P-Block Elements Boron & Carbon Family Test Online MCQs

1. 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:

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

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

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

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

6. The commercial salt is purified by passing

7. Largest difference in radii is found in case of the pair

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

9. Nitrolium is:

10. Which one of the following alkaline earth metals shows some anomalous behavior and has same electro negativity as aluminium?

11. The first ionization potential is maximum for:

12. 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:

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

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

15. Sodium carbonate is soluble in water because of