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In BX3,B-X distance is shortes than what...

In `BX_3,B-X` distance is shortes than what is expected theoretically because (X = F, Cl Br , I)

A

`sp^3` hybridisation of B is responsible for shorter B - X

B

B - X has a double bond character due to back - bonding

C

Dimerisation takes place in `BX_3` which is responsible for shorter B - X distance

D

Due to larger size of X, B - X distance decrease

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The correct Answer is:
B
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Explain the following : (a) Aluminium vessel can be used to store conc HNO_(3) . (b) AlCl_(3) forms a dimer, but BCl_(3) does not. ( c) Al metal is frequency used as a reducing agent for the extraction of metal such as Cr , etc. (d) Al cannot be prepared by the electrolysis of aqueous solution of its salt. ( e) The B-X distance is shorter than what is expected theoretically in BX_(3) molecule (X = F, Cl, Br, I) . (f) Althrough the ionisation potential of B(8.30 eV) is less than gold (9.22 eV) , yet B is a non-metal while gold is a metal.

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