Hydroboration

Q.

During debromination of meso-2, 3-dibromobutane, the major compound formed is

1. N-butane

2. 1-butene

3. Cis-2-butene

4. Trans-2-butene

Q.

Which of the following compound would yield trialkyl borane as shown below when treated with $B{H}_3$ and THF ?

1. 2 - Methyl but-1-ene

2. 2 - Methyl but-2-ene

3. 3 - Methyl but-1-ene

4. 3 - Methyl but-1-ene