1
NEET 2026
MCQ (Single Correct Answer)
+4
-1
$$ \text { Match List I with List II : } $$
| List I (Transition metal/compound/ complex) |
List II (Catalytic Role) |
||
|---|---|---|---|
| A. | $$\mathrm{V}_2 \mathrm{O}_5$$ | I. | Preparation of ammonia from $\mathrm{N}_2 / \mathrm{H}_2$ mixture |
| B. | Fe | II. | Polymerisation of alkynes |
| C. | $\mathrm{PdCl}_2$ | III. | Preparation of $\mathrm{H}_2 \mathrm{SO}_4$ and $\mathrm{SO}_2$ |
| D. | Ni complex | IV. | Oxidation of ethyne to ethanal |
2
NEET 2026
MCQ (Single Correct Answer)
+4
-1
Although +3 oxidation state is most common in lanthanoids, cerium still shows +4 oxidation state because:
3
NEET 2026
MCQ (Single Correct Answer)
+4
-1
The calculated 'spin-only' magnetic moment $\mathrm{Ti}^{2+}\left(3 \mathrm{~d}^2\right)$ is :
4
NEET 2025
MCQ (Single Correct Answer)
+4
-1
Match List - I with List - II.
| List - I | List - II | ||
|---|---|---|---|
| A | Haber process | I | Fe catalyst |
| B | Wacker oxidation | II | $\mathrm{PdCl}_2$ |
| C | Wilkinson catalyst | III | $\left[\left(\mathrm{PPh}_3\right)_3 \mathrm{RhCl}\right]$ |
| D | Ziegler catalyst | IV | $\mathrm{TiCl}_4$ with $\mathrm{Al}\left(\mathrm{CH}_3\right)_3$ |
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