(a) Define olfactory indicators. Name two substances which can be used

1.	(a) Define olfactory indicators. Name two substances which can be used as olfactory indicator. (b) Choose strong acids from the following: CH3COOH, H2SO4, H2CO3, HNO3
Answer» (a) Those substances whose smell (odour) changes in acidic or basic solution are called olfactory indicators, e.g. onion and vanilla. (b) H₂SO₄ and HNO₃ are strong acids.

(a) Define olfactory indicators. Name two substances which can be used as olfactory indicator. (b) Choose strong acids from the following: CH3COOH, H2SO4, H2CO3, HNO3

Answer»

(a) Those substances whose smell (odour) changes in acidic or basic solution are called olfactory indicators, e.g. onion and vanilla.

(b) H₂SO₄ and HNO₃ are strong acids.