Addition Reactions :
`(i)` `text(Reduction to alkanes)` : See fig.1.
`text(Example)`
`underset(2 = penten -1 - ol)(CH_3CH_2 -C equiv C -CH_2 -OH) +2H_2 overset(Pt//H_2)-> underset(text(Pentan -1- ol))(CH_3CH_2 -CH_2-CH_2 -CH_2-OH)`
(ii) `text(Reduction to alkenes)` : See fig.2.
`text(Example)` : See fig.3.
(iii) `text(Addition of halogens)` `(X_2 = Cl_2, Br_2)` : See fig.4.
(iv) `text(Addition of hydrogen halides)` (where `HX` = `HCI, HBr, or HI`) : See fig.5.
`text(Example)` : See fig.6.
(v) `text(Addition of water)`
`(a)` `text(Catalyzed by)` `HgSO_4 // H_2SO_4` : See fig.7.
`text(Example)` See fig.8.
`(b)` `text(Hydroboration-oxidation)` : See fig.9.
`text(Example)` : See fig.10.
`text(Example)`
`underset(2 = penten -1 - ol)(CH_3CH_2 -C equiv C -CH_2 -OH) +2H_2 overset(Pt//H_2)-> underset(text(Pentan -1- ol))(CH_3CH_2 -CH_2-CH_2 -CH_2-OH)`
(ii) `text(Reduction to alkenes)` : See fig.2.
`text(Example)` : See fig.3.
(iii) `text(Addition of halogens)` `(X_2 = Cl_2, Br_2)` : See fig.4.
(iv) `text(Addition of hydrogen halides)` (where `HX` = `HCI, HBr, or HI`) : See fig.5.
`text(Example)` : See fig.6.
(v) `text(Addition of water)`
`(a)` `text(Catalyzed by)` `HgSO_4 // H_2SO_4` : See fig.7.
`text(Example)` See fig.8.
`(b)` `text(Hydroboration-oxidation)` : See fig.9.
`text(Example)` : See fig.10.