Assertion (A) : If aluminium atoms replace a few silicon atoms in three dimensional network of silicondioxide, the overallstructureacquiresa negative charge. Reason (R) :Aluminiumis trivalent while silicon is tetravalent.

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

1.	Assertion (A) : If aluminium atoms replace a few silicon atoms in three dimensional network of silicondioxide, the overallstructureacquiresa negative charge. Reason (R) :Aluminiumis trivalent while silicon is tetravalent.
Answer» Both A and R are CORRECT and R is the correct EXPLANATION of A. Both A and R are correct and R is not the correct explanation of A. Both A and R are not correct. A is not correct but R is correct. Answer :A::C