1.

(A): High purity gallium for semiconducting purpose can be obtained by zone refining (R): Zone refining works on the principle of fractional crystallisation, leading to high purity

Answer»

Both A & R are TRUE, R is the correct EXPLANATION of A
Both A & R are true, R is not correct explanation of A
A is true, R is false
A is false, R is true

Answer :A


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