Question

0.1
Which of the following changes represents
a physical change?
(A) Conversion of sulphur to sulphur dioxide
(B) Heating of a metal knife
(C) Combustion of methane
(D) Hydrolysis of an ester​

Answer 1

Answer:

(B) Heating of a metal knife

Answer 2

Physical changes is

(B) Heating of metal knife

as it can be reversed by cooling it........