Write the IUPAC name of the following compound:

${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{COCl}$

Write the structural formulae of the following:

$2,2,3-$Trimethylbutane

Write the structural formulae of the following:

$1-$Chloropropane-$2$-one

Write the structural formulae of the following:

Benzoyl chloride

Name the compound on the basis of IUPAC system.

${\mathrm{CH}}_3{\mathrm{COCH}}_2{\mathrm{CH}}_3$

Name the compound on the basis of IUPAC system.

Arrange the following functional groups in the increasing order of priority.

$-\mathrm{OH}, -\mathrm{COOH}, -\mathrm{CN}, -{\mathrm{NO}}_2,$

Write down all the possible structural isomers of ${\mathrm{C}}_4{\mathrm{H}}_{10}$.