Question

Smell of freshly cut onion is not detectable when HCl is added to it.

• A. True
• B. False

Answer 1

The correct option is B False

Indicators that change its odour in acidic or basic solution are called olfactory indicators. For example: onion, clove oil, vanilla essence, etc.

Smell of onions is detectable in acidic solutions but not in basic solutions. So, the smell of freshly cut onion on adding HCl (hydrochloric acid) is detectable.