The product $(P)$ in the reaction is:

Hydroboration of $1$-methylcyclopentene using $B_2D_6$,followed by treatment with alkaline hydrogen peroxide,gives

What is the major product expected from the following reaction?

Which of the following reactions produce the same product?

$A$ triene is treated with ozone followed by zinc in acetic acid to give the following three products. What is the structure of the triene?

$A$ straight chain hydrocarbon has the molecular formula $C_8H_{10}$. The hybridisation for the carbon atoms from one end of the chain to the other are respectively $sp^3$,$sp^2$,$sp^2$,$sp^3$,$sp^2$,$sp^2$,$sp$ and $sp$. The structural formula of the hydrocarbon would be