Question
- Give three points of difference between lanthanoids and actinoids.
- Give reason and select one atom/ion which will exhibit asked property:
- Sc3+ or Cr3+ (Exhibit diamagnetic behaviour).
- Cr or Cu (High melting and boiling point).
| S. No. | Lanthanoids | Actinoids |
| 1. | Most of them are not radioactive. | All are radioactive. |
| 2. | Don’t show a wide range of oxidation state. | Show a wide range of oxidation states. |
| 3. | Most of their ions are colourless. | Most of their ions are coloured. |
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
| | Column I | | Column II |
| i. | Lead storage battery | a. | Maximum efficiency. |
| ii. | Mercury cell | b. | Prevented by galvanisation. |
| iii. | Fuel cell | c. | Gives steady potential. |
| iv. | Rusting | d. | Pb is anode, PbO2 is cathode. |
| Experiment | $[ A ] / mol L ^{-1}$ | $[ B ] / mol L ^{-1}$ | Initial rate of formation of D $/ mol L ^{-1} min^{-1}$ |
| I | 0.1 | 0.1 | $6.0 \times 10^{-3}$ |
| II | 0.3 | 0.2 | $7.2 \times 10^{-2}$ |
| III | 0.3 | 0.4 | $2.88 \times 10^{-1}$ |
| IV | 0.4 | 0.1 | $2.40 \times 10^{-2}$ |