The reagent that gives an orange coloured ppt. with acetaldehyde

AgNO_3 gives red ppt. with.

Schiff reagent gives pink colour with

Methyl orange gives red colour in

DMG gives a rosy red crystalline ppt with

Which reagent gives pink colour with aldehyde ?

Give the biological terms for each of the following: The plastids which give red and orange colour to fruits and flowers.

What is the formula of chocolate coloured ppt ?