Identify the product $$[\mathrm{C}]$$ formed at the end of the reaction below

1,1,2,2- Tetrabromopropane + 2 $$\mathrm{Zn}_{(\mathrm{S})}$$ / Ethanol $$\rightarrow$$ [B]

$$[\mathrm{B}]$$ + 2 moles of $$\mathrm{HBr} \rightarrow[\mathrm{C}]$$

Given below are 4 reactions. Two of these reactions will give product which is an equimolar mixture of the d and 1 forms. Identify these 2 reactions.

[A] 2- Methylpropene + $$\mathrm{HI} \rightarrow$$ ---------

[B] But-1-ene + $$\mathrm{HBr} \rightarrow$$ -----------

[C] 3-Methylbut-1-ene + $$\mathrm{HI} \rightarrow$$ -----------

[D] 3- Phenylpropene + $$\mathrm{HBr}$$ (Peroxide) $$\rightarrow$$ -----------

Which of the following reactions is an example for incomplete combustion?

An unsaturated hydrocarbon $$[\mathrm{A}]$$ reacts with $$\mathrm{HBr}$$ in presence of Benzoyl peroxide to yield [B] Compound [A] when reacted with cold, dilute alkaline $$\mathrm{KMnO}_4$$ gave compound [C], 2-Methylbutane-2, 3-diol But when [A] is reacted with hot $$\mathrm{KMnO}_4$$, it yielded $$\mathrm{CH}_3 \mathrm{COOH}$$ and a compound [D] Identify compounds [A], [B] and [D]