Heating and subsequent cooling of certain substances are given below. Classify them into either physical or che1nical change. (a) Lead nitrate. (b) Uluish green copper carbonate (c) Yellow coloured Jead oxide (d) White powdered zinc oxide

Heating and subsequent cooling of certain substances are given below.

1.	Heating and subsequent cooling of certain substances are given below. Classify them into either physical or che1nical change. (a) Lead nitrate. (b) Uluish green copper carbonate (c) Yellow coloured Jead oxide (d) White powdered zinc oxide
Answer» Solution :Physical changes are heating of YELLOW coloured lead oxide and WHITE powdered ZINC oxide. Chemical changes are heating of lead nitrate and BLUISH green copper carbonate.