State whether the following statements are true or false:
(a) When a candle burns, both physical and chemical changes take place.
(b) Anaerobic bacteria digest animal waste and produce biogas.
(c) Ships suffer a lot of damage though they are painted.
(d) Stretching of rubber band is not a physical change.

AcademicChemistryNCERTClass 7

(a) True

(b) True

(c) True

(d) False

The stretching of a rubber band is a physical change.

Updated on 10-Oct-2022 13:21:31