Q11Multiple choice
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.
Show answer
(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.