When `BF_3` is treated with LiH at 450 K, a hydride of borbon is formed. Identify the hydride of boron formed in the above reaction.

When BF_3 is treated with LiH at 450 K, a hydride of borbon is formed. Briefly explain the structure of the above mentioned hydride.

When BF_3 is treated with LiH at 450 K, a hydride of borbon is formed. Boron compounds behave as Lewis acids. Why?

Identify the product formed in the given reaction,

When bromoethane is reacted with sodium in the presence of ether an alkane is formed.Give the chemical equation for the above reaction.

When 2-butyne is treated with dil H_2 SO_4 HgSO_4 the product formed is

When boron burns in air it forms:

Bromoethane when treated with alcoholic KOH gives ethene, KBr and H_2O . Identify the type of reaction.

Bromoethane when treated with alcoholic KOH gives ethene, KBr and H_2O . Explain the rule behind the above reaction .