Page 234 - Chemistry ICSE Class IX

222 ICSE Chemistry – 9

5. Which property of the constituents is employed for separating salt from sand?
Ans. Difference in the solubility behaviour of sand and salt is employed in their separation. Salt is soluble in water, whereas
sand is insoluble.
6. x g of A and y g of B are used to prepare a mixture. Find out the mass percent of B in the mixture.
.
Mass of B × 100 y 100
Ans. Mass percent of B = =
Mass of A + Mass of B x + y
7. What kind of filter paper should be used in separating the insoluble component of a mixture and the solution of the other
(soluble) component?
Ans. The filter paper should have pores smaller than the particle size of the insoluble component.