Question

(b) The chemical name of baking soda is
(c) Two methods by which rusting of iron can be prevented are
and
(d) Changes in which only _______properties of a substance change are called physical chqnges ​

Answer 1

Answer:

(B) :- SODIUM BICARBONATE

(C) :- GALVANISATION, ELECTROPLATING

(D) :- PHYSICAL

Answer 2

Explanation:

(b) Sodium hydrogen carbonate

(c)The rusting of iron can be prevented by painting, oiling, greasing or varnishing its surface.

(c)physical