Question

Name two liquids soluble in water.

Answer 1

Hint: Water is a compound that is used as a universal solvent because most of the compounds, whether solid, liquid, or gas can be dissolved in it. Usually, liquids are soluble in water because of the formation of hydrogen bonding. Some of the liquids that can be dissolved in the water can be alcohols, ketones, carboxylic acids, etc.

Complete answer:
Water is a compound that is used as a universal solvent because most of the compounds, whether solid, liquid, or gas can be dissolved in it. This is due to the fact that in water molecules there are oxygen and hydrogen atoms, oxygen can form hydrogen bonding with other compounds having hydrogen and an electronegative atom.
Some of the liquids that can be dissolved in the water can be alcohols, ketones, carboxylic acids, etc. For example, ethanol is dissolved in water because there is a hydroxyl group at the end of the carbon atom and the formula of ethanol is $C{{H}_{3}}-C{{H}_{2}}-OH$, so, this oxygen atom can form hydrogen bonding with the hydrogen atoms in the water. Ethanol is also a colorless liquid but its density is lesser than water.
Another example is acetic acid is dissolved in water because there is carboxylic acid at the end of the carbon atom and the formula of acetic acid is $C{{H}_{3}}-COOH$, so, this oxygen atom can form hydrogen bonding with the hydrogen atoms in the water. Acetic acid is also a colorless liquid but its density is heavier than water.

Note: The compounds that have higher hydrocarbon part in the compound then it is not soluble in water because hydrocarbon is hydrophobic for example hexanoic acid, pentanoic acid, hexanol, etc.