The colour of CuCr2O7 solution in water is green because:

CuSO4 is blue because Cu2+ ions are blue; CuCr2O7 is green because Cu2+ is blue and Cr2O72− is orange yellow. Thus, a solution of blue and yellow ions appears green.

The colour of CuCr2O7 solution in water is green because:

CuSO4 is blue because Cu2+ ions are blue; CuCr2O7 is green because Cu2+ is blue and Cr2O72− is orange yellow. Thus, a solution of blue and yellow ions appears green.

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The colour of CuCr₂O₇ solution in water is green because:

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Cu²⁺ ion is green

${Cr}_{2} O_{7}^{2 -}$ ion is green

both the ions are green

Cu²⁺ ion is blue and ${Cr}_{2} O_{7}^{2 -}$ ion is yellow

answer is D.

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Detailed Solution

CuSO₄ is blue because Cu²⁺ ions are blue; CuCr₂O₇ is green because Cu²⁺ is blue and ${Cr}_{2} O_{7}^{2 -}$ is orange yellow. Thus, a solution of blue and yellow ions appears green.

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