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JAMB Chemistry 2017 Paper

Question : 1

Total: 49

The general formula of alkanones is

Solution:

Concept:

Alkanones are another name for ketones, so their general structure shows a carbonyl group bonded to two carbon groups.

Explanation:

In a ketone, the carbonyl group (

\mathrm{C=O}

) is attached to two alkyl or aryl groups.

Therefore, the general formula is written with two R groups, denoted as

R

and

R'

This matches the formula

R\mathrm{CO}R'

, where

R

and

R'

are hydrocarbon groups.

The options

R\mathrm{CHO}

R\mathrm{COOH}

, and

R\mathrm{COO}R

represent aldehydes, carboxylic acids, and esters, respectively.

Answer:

R\mathrm{CO}R'

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