The compound that can work both as an oxidising and reducing agent is___________.

K M n O_{4}

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H_{2} O_{2}

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B a O

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K_{2} {C r}_{2} O_{7}

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Solution

The correct option is B $H_{2} O_{2}$
Solution
A compound is oxidising and reducing agent when its oxidation no. can increase and decrease as well.
Here
In $H_{2} O_{2}$
O have oxidation no. = -1
O can have oxidation no.=0 in oxygen gas molecule and
O can have oxidation no.=+1 in water molecule.
Therefore $H_{2} O_{2}$ can be both oxidising and redicing agent.
The correcr option is B

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