Presence of CO $_{2}$ in natural water facilitate rusting of iron.

If true enter 1, else enter 0.

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Solution

Presence of $C O_{2}$ in natural water facilitate rusting of iron.
$C O_{2}$ from the atmosphere, reacts with water to form carbonic acid.
$C O_{2} + H_{2} O \to H_{2} C O_{3}$
Carbonic acid provides protons which are necessary for the oxidation of Fe to $F e^{2 +}$ and further oxidation to $F e^{3 +}$

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