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Rishab has arranged the following set-up...

Rishab has arranged the following set-ups to study the process of rusting.

Iron nail will rust in test tubes

A

(ii) and (iii) only

B

(i) and (ii) only

C

(iii) and (iv) only

D

(i) and (iv) only.

Text Solution

Verified by Experts

The correct Answer is:
D
Iron nail will rust in test tubes (i) and (iv) only.
In test tube (i), rusting occurs in the presence of aqueous solution of sodium chloride.
In test tube (ii), rusting does not take place as aluminium is more reactive than iron and thereby prevents iron from rusting. In test tube (iii), rusting does not take place as water is not present.
In test tube (iv), rusting takes place as iron is more reactive than copper and hence copper will not prevent iron from rusting.
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