Bleaching Powder
Bleaching powder is a chlorine-based compound used for bleaching and for disinfecting water.
Practice This ConceptMain explanation
Teacher explanation
Bleaching powder is an important household and municipal chemical. It is used to bleach cotton, linen, and wood pulp, and it is also used to disinfect drinking water. Its action is linked to chlorine release under suitable conditions. It should be stored in a dry, tightly closed container because moisture reduces its strength.
Example
A water tank may be treated with bleaching powder to kill germs and make the water safer for use.
Simple analogy
Bleaching powder: white cloths, safe water.
Common confusion
Students often think bleaching powder is the same as ordinary detergent or liquid bleach. It is a different chemical with specific uses.
Exam tip
For board answers, mention both uses: bleaching and disinfection. Also mention dry storage to keep it effective.
Answer writing and exam use
1-mark use
Write the exact meaning of bleaching powder in one clean line.
2-mark use
Define bleaching powder and add one example or condition.
3-mark use
Explain bleaching powder, show the method or example, and mention the common mistake.
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