WBJEE · Chemistry · d and f Block Elements
When \(\mathrm{H}_{2} \mathrm{O}_{2}\) is shaken with an acidified solution of \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) in the presence of ether, the cthereal layer turns blue due to the formation of
- A \(\mathrm{Cr}_{2} \mathrm{O}_{3}\)
- B \(\mathrm{CrO}_{4}^{2-}\)
- C \(\mathrm{Cr}_{2}\left(\mathrm{SO}_{4}\right)_{3}\)
- D \(\mathrm{CrO}_{5}\)
Answer & Solution
Correct Answer
(D) \(\mathrm{CrO}_{5}\)
Step-by-step Solution
Detailed explanation
\(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}+\mathrm{H}_{2} \mathrm{SO}_{4}+4 \mathrm{H}_{2} \mathrm{O}_{2} \rightarrow\) \(\mathrm{K}_{2} \mathrm{SO}_{4}+5 \mathrm{H}_{2} \mathrm{O}+2 \mathrm{CrO}_{5}\)
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