Assertion (A): If aluminium atoms replace

Question:

Assertion (A): If aluminium atoms replace a few silicon atoms in three

the dimensional network of silicon dioxide, the overall structure

acquires a negative charge.

Reason (R): Aluminium is trivalent while silicon is tetravalent.

(i) Both A and R are correct and R is the correct explanation of A.

(ii) Both A and R are correct but R is not the correct explanation of A.

(iii) Both A and R are not correct

(iv) A is not correct but R is correct.

Solution:

Option (i) Both A and R are correct and R is the correct explanation of A is correct.

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