P-Block Elements Boron & Carbon Family Test Online MCQs

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

2. 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:

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

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

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

6. 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:

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

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

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

10. Nitrolium is:

11. The molecular formula of Plaster of paris is:

12. 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:

13. The commercial salt is purified by passing

14. Sodium on heating with moist air produces

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