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Chemistry · PYQ NEET UG 2023
हिन्दीOn balancing the given redox reaction, \( a \text{ Cr}_2\text{O}_7^{2-} + b \text{ SO}_3^{2-} (\text{aq}) + c \text{ H}^+ (\text{aq}) \rightarrow \) \( 2a \text{ Cr}^{3+} (\text{aq}) + b \text{ SO}_4^{2-} (\text{aq}) + \frac{c}{2} \text{ H}_2\text{O} (\ell) \) the coefficients \( a \), \( b \) and \( c \) are found to be, respectively -
Correct answer · Option 3
1, 3, 8
Explanation
Balancing the ion-electron equation for \( \text{Cr}_2\text{O}_7^{2-} + 3\text{SO}_3^{2-} + 8\text{H}^+ \rightarrow 2\text{Cr}^{3+} + 3\text{SO}_4^{2-} + 4\text{H}_2\text{O} \), gives coefficients a=1, b=3, c=8.
