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| 1. |
The oxidation number of hyrogen is (i) `0` (ii) ` +1` (iii) ` -1` (iv) `+ 1` only. |
| Answer» (iii) `K^(o+)[Co(CO)_4]^(ɵ)`. Therefore, `x+0=-1orx=-1` Hence (iii) is the correct option. | |