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NEET · Chemistry · STD 11 - 7. Redox reactions

अम्लीय माध्यम में \(H _{2} O _{2}, Cr _{2} O _{7}^{-2}\) को \(CrO _{5}\) जिसमें कि दो \((- O - O )\) आबन्ध है में परिवर्तित करता है। \(CrO _{5}\) में \(Cr\) की ऑक्सीकरण अवस्था है

  1. A \(+5\)
  2. B \(+3\)
  3. C \(+6\)
  4. D \({-10}\)
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Answer & Solution

Correct Answer

(C) \(+6\)

Step-by-step Solution

Detailed explanation

When \(H_{2} O_{2}\) is added to an acidified solution of a dichromate \(C r_{2} O_{7}^{2-},\) a deep blue coloured complex, chromic peroxide \(C r O_{5}\left[o r C r O\left(O_{2}\right)_{2}\right]\) is formed. \(C r_{2} O_{7}^{2-}+2 H^{+}+4 H_{2} O_{2} \rightarrow\)\(\underbrace{2 C r O\left(O_{2}\right)_{2}}_{\text {Chromic peroxide }}+5 H_{2} O\) This deep blue coloured complex has the following structure
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