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${xCr}_{2} O_{7}^{- 2} + {ySO}_{2} + {zH}^{+} \to {pCr}^{+ 3} + {ySO}_{4}^{- 2} + H_{2} O$ .For the balanced equation sum of x,y and z is equal to

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answer is C.

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Detailed Solution

balanced equation is

${Cr}_{2} O_{7}^{- 2} + 3 {SO}_{2} + 2 H^{+} \to 2 {Cr}^{+ 3} + 3 {SO}_{4}^{- 2} + H_{2} O$

x = 1

y = 3

z = 2

sum = 6

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