What is the number of moles of secondary carbon atoms in $n \ mol$ of isopentane?

The reaction of $1, 3-$dibromopropane with metallic zinc gives ..........

The melting points of alkanes with an odd number of carbon atoms are ............... compared to those with an even number of carbon atoms in the chain.

Hexane yields different products under different conditions. Provide three such reactions.

Which of the following conditions will give the maximum yield of $C_2H_5Cl$?

Paraffin is soluble in .........