Question
Question: Select the incorrect statement about the boron....
Select the incorrect statement about the boron.
A
Pure form of the elements are obtained by the reduction of BCl3 with zinc at 900ºC.
B
Crystalline boron is attacked only by hot concentrated oxidising agents.
C
Amorphous boron and ammonia at white heat gives (BN)x, a slippery white solid with a layer structure resembling that of graphite.
D
Boron does form B3+ cation easily.
Answer
Boron does form B3+ cation easily.
Explanation
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.