Bleaching Powder - Practice Questions & MCQ

Preparation

• It is a mixture of CaCl₂ and Ca(OCl)₂.
• It is manufactured in Bachmann's plant.
• The chemical reaction for the preparation of bleaching powder is as follows:
  

Physical properties

• It is yellowish-white powder with smell of chlorine.
• Most of it is soluble in water but small amount is insoluble in lime.

Chemical properties

• Reaction with insufficient and excess dilute acid:
  
• Autoxidation: When it undergoes autoxidation, it loses its available chlorine due to which it affects its bleaching process.
  
• Catalytic decomposition: The catalytic decomposition of bleaching powder occurs as follows:
  

Uses

• It is an oxidising agent.
• It is a chlorinating agent.
• It is used as a disinfectant.
• It sterilizes water.