Baeyer's reagent is ....

When $2-$Methylbut$-2-$ene is treated with hydrogen chloride,the major product obtained is

For the given reaction:
(Cyclohexyl)-$CH$=$CH$-(Cyclohexyl) $\xrightarrow{KMnO_4/H^+}$ '$P$' (major product)
'$P$' is:

How many optical isomers are possible for the compound obtained by the hydrogenation of $(CH_3)_2C = CH-CH_3$?

Consider the addition of $HBr$ to $3,3$-Dimethyl-$1$-butene shown below. What is the best mechanistic explanation for the formation of the observed product?

In the addition of $HOBr$ to $(I)$ $Cl_3C-CH=CH_2$ and $(II)$ $CH_3-CH=CH_2$: