Silk bleaching with process

Boil a second piece of dyed silk in a solution of chlorine water. (7) What effect was produced on the color (8) Was the strength of the fiber of the cloth effected Rinse the cloth under the tap and boil it in the solution of potassium chlorate. (9) Was the color restored (10) To what class of reactions does the bleaching process belong (11) What advantage does it possess over bleaching with sulphur dioxide ... 

The ancient process of stoving is stiU occasionally used to bleach wool and silk with sulfur dioxide. In this process, wet fabrics are hung in chambers of burning sulfur or sulfur dioxide gas for at least 8 h. The fabrics are then washed with sodium sulfite to remove excess sulfur dioxide. Fabric so treated may have unpleasant odors, and the original color eventually returns, but the process is simple and inexpensive. 

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