Question

3. Give reasons.
(a) While purchasing canned food, its
expiry date should be checked.
(b) An iron article should be given a coat
of paint.
(c) A wooden article should be polished.
(d) Copper and brass utensils should be
. tinned.
(e) A dry handkerchief gets wet at once
on dipping in water, but it takes long
for a wet handkerchief to dry.​

Answer 1

Answer:

a. it may cause health problems if the product will be expired

b.to prevent it from rusting

c.to protect from the action of air and moisture

d.to prevent from rusting and making poisons compounds.

e.because of diffusion of water molecule.