Match List-I with List-II and select the correct answer using the code given below the Lists:

List I (Trade Name)		List II (Chemical Name)
A.	Bleaching powder	1.	Sodium bicarbonate
B.	Baking soda	2.	Sodium carbonate, 10 water
C.	Washing soda	3.	Calcium oxychloride
D.	Plaster of Paris	4.	Calcium sulphate, \(\frac{1}{2}\) water

The correct answer is  A - 3, B - 1, C - 2, D - 4.

Key PointsMatching Trade Names with Chemical Names

• Bleaching powder is chemically known as Calcium oxychloride.
  • It is widely used for disinfection and bleaching purposes.
  • It is represented by the formula Ca(OCl)₂.
  • It has strong oxidizing properties which make it effective for water purification.
  • Hence, statement A - 3 is correct.
• Baking soda is chemically known as Sodium bicarbonate.
  • It is commonly used in baking as a leavening agent.
  • Its chemical formula is NaHCO₃.
  • It is also used for cleaning and as a mild antacid.
  • Hence, statement B - 1 is correct.
• Washing soda is chemically known as Sodium carbonate, 10 water.
  • Its chemical formula is Na₂CO₃·10H₂O.
  • It is used in laundry detergents and for softening water.
  • It helps in removing grease, oil, and wine stains from clothing.
  • Hence, statement C - 2 is correct.
• Plaster of Paris is chemically known as Calcium sulphate, (1)/(2) water.
  • Its chemical formula is CaSO₄·1/2H₂O.
  • It is used in building materials and for making casts and molds.
  • It hardens quickly when mixed with water.
  • Hence, statement D - 4 is correct.

Additional Information

• Bleaching powder is also used in the textile industry for bleaching cotton and linen.
• Baking soda has applications in fire extinguishers due to its ability to release carbon dioxide.
• Washing soda is also used in the manufacture of glass, paper, and soaps.
• Plaster of Paris is used in the medical field for making orthopedic casts to immobilize broken bones.