Assertion (A): If aluminium atom s repla...

Assertion (A): If aluminium atom s replace a few silicon atoms in three dimensional network of silicon dioxide, the overall structure acquries a negative charge.
Reason(R): Aluminium is trivalent while silicon is tetravalent.

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.

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The correct Answer is:

A, C

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Assertion (A) : If aluminium atoms replace a few silicon atoms in three dimensional network of silicon dioxide, the overall structure acquires a negative charge Reason (R) : Aluminium is trivalent while silicon is tetravalent.

Both A and R are correct and R is the correct explanation of A

Both A and R are correct but R is not the correct explanation of A

Both A and R are not correct

A is not correct but R is correct

if both assertion and reason are true and the reason is the correct explanation of the assertion.

if both assertion and reson are true but reason is not the correct explanation of the assertion.

If assertion is true but reason is false.

If the assertion and reason both are false.

If both (A) and (R) are correct and (R) is correct explanation of (A)

If both (A) and (R) are correct and (R) is not correct explanation of (A)

If (A) is correct , but (R) is incorrect

If (A) is incorrect but (R) is correct .