p-Block Elements-I - Result Question 12
####12. Among the following, the correct statement(s) is(are)
(2017 Adv.)
(a) $Al\left(CH _3\right) _3$ has the three-centre two-electron bonds in its dimeric structure
(b) The Lewis acidity of $BCl _3$ is greater than that of $AlCl _3$
(c) $AlCl _3$ has the three-centre two-electron bonds in its dimeric structure
(d) $BH _3$ has the three-centre two-electron bonds in its dimeric structure
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Answer:
Correct Answer: 12. (b, d)
Solution:
- (a)
(b) $BCl _3$ is stronger Lewis acid than $AlCl _3$ due to greater extent of $p _{\pi}-p _{\pi}$ back bonding in $AlCl _3$.
(c)
(d)
