CUET · CHEMISTRY · PYQ PAPER 2023
The number of electrons gained by dichromate ions in acidic medium is :
- A 2
- B 3
- C 4
- D 6
Answer & Solution
Correct Answer
(D) 6
Step-by-step Solution
Detailed explanation
Oxidation state of Cr in \(\text{Cr}_2\text{O}_7^{2-}\): \(2x + 7(-2) = -2 \Rightarrow x = +6\) Oxidation state of Cr in \(\text{Cr}^{3+}\): \(+3\) Change in oxidation state for 2 Cr atoms: \(2 \times (+6) \rightarrow 2 \times (+3)\) Electrons gained:…
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