Which of the following is/are NOT use(s) of washing soda?
(i) Manufacture of glass, soap and paper
(ii) In soda-acid fire extinguisher
(iii) For removing permanent hardness of water

Correct option is B

The correct option is (B) Only (ii)

Information booster:

• Chemical Name: Washing soda is chemically known as sodium carbonate decahydrate (Na₂CO₃·10H₂O).
• Uses:
  • Commonly used in laundry as a cleaning agent to soften hard water.
  • Helps remove tough stains like grease, oil, and wine.
  • Used in the production of glass, detergents, and paper.
  • Acts as a pH regulator in various chemical industries.
• Physical Properties:
  • Appears as white crystalline powder.
  • Highly soluble in water.
  • Has a strong alkaline nature.
• Preparation: Produced by the Solvay process using raw materials like salt (sodium chloride) and limestone (calcium carbonate).
• Environmental Role: Considered eco-friendly compared to some synthetic cleaning agents.
• Precautions:
  • Can cause skin irritation, so gloves are recommended during handling.
  • Should be stored in a dry place to prevent it from absorbing moisture.