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Directions: Questions No. 64 are based on the following paragraph. When ammonium vanadate is heated with oxalic add solution, a compound Z is formed. A sample of Z was titrated with\[KMn{{O}_{4}}\] solution in hot acidic solution. The resulting liquid was reduced with \[S{{O}_{2}}\], the excess \[S{{O}_{2}}\]boiled off, and the liquid again titrated with \[KMn{{O}_{4}}\]. The ratio of the volumes of \[KMn{{O}_{4}}\] used in the two titrations was 5 : 1. \[KMn{{O}_{4}}\] oxidises all oxidation state of vanadium to Vanadium (+V) and \[S{{O}_{2}}\] reduces vanadium (+V) to vanadium (+IV). Read the above experiment and answer the following questions. Consider following redox reaction\[VO_{3}^{2-}+MnO_{4}^{-}\to M{{n}^{2+}}+VO_{4}^{3-}\]1 mole of\[VO_{3}^{2-}\] is oxidised by x mole of\[MnO_{4}^{-}\] Thus, x is

A)  0. 2                                       

B)  0. 4

C)  0. 8                                       

D)  1. 0