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JEE Main
Exam
JEE Main
Subject
Chemistry
Chapter
Practical Chemistry

JEE Main · Chemistry · Practical Chemistry

The colour of CuC r _ 2 O _ 7 solution in water is green because

The colour of CuCr2O7CuC{r}_{2}{O}_{7} solution in water is green because

Options

  1. ACr2O72−C{r}_{2}{O}_{7}^{2 -} ions are green
  2. BCu++Cu^{+ +} ions are green
  3. CBoth ions are green
  4. DCu++Cu^{+ +} ions are blue and Cr2O72−C{r}_{2}{O}_{7}^{2 -} ions are orange

Correct answer

D. Cu++Cu^{+ +} ions are blue and Cr2O72−C{r}_{2}{O}_{7}^{2 -} ions are orange

Step-by-step solution

Cu++Cu^{+ +} ions are blue and Cr2O7−−C{r}_{2}{O}_{7}^{- -} ions are orange, orange and blue combination gives-green colour.
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