Which of the following statements is/are correct?

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Out of trimethylamine and trimethylphosphine, trimethylamine has higher dipole moment.

Out of $({SiH}_{3})_{2} O$ and $({CH}_{3})_{2} O, ({SiH}_{3})_{2} O$ is more basic

$C - C$ bond length (in pm) in $C_{2}$ molecule is greater than $O - O$ bond length in $O_{2}$

molecule. $N ({SiMe}_{3})_{3}$ and ${BF}_{3}$ molecules are isostructural.

answer is A.

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Detailed Solution

(a) Out of trimethylamine and trimethylphosphine, trimethylamine has higher dipole moment because of electronegative property.

(b) $({SiH}_{3})_{2} O$ has back bonding, hence, l.p. is less available for donation ⇒ weaker Lewis base.
(c) B.L.
⇒ $C_{2}$ molecule $(125 pm) >$ $O_{2}$ molecule (120 pm)
(d) Both $N ({SiMe}_{3})_{3}$ and ${BF}_{3}$ are isostructural

Thus, the correct option are a,c and d.

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