Physical And Chemical Changes

Chemistry
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Which of the following is not a physical change?

A
Boiling of water to give water vapour
B
Melting of ice to give water
C
Dissolution of salt in water
D
Burning of Liquefied Petroleum Gas (LPG)
Medium
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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
Medium
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