Rajasthan Police Constable Model Paper 9

Concept:
The compounds are characterized by their functional group:
1. Aldehyde: These compounds have R -CHO as their functional group.
2. Ketone: These compounds are characterized by R-CO- R type of functional groups where R is alkyl chain.
3. Acid: Compounds containing the R-COOH group at the end are called carboxylic acids
4. Alcohols: Alcohols have -OH group attached to its end.Application:

• From the above discussion, only the Carboxylic Acid group has 2 oxygen atoms.
• The given compounds can be written as:

$\mathit{C}{\mathit{H}}_3\mathit{–}\mathit{C}{\mathit{H}}_2$ – COOH

• Which is the chemical formula for Propanoic acid.