Which of the following isomers of $\text{C}_4\text{H}_9\text{OH}$ has lowest boiling point ?

Identify the 'product' in the following reaction.
Pent - 3 - enenitrile $\xrightarrow[\large{\text{H}_3\text{O}^+}]{\large{\text{Al H (i-Bu)}_2}}$ Product

Identify the product obtained when isopropyl magnesium chloride in dry ether reacts with dry ice forming a complex, hydrolysed further.

What is the number of moles of hydrogen atoms needed to obtain one mole ethanamine from acetamide using $\text{LiAl H}_4$ /ether as reducing agent.