P-Block Elements Boron & Carbon Family Test Online MCQs

1. Among the following components of cement which is present in highest amount?

2. A metal salt solution forms a yellow precipitate with potassium chromate in acetic acid, a white precipitate with dil H₂SO₄, but gives no precipitate with NaCl. The metal salt solution will consist of:

3. One g equimolecular mixture of Na₂CO₃ and NaHCO₃ is reacted with 0.1 N HCl. The mL of 0.1 N HCl required to react completely with the above mixture is:

4. On dissolving moderate amount of sodium metal in liquid NH₃ at low temperature, which one of the following does not occur?

5. Which property of sodium is being used in street lights?

6. The commercial salt is purified by passing

7. An inorganic compound which on heating first melt, then solidifies and liberates a gas, is

8. The pair whose both species are used in ant-acid medicinal preparations is:

9. The first ionization potential is maximum for:

10. Which one of the following hydroxide is insoluble in water?

11. The correct sequence of increasing melting points of BeCI₂, MgCI₂, CaCI₂, SrCI₂ and BaCI₂ is

12. Chemical A is used for softening of water to remove temporary hardness. A reacts with sodium carbonate to produce caustic soda.
When CO₂ is bubbled through ‘A’, it turns cloudy, Chemically ‘A’, is:

13. Nitrolium is:

14. The molecular formula of Plaster of paris is:

15. Na₂CO₃ reacts with SO₂ in alkaline medium to form: