Why chloroform is to be kept in a dark bottle in absence of air?

Why Chloroform is preserved in dark coloured glass bottle?

Why do acids not show acidic behaviour in the absence of water?

Why is the colour of a leaf kept in the dark frequently yellow, or pale green? Which pigments do you think is more stable?

Why is sodium kept immersed in kerosene oil?

A blackish brown coloured solid 'A' when fused with alkali metal hydroxides in presence of air, produces a dark green coloured compound 'B' which on electrolytic oxidation in alkaline medium gives a dark purple coloured compound 'C' Identify A, B and C and write the reactions involved.

Why NO become brown when exposed in air?

Explain why does drinking water kept in an earthern pot cool down ?