The reaction of $3$-cyclohexenol with $OsO_4$ gives two products $X$ and $Y$ in a ratio of $12:1$. The major product $(X)$ is:

The total number of alkenes possible by dehydrobromination of $3$-bromo-$3$-cyclopentylhexane using alcoholic $KOH$ is

How many products are formed in the following reaction?
$1,4$-dimethylcyclohex-$1$-ene + $HBr \rightarrow$ ?

An organic compound $X$ with molecular formula $C_{11}H_{14}$ gives an optically active compound on hydrogenation. Upon ozonolysis,$X$ produces a mixture of compounds $P$ and $Q$. Compound $P$ gives a yellow precipitate when treated with $I_{2}$ and $NaOH$ but does not reduce Tollen's reagent. Compound $Q$ does not give any yellow precipitate with $I_{2}$ and $NaOH$ but gives Fehling's test. The compound $X$ is:

During the debromination of $meso-2,3-dibromobutane$,the major compound formed is:

Baeyer's reagent is ....