Naphthalene can be separated from sand :
(a) by sublimation
(b) by distillation
(c) by crystallisation
(d) by using water as solvent

Q. State whether the following are true or false.
(a) A mixture of milk and water can be separated by filtration.
(b) A mixture of water and oil can be separated by distillation.
(c) Filtration will separate wheat from husk
(d) Camphor and sand are mixed together. By heating, camphor will sublime and the vapours can be collected. This will leave behind sand.
(e) A mixture of naphthalene and chalk powder has the smell of naphthalene.
(f) A mixture of tamarind and sugar will taste both sweet and sour.
(g) The process of loading results in better sedimentation.
(h) Sieving is the best method to separate jeera seeds form its stalk.

Q. Which of the following mixture cannot be separated by using water as the solvent ?
(a) copper sulphate and sand
(b) sand and potash alum
(c) sand and sulphur
(d) sugar and sand

Q. The dyes present in fountain pen ink can be separated by the technique of :
(a) fractional distillation
(b) infrared photography
(c) crystallisation
(d) chromatography

Q. Identify the mixtures that can be separated by evaporation and sublimation by marking them “E” and “S” respectively.​

A.	Copper sulphate and water
B.	Dye and water ​
C.	Iodine and sand​