Tertiary alcohol is obtained as major product in `:`

Amine is obtained as major product in

A tertiary alcohol is

Which of the two isomeric alkenes is obtained as a major product when 2-bromobutane is heated with alcoholic KOH?

A tertiary alcohol is obtained when Grignard reagent react with

From which of the following tertiary butyl alcohol is obtained by the action of methyl magnesiumiodide

. The major product obtained is