Out of the following, the species that can act as both oxidising as well as reducing agent is/are

I. $N_{2} O_{3}$ II. $N_{2} H_{4}$

III. $F e S O_{3}$ IV. $H_{4} P_{2} O_{6}$

V. $H_{2} S_{2} O_{7}$

I I, I I I a n d V o n l y

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I, I I, I I I a n d I V o n l y

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I I I, I V a n d V o n l y

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I a n d I I I o n l y

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Solution

The correct option is B $I, I I, I I I a n d I V o n l y$

${N - -}_{2} O_{3}$ $+ 3$

${N - -}_{2} H_{4}$ $- 2$

$F e S - - O_{3}$ $+ 3$

$H_{4} {P - -}_{2} O_{6}$ $+ 4$

$H_{2} {S - -}_{2} O_{7} + 6$

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