1. Take some toilet cleaner or disinfectant or cloth whitener containing sodium hypochlorite in a beaker or ceramic bowl.
2. Keep woolen and silk fibres in the toilet cleaner and observe for 20 minutes.
3. Repeat the same experiment with plant and synthetic fibres.
Observations :
1. Woolen and silk fibres dissolved in sodium hypochlorite. If not they are not pure woolen or silk fibres.
2. Plant and synthetic fibres do not dissolved in bleach.
Inference :
Animal fibres dissolve in bleach plant and synthetic fibres do not dissolve in bleach (sodium hypochlorite).
