InterviewSolution
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InterviewSolution
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The reaction between `Cr_(2)O_(7)^(2-)` and `HNO_(2)` in an acidic medium is `Cr_(2)O_(7)^(2-) + 5H^(o+) + 3HNO_(2) rarr 2Cr^(3+) + 3NO_(3)^(ɵ) + 4H_(2)O`. The rate of disappearance of `Cr_(2)O_(7)^(2-)` is found to be `2.4 xx 10^(-4) mol L^(-1) s^(-1)` during measured time interval. What will be the rate of disappearance of `HNO_(2)` during the same time interval?A. `2.4xx10^(-4)`B. `7.2xx10^(-4)`C. `4.8xx10^(-4)`D. `0.8xx10^(-4)` |
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Answer» Correct Answer - B Rate `= (-d[Cr_(2)O_(7)^(2-)])/(dt) = (1)/(3) (-d[HNO_(2)])/(dt)` or `(d[HNO_(2)])/(dt) = (3d[Cr_(2)O_(7)^(2-)])/(dt)` `:. (d[HNO_(2)])/(dt) = 3 xx 2.4 xx 10^(-4) = 7.2 xx 10^(-4)` |
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