Diimide $(N_2H_2)$ is used to reduce the double bond of:

Consider the following reaction sequence:
$2-\text{Methylpropane}$ $\xrightarrow{KMnO_4} X$ $\xrightarrow[358 \ K]{20 \% \ H_3PO_4} Y$ $\xrightarrow[\text{(ii) } Zn \mid H_2O]{\text{(i) } O_3} A + B$
What are $A$ and $B$?

What is the product of the reaction $CH_3CH_2CH=CH_2$ $\xrightarrow{1. Hg(OAc)_2, H_2O}$ $\xrightarrow{2. NaBD_4}$?

In polyenes that contain differently substituted $(C=C)$ double bonds,it is possible to hydrogenate chemoselectively one $(C=C)$ double bond. The product of the reaction of limonene with one mole of $H_2$ in the presence of $PtO_2$ is:

In which of the following compounds will the carbon-carbon double bond length be maximum?

An alkene $X$ $(C_4H_8)$ exhibits geometrical isomerism. Oxidation of $X$ with $KMnO_4 | H^+$ gives $Y$. On heating the sodium salt of $Y$ with a mixture of $NaOH$ and $CaO$,$Z$ is obtained. What is $Z$?