Question

7. The burning of a candle is a change which
can be categorised as
a) reversible b) irreversible
c) physical
d) both physical and chemical
8. Cutting your hair is a/an
change.
(i) reversible
(ii) irreversible
(iii) chemical
(iv) physical
a) (i) and (iii)
b) (ii) and (iv)
c) (ii) and (iii)
d) (iii) and (iv)
9. Which of these changes are physical and
irreversible?
(i) folding of clothes
(ii) melting of butter
(iii) breaking of glass
(iv) chopping of wood
a) (i) and (iii)
b) (ii) and (iv)
c) (ii) and (iii) d) (iii) and (iv)​

Answer 1

• burning of candle is an irreversible and chemical change
• cutting of hair is an irreversible and physical change ( physical change because no new substance is formed)
• folding of clothes and melting of butter are reversible change

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Answer 2

Answer:

7. physical

8. Cutting your hair is a physical change.

9. (¡¡¡) & (iv)

Explanation:

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