Question

Which of the following is a physical change
(a) rusting of iron
(b) combustion of magnesium
(c) Burning of candle
(d) Melting of wax

Answer 1

d) is the correct answer as in it the wax melts and converts from the solid state into liquid day due to which is only a physical change .
a) rusting of iron is both physical as well as chemical change as in rusting of iron is changes as chemical composition as well as it changes physical nature from silver is colour to a brownish colour of iron
please Mark me as brainliest I beg you my friend and believe me it's absolutely right .

Answer 2

Among these Rusting of iron, cooking of food, Burning of a candle are chemical changes.