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Q.

The following reaction shows the reducing action of H2O2

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a

PbS + 4H2O2 → PbSO4 + 4H2O

b

2I–+ 2H+ + H2O2 → I2 + 2H2O

c

H2O2 + HOCl → H2O + HCl + O2

d

K2Cr2O7 + H2SO4 + 4H2O2 → K2SO4 + 2CrO5 + 5H2O

answer is C.

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Detailed Solution

⇒⇒⇒⇒⇒ In reaction 1&2 the H2O2 acts as oxidising agent⇒ In reaction "3" H2O2 acts as reducing agent⇒ In reaction "4" H2O2 neither acts as oxidising agent(O.A) or reducing agent (R.A).
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