$(BN)_n$ exists in
Benzene like structure
graphite like structure
both form
it does not exist
Which among the following statement(s) is(are) true for the extraction of aluminium from bauxite?
$(A)$ Hydrated $Al _2 O _3$ precipitates, when $CO _2$ is bubbled through a solution of sodium aluminate.
$(B)$ Addition of $Na _3 AlF _6$ lowers the melting point of alumina.
$(C)$ $CO _2$ is evolved at the anode during electrolysis.
$(D)$ The cathode is a steel vessel with a lining of carbon.
The formation of molecular complex $BF_3 - NH_3$ results in a change in hybridization of boron
In electrolysis of aluminium oxide which of the following is added to accelerate the process
In the extraction of aluminium, bauxite is dissolved in cryolite because
Give important trends and anomalous properties of boron.