1.

Select the incorrect statement about the boron.

Answer»

Pure FORM of the elements are obtained by the reduction of `BCl_(3)` with zinc at `900^(@)C`.
Crystalline boron is attacked only by hot concentrated oxidising agents.
Amorphous boron and ammonia at white GIVES `(BN)_(x)`, a slippery white solid with a layer structure resembling that of graphite.
Boron does form `B^(3+)` cation easily.

Solution :Due to small size of boron the sum of its first three ionization ENTHALPIES is very high.This prevents it to form `+3` ions.


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