The major product of the following reaction contains ____________ bromine atom(s).

Consider the above reaction. The number of $$\pi$$ electrons present in the product 'P' is __________.

A chloro compound "A".

(i) forms aldehydes on ozonolysis followed by the hydrolysis.

(ii) when vaporized completely 1.53 g of A, gives 448 mL of vapour at STP.

The number of carbon atoms in a molecule of compound A is ___________.