Question 9
Explain how the painting of an iron gate prevents it from rusting.

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Solution

Rust forms when iron or its alloys are exposed to moist air. The oxygen and water in the air react with the iron metal to form the hydrated oxide( $F e_{2} O_{3} . x H_{2} O$ ). The oxygen needs moisture as a catalyst and reactant to accelerate the reaction, so in the absence of moisture, iron won't rust. The essential component for rusting is the contact of metal with oxygen and moisture. When the iron gate is painted, it protects the iron from getting in contact with oxygen and moisture. Hence, prevents it from rusting.

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Similar questions

(a) What is rust? Give the equation for the information of rust.

(b) State two conditions necessary for rusting of iron?

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

Question 5

A man painted his main gate made up of iron, to

(i) prevent it from rusting.
(ii) protect it from the sun.
(iii) make it look beautiful.
(iv) make it dust free.

Which of the above statement(s) is/are correct?
(a) (i) and (ii)
(b) (ii) and (iii)
(c) only (ii)
(d) (i) and (iii)

Q. For prevention of rusting of iron which of the following is used in paints?

Q. (a) How does the painting of an iron object prevent its rusting?
(b) How does the electrical conductivity of copper alloys, brass and bronze, differ from that of pure copper?
(c) What is meant by 22 carat gold? Name the metals which are usually alloyed with gold to make it harder.

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Question 9 Explain how the painting of an iron gate prevents it from rusting.

Question 9
Explain how the painting of an iron gate prevents it from rusting.