question_answer 14)

State whether the statements given below are True or False. (a) Stone is transparent while glass is opaque. (b) A notebook has lustre while eraser does not. (c) Chalk dissolves in water. (d) A piece of wood floats on water. (e) Sugar does not dissolve in water. (f) Oil mixes with water. (g) Sand settles down in water. (d) Vinegar dissolves in water.

Answer:

(a) False, glass is transparent because it allows light to pass through it, while stone is opaque because it does not allow light to pass through it. (b) False, notebook and eraser do not have any lustre because they are not metals. (c) False, chalk is insoluble in water. (d) True, wood floats on water because density of wood is lesser than that of water. (e) False, sugar is soluble in water. (f) False, oil does not mix with water, in fact it floats on water. (g) True, it is heavier than water, i.e. its density is more than that of water. (h) True, it is soluble/dissolve in water.