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Q.

I. Rusting of iron is an example of corrosion but tarnishing of sodium metal is not.II. Covering the surface with bis - phenol protect iron from rusting.III. Sn and Zn are used to protect iron from rusting.    True statements are

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a

I and II

b

I and III

c

II and III

d

I, II and III

answer is C.

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Tarnishing of Na is example of corrosion
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I. Rusting of iron is an example of corrosion but tarnishing of sodium metal is not.II. Covering the surface with bis - phenol protect iron from rusting.III. Sn and Zn are used to protect iron from rusting.    True statements are