Question

Which of the following properties are common between Be and Al because of diagonal relationship?

• A. The carbonates of both the metals are unstable
• B. Salt of both do not impart color to the flame
• C. Both combine with nitrogen when strongly heated in an atmosphere
• D. All of these

Answer 1

Answer: (D)

All of these

Option $\left(D\right)$ is correct.

The following properties are common between $Be$ and $Al$ because of diagonal relationship

1. The carbonates of both the metals are unstable.

2. Salt of both do not impart color to the flame.

3. Both combine with nitrogen when strongly heated in an atmosphere.

4. Both have almost same and smaller size and thus favour for covalent bonding.

5. Both these form covalent compounds having low melting point and soluble in organic solvent.

6. Both have same value of electronegativity.

7. Both form polymeric covalent hydrides while hydrides of other alkaline earth are ionic.