MCQ
Most reactive compound toward $S_{N^1}$ is
- A

- B

- C

- ✓







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If $(n=4)$ then di-carboxylic acid. would be known as
| LIST-I (Complex/Species) | LIST-II (Shape & magnetic moment) | ||
| A. | $\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]$ | I. | Tetrahedral, 2.8 BM |
| B. | $\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}$ | II. | Square planar, 0 BM |
| C. | $\left[\mathrm{NiCl}_{4}\right]^{2-}$ | III. | Tetrahedral, 0 BM |
| D. | $\left[\mathrm{MnBr}_{4}\right]^{2-}$ | IV. | Tetrahedral, 5.9 BM |