Write the IUPAC names of the following ketones and aldehydes. Whenever possible, give also common names.
Write the IUPAC names of the following ketones and aldehydes. Whenever possible, give also common names.

(i) \mathrm{CH}_{3} \mathrm{CO}\left(\mathrm{CH}_{2}\right)_{4} \mathrm{CH}_{3}
Ans: The IUPAC name of the given compound is Heptan-2-one and its common name is Methyl n-pentyl ketone.
(ii) \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CHBrCH}_{2} \mathrm{CH}\left(\mathrm{CH}_{3}\right) \mathrm{CHO}
Ans: The IUPAC name of the given compound is 4-Bromo-2-methylhexanal and its common name is y-Bromo-(I-methylcaproaldehyde
(iii) \mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{5} \mathrm{CHO}
Ans: The IUPAC name of the given compound is Heptanal.
(iv) \mathrm{Ph}-\mathrm{CH}=\mathrm{CH}-\mathrm{CHO}
Ans: The IUPAC name of the given compound is 3 -Phenylprop-2-enal and its common name is beta-phenylacrolein.
(v)
O=CC1CCCC1
Ans: The IUPAC name of the given compound is Cyclopentanecarbaldehyde and its common name is also Cyclopentanecarbaldehyde.
(vi) PhCOPh
Ans: The IUPAC name of the given compound is Diphenylmetthanone and its common name is Benzophenone.