Nomenclature of Cyanides and Isocyanides

Which of the following is an isomer of butanenitrile?

Isomerisation of ${\mathrm{CH}}_3\mathrm{NC}$ to ${\mathrm{CH}}_3\mathrm{CN}$ is a prototypical _____ reaction.

Acetonitrile is an isomer of methyl isocyanide.

Draw the structure(s) of the functional isomer(s) of ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{NC}$?

The functional isomer of ethanenitrile is

Discuss the applications of methyl isocyanide and its functional isomer in organic chemistry.
 

Why is the isomerisation of isocyanides to nitriles considered a prototypical unimolecular reaction?
 

Write the structure of isomers of isocyanides.

Provide the IUPAC names for the functional isomers of methyl isocyanide.

Which is the functional isomer of methyl isocyanide?

Cotyledons are also called-