Note: In the following questions a statement of Assertion (A) followed by a statementof Reason (R) is given. Choose the correct option out of the choices given below each question.
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.
If aluminium atoms replace a few silicon atoms in 3D network of silicon dioxide, the overall structure acquires a negative charge. Then, Aluminium is trivalent while silicon is tetravalent. It is so because as the equivalent number of trivalent ions like (Al+3) replace few tetrahedral Si atoms in the 3D structure of Silicon dioxide, the valence electron of each Si atom gets freed, thereby resulting in the formation of a negatively charged structure. Thus, SiO2 acquires negative charge.
Therefore, both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
So, option (i) is correct.
Couldn't generate an explanation.
Generated by AI. May contain inaccuracies — always verify with your textbook.
