How can you perform the following conversions?
(i) But-2-ene to Ethanol.
(ii) Cyclohexanol to Cyclohexanone
(iii) Butyne to Butan-2-one
(iv) p-Nitrotuluene to p-Nitrobenzaldehyde
(iv) Pent-3-en-2-ol to Pent-3-en-2-one

Explanation

(i) `CH_(3)CH=CH-CH_(3) underset(Zn//H_(2)O)overset(O_(3))to 2CH_(3) - CHO`
(ii)
(iii) `CH_(3)CH_(2)C-=CH overset("dil"H_(2)SO_(4))underset(Hg^(+2))to CH_(3)CH_(2)- overset(O)overset(||)C-CH_(3)`
(iv)
(v) `CH_(3)-overset(OH)overset(|)(CH)-CH_(3)-CH_(3)-overset("pcc")to (CH_(3))-overset(O)overset(||)C-CH=CH-CH_(3)`