Question

find odd one out and given reason for your answer from ammonia, sulphur dioxide, hydrogen chloride, carbon dioxide

Answer 1

ammonia as it is the only one which is an element and others are mixtures of two elements

Answer 2

The odd one out of the above compounds is Ammonia ($NH_{3}$).

• That is because out of all the compounds, Sulphur dioxide ($SO_{2}$), Hydrogen chloride which is hydrochloric acid, carbon dioxide   $CO_{2}$ are acidic.
• But Ammonia ($NH_{3}$) is the only compound that is basic.
• Hence, Ammonia is the odd compound in all other acidic compounds.