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Correct option is C)

If a reaction undergoing a change in physical state, energy is either taken out from the system (exothermic) or given to the system (endothermic). 

Therefore, the correct option is ().

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