TS EAMCET · Chemistry · Redox Reactions
The weight of potassium dichromate (molecular weight \(=294\) ) required to prepare \(0.04 \mathrm{~N}\) of \(250 \mathrm{~mL}\) solution is
- A \(2.94 \mathrm{~g}\)
- B \(29.4 \mathrm{~g}\)
- C \(0.98 \mathrm{~g}\)
- D \(0.49 \mathrm{~g}\)
Answer & Solution
Correct Answer
(D) \(0.49 \mathrm{~g}\)
Step-by-step Solution
Detailed explanation
\(\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7\) mostly react in acidic medium as oxidising agent. The reaction occurs as follows : \(\mathrm{Cr}_2 \mathrm{O}_7^{2-}+7 \mathrm{H}^{+}+6 e^{-} \longrightarrow 2 \mathrm{Cr}^{3+}+7 \mathrm{H}_2 \mathrm{O}\) \(\because\) Reaction involve…
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