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  4. The rusting of iron is catalysed by which of the following?

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Q. The rusting of iron is catalysed by which of the following?

NTA AbhyasNTA Abhyas 2022

Solution:

The rusting of iron is catalysed by $H^{+}$ (acidic medium)
$O_{2}+4H^{+}+4e^{-} \rightarrow 2H_{2}O$
The more the concentration of $H^{+}$ , the faster is the rusting of iron.