Question

can you please answer the question

Answer 1

7. burning of candle is chemical change as in the burning process CO2 is released and can't be reversed while melting of wax is physical change as no new substance is formed and is reversible

Answer 2

It is a chemical change since the wax vapour burns and produces a new subsatance in the form of CO2 and heat and light is released.

It is a physical change due to tje conversion of wax into wax vapours since wax was just evaporating