| List-$I$ (संकुल) | List-$II$ (रंग) |
| $A. [Ni(en)_3]^{2+}$ | $I. \text{हरा}$ |
| $B. [Ni(H_2O)_4(en)]^{2+}$ | $II. \text{नीला}$ |
| $C. [Ni(H_2O)_6]^{2+}$ | $III. \text{हल्का नीला}$ |
| $D. [Ni(H_2O)_2(en)_2]^{2+}$ | $IV. \text{बैंगनी}$ |
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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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