Question

i. Assertion A: At construction sites, the pebbles and the other impurities are removed from sand by the
process of sieving.
Reason R: In the process of sieving, we make use of the difference in size of particles to separate them

Answer 1

Assertion(A)is true and Reason(R) is true.Reason(R) is the correct explanation for Assertion(A).

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Answer 2

Sieves are used at construction sites to separate pebbles and stones from sand. Sieves are also used to separate fine flour particles from the bigger impurities.