The colour of ${\rm{CuC}}{{\rm{r}}_2}{{\rm{O}}_7}$ solution in water is green because:

${\rm{C}}{{\rm{u}}^{2 + }}$ ion is blue and ${\rm{C}}{{\rm{r}}_2}{\rm{O}}_7^{2 - }$ ion is yellow

${\rm{C}}{{\rm{u}}^{2 + }}$ ions is green

${\rm{C}}{{\rm{r}}_2}{\rm{O}}_7^{2 - }$ ion is green

NEET UG CHEMISTRY MCQ: d & f- BLOCK ELEMENTS

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Understanding +4 | -1

The colour of

\mathrm{CuC}{\mathrm{r}_2}{\mathrm{O}_7}

solution in water is green because:

View answer and explanation

Correct option: D

\mathrm{C}{\mathrm{u}^{2 + }}

ion is blue and

\mathrm{C}{\mathrm{r}_2}\mathrm{O}_7^{2 - }

ion is yellow

The green color of

\mathrm{CuC}{\mathrm{r}_2}{\mathrm{O}_7}

solution is due to the combination of blue

\mathrm{C}{\mathrm{u}^{2 + }}

ions and yellow

\mathrm{C}{\mathrm{r}_2}\mathrm{O}_7^{2 - }

ions.