Question

tick (✓) the correct answer.
(a) which of the following is observed when water is transferred from a glass to a bottle?
i) change in colour
ii) change in taste
iii) change in smell
iv) change in shape
(b) which physical property of water changes when orange juice is added to it?
i) colour and taste
ii) colour
iii) colour, taste and smell
iv) shape
(c) which of the following methods of purification kills the microorganisms present in water?
i) chlorination
ii) filtration
iii) sedimentation
iv) decantation

Explanation:

(a) Water is a liquid and takes the shape of its container. Transferring it from a glass to a bottle changes its shape.
(b) Adding orange - juice to water changes its colour, taste and smell.
(c) Chlorination is a method of water purification that kills microorganisms. Filtration removes particles, sedimentation separates heavier particles by settling and decantation separates a liquid from a solid sediment.

Answer:

(a) iv) Change in shape
(b) iii) Colour, taste and smell
(c) i) Chlorination