Question

Which of the following change s are irreversible?
(a) Lifting up a chair
(b) Cooking a pot of rice
(c) Bursting a balloon
(d) Filling a glass with orange juice

Tincture of iodine is a weak solution of iodine in alcohol. Iodine can be recovered from tincture of iodine by the process of :
(a) Filtration
(b) Distillation
(c) Evaporation
(d) Decantation

A piece of one of the following materials float in water. This one is:
(a) Wood
(b) Soil
(c) Chalk powder
(d) Glass
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Answer 1

Answer:

1)B

2) filtration

3)wood