Stainless steel can protect iron from rusting as it contains:

tin

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chromium

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zinc

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aluminium

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Solution

The correct option is B chromium
Stainless steel can protect the iron from rusting or corrosion as it contains high percentages (16-36%) of chromium. This element is present in sufficient quantity that when exposed to oxidizing media it forms a thin, tightly adhering, and impervious oxide layer (predominantly $C r O$ ) that stops further corrosion.

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Similar questions

Q. Explain the following:
(i) Galvanisation protects iron from rusting.
(ii) Stainless steel is more useful than steel.
(iii) Aluminium is extensively used for making aircraft parts.
(iv) Hot water has no action on aluminium.

Q. A method of protecting steel and iron from rusting is:

Stainless steel is formed by alloying iron with nickel and chromium in order to prevent rusting of iron.

Q. Iron can be protected from rusting by coating with zinc. How does it prevent oxidation of iron?

(a) Name an alloy of copper. State its chemical composition and anyone use.
(b) Name five methods of preventing rusting of iron.
(c) What are the constituents of stainless steel? What are the special properties of stainless steel?

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