Classify the following reactions in one of the reaction type studied in this unit.
`CH_3CH_2 Br + HS^(-) to CH_3 CH_2 SH`

Explanation

(a) Nucleophile substitution reaction
(b) Addition reaction
( c) Nucleophilic substitution and `1,2-Methyl shift`.
`CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-CH_(2)OH overset(H^(o+))underset(-H_(2)O)rarrCH_(3)-overset(CH_(3))overset(|)underset(CH_(3))underset(|)(C)-overset(CH_(2) overset(1,2-"Methyl")underset("shift")rarr`
`CH_(3)-underset(o+)overset(CH_(3))overset(|)(C)-CH_(2)-CH_(3)overset(Br^(Theta))rarr(CH_(3))_(2)C(Br)CH_(3)CH_(3)`
(d) Elimination reaction.