Predict the major product, when 2-methyl but-2-ene is converted into an alcohol in each of the following methods.
(i) Acid catalysed hydration.
(ii) Hydroboration
(iii) Hydroxylation using Bayer's reagent.

Explanation

(i) Acid catalysed hydration.
`underset("2-methylbut-2-ene")(CH_(3)-CH=underset(CH_(3))underset(|)C-CH_(3) overset(H_(2)SO_(4)) to CH_(3)-CH_(2) -overset(HSO_(4))overset(|)underset(CH_(3))underset(|)C-CH_(3) overset(HOH)to H_(2)SO_(4) + CH_(3)-CH_(2)-overset(OH)overset(|)underset(CH_(3))underset(|)C-CH_(3)`
(ii) Hydroboration:
Diborane reacts with an alkene to form trialkyl borane which on treatment with `H_(2)O_(2)` in presence of NaOH gives an alcohol. The overall reactions is hydration of an alkene. This reaction yields an anti-Markownikoff's product.
`6CH_(3)-CH=CH_(2) + B_(2)H_(6) to underset("Tripropylborne")(2(CH_(3)-CH_(2)-CH_(2))_(3)B`
`(CH_(3)-CH_(2)-CH_(2))_(3) + 3H_(2)O overset(OH^(-)) to 3CH_(3)-underset("propan-1-ol") (CH_(2)-CH_(2)-OH) + B(OH)_(3)`
(iii) Hydroxylation using bayer's reagent
`underset(2-"methylbut"-2-"ene") (CH_(3)-CH=underset(CH_(3))underset(|)C-CH_(3) overset("Alk") underset(KMnO_(4)) to CH_(3)-underset(OH)underset(|)(CH)-underset(CH_(3))underset(|)overset(OH)overset(|)C-CH_(3)`