Question

The formulae of two organic acids X and Y are ${\mathrm{C}}_{10}{\mathrm{H}}_{21}\mathrm{COOH}$ and ${\mathrm{C}}_{19}{\mathrm{H}}_{39}\mathrm{COOH}$. Which one of these two exists as a liquid at room temperature?

Answer 1

Step 1:

The group of atoms that present in a molecule and tells about the characteristics reactions of organic compounds is called a functional group

Carboxylic acid is an organic compound that contains a $\left(\mathrm{COOH}\right)$ Carboxyl functional group.

Step 2:

The molar mass of organic acid Y $\left({\mathrm{C}}_{19}{\mathrm{H}}_{39}\mathrm{COOH}\right)$ is greater than X so, it is solid at room temperature.

The acid X $\left({\mathrm{C}}_{10}{\mathrm{H}}_{21}\mathrm{COOH}\right)$ exist as a liquid due to its low molecular weight compared to the acid Y $\left({\mathrm{C}}_{19}{\mathrm{H}}_{39}\mathrm{COOH}\right)$ acid.

The organic acid X $\left({\mathrm{C}}_{10}{\mathrm{H}}_{21}\mathrm{COOH}\right)$ exists as a liquid at room temperature.