Question

A change in the physical state can be brought about *

1 point

(a) only when energy is given to the system

(b) only when energy is taken out from the systeme

(c) when energy is either given to or taken out from the system

(d) without any energy change

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Answer 1

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.