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 in, or taken out from
the system
(D) without any energy change give right anwer​

Answer 1

Answer:

C option

Explanation:

As heat is also form of energy then,

State change when heat is given .i.e fusion,and vapourisation,hence solid to liquid to gas

And when heat is taken out i.e. Condensation hence liquid to solid

Hope this helps u

Answer 2

Answer:

(C)

Explanation: A change in the physical state can be brought about when energy is either given to, or taken out from the system. It is because, energy change helps in changing the magnitude of attraction forces between the particles, thus helps in changing the physical states (j.e., solid, liquid, gas) of matter.