An alkyl chloride on Wurtz reaction gives $2,2,5,5$-tetramethylhexane. The same alkyl chloride on reduction with zinc-copper couple in alcohol gives hydrocarbon with molecular formula ${\mathrm{C}}_5{\mathrm{H}}_{12}$. What is the structure of alkyl chloride?

The product ‘$\mathrm{B}$’ in the above reaction sequence is,

Write $\mathrm{IUPAC}$ name of the following compound:

Write $\mathrm{IUPAC}$ name of the following compound:

Write $\mathrm{IUPAC}$ name of the following compound:

Write the structure and $\mathrm{IUPAC}$ name of the major product in the following reaction: