nursing AIIMS BSc Nursing 2025 Mock Test Series Chemistry Hydrogen Hydrogen and its Hydrides

निम्नलिखित में से कौन सा समीकरण H2O2 की अपचायक प्रकृति को दर्शाता है?

1
2[Fe(CN)6]4- + 2H+ + H2O2 → 2[Fe (CN)6]3- + 2H2O
2
I2 + H2O2 + 2OH- → 2I- + 2H2O + O2
3
Mn2+ + H2O2 → Mn4+ + 2OH-
4
PbS + 4H2O2 → PbSO4 + 4H2O
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