Question

9. Which of the following are physical changes :c
(i) Melting of iron metal
(ii) Rusting of iron
(iii) Bending of an iron rod
(iv) Drawing a wire of iron metal
(a) (i), (ii) and (iii)
(b) (i), (i) and (iv)
(c) (i), (iii) and (iv)
(d) (i), (iii) and (iv)
10. Mass can neither be created nor be destroyed. This is the statement
ofic
(a) Law of conservation of mass,
(b) Law of constant proportion
(c) Dalton's Law
(d) Avogadro's Law​

Answer 1

Answer:

1.(a) is your correct answer

2.(a)law of conservation of mass

Answer 2

Answer:

B and A

Explanation:

1. Because change is physical that is physical damage to the iron

2. Law of conservation of mass