While I was still sitting under the sickly, drowsy influence of the drugs that decolourise blood, there came a repeated knocking at the door.

Benzene does not decolourise bromine water as other unsaturated compounds do, so neither of the structures suggested is satisfactory.

Decolourise in acid alcohol

Oxalates also decolourise KMnO and give a white precipitate with CaCl.

Ethane decolourises bromine water with the formation of 1,2-dibromoethane.This is a test for alkenes as alkanes do not decolourise bromine water.

Decolourize the solution by stirring with activated charcoal for 1 h, filter and then store it in a dark bottle at 4 C.

Special technique designed for staining true endospores with the use of malachite green dye, once stained, they do not decolourize.

Add 33 ml of a solution of potassium permanganate and muratic acid (1:1) to decolourize the mixture.