Question

Amar and Rohit expanded (a – 4)2. Amar’s answer is a2 – 16a and Rohit’s answer is a2 – 8a
+ 16. Which of the following statements is correct ?
(a) Amar’s answer is correct (b) Rohit’s answer is wrong
(c) Both got correct answer (d) Rohit’s answer correct

Answer 1

Answer:

greater than that of AlCl3

The statements  (A), (B) and (D) are correct.

(A) BH3 has the three-centre two-electron bonds in its dimeric structure as it is electron-deficient species. The three-centre two-electron bonds correspond to hydrogen bridges between 2 B atoms.

(B) Al(CH3)3 has the three-electron two-electron bonds in its dimeric structure as it is electron-deficient species. The three-centre two-electron bonds correspond to carbon bridges between 2 Al atoms.

(D) The Lewis acidity of BCl3 is greater than that of AlCl3 as the bond formed with the base will involve 2p orbital overlap which is stronger than the 3p orbital overlap in the case of AlCl3.

The statement (C) is incorrect.

AlCl3 has the three-centre four-electron bonds in its dimeric structure. These bonds correspond to chlorine bridges between 2 Al atoms.

Step-by-step explanation:

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