Question

Which of the following are wrong?

I.Na₂CO₃ is used in softening hard water

II.NaHCO₃ is used for bleaching cotton and linen in the textile industry

III.CaSO₄ H₂O is used for plastering fractured bones

IV.CaOCl₂ is used in the making baking powder

1. I and IV
2. II and IV
3. I and III
4. III and IV

Answer 1

Correct Answer - Option 2 : II and IV

The Correct Answer is II and IV.

• Sodium bicarbonate (NaHCO₃) is an antacid used to relieve heartburn and acid indigestion.
• Calcium Hypochlorite (CaOCl₂) is used for manufacturing chloroform, bleaching silk, and wool and it is mainly used as a bleaching agent for cotton, linen, and wood pulp.

• Sodium carbonate is the inorganic compound with the formula Na₂CO₃and its various hydrates.
• Gypsum is a common mineral, composed of calcium sulphate (CaSO₄) and water (H₂O).