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| $[Ni(H_2O)_6]^{2 } : en$ मोलर अनुपात | उत्पाद का रंग |
|---|---|
| $A. 1:1$ | $I. {\text{हल्का नीला}}$ |
| $B. 1:2$ | $II. {\text{नीला}/\text{बैंगनी}}$ |
| $C. 1:3$ | $III. {\text{बैंगनी}}$ |
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