State whether the statements given below are True or False:
i. Stone is transparent, while glass is opaque.
ii. A notebook has luster while eraser does not.
iii. Chalk dissolves in water.
iv. A piece of wood floats in water.
v. Sugar does not dissolve in water.
vi. Oil mixes with water.
vii. Sand settles down in water.
viii. Vinegar dissolves in water.
(i) False, glass is a transparent because it allows light to pass through it, while stone is opaque object because it does not allow light to pass through it.
(ii) False, Notebook and eraser do not have any luster as they are not metals.
(iii) False, Chalk does not dissolve in water because it is insoluble in water.
(iv) True, a piece of wood floats on water because the density of wood is lesser than that of water.
(v) False, Sugar is soluble in water.
(vi) False, Oil does not dissolve in water. It makes a separate layer on water.
(vii) True, Sand settles down in water as it is heavier than water.
(viii) True, Vinegar is soluble in water.