When the stopper of a bottle containing colourless liquid was removed, the bottle gave a smell like that of vinegar. The liquid in the bottle could be

Q. When the stopper of a bottle containing colourless liquid was removed, the bottle gave a smell like that of vinegar. The liquid in the bottle could be

1. Hydrochloric acid solution
2. Sodium hydroxide solution
3. Acetic acid solution
4. Saturated sodium bicarbonate solution

Answer: Hydrochloric acid solution