Question

1. Which of the following is a physical change?
(a) Rusting of iron
(b) Combustion of magnesium ribbon
(C) Burning of candle
(d) Melting of wax


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Answer 1

melting of wax

Melting of wax is temporary and wax can settle again on cooling and turns into a solid. Hence, the change is only physical and the state of matter changes.