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What is rust ? Write the chemical formul...

What is rust ? Write the chemical formula.

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(i) Due to moisture and various components of atmosphere, oxidation of iron takes place.
(ii) A certain type of reddish coloured solid layer collects on the iron surface. This layer is called rust.
(iii) The chemical formula is ` Fe_(2) O _(3). xH_(2)O.`
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CHETAN PUBLICATION-CHEMICAL REACTIONS AND EQUATIONS-ANSWER THE FOLLOWING
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  3. What is rust ? Write the chemical formula.

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  5. What are the factors on which the rate of thermionic emission depends?

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  7. What is thermo chemical reactions?

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  8. When carbon dioxide is passed through lime water

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  9. Complete the following reactions Na(2)B(4)O(7)+H(2)SO(4)+H(2)O to

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  12. what's happened when Zinc dust is added to copper sulphate solution.?

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  13. Which is the oxidant used to purification of drinking water?

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  14. Why is potassium permangante used for cleaning of water tanks ?

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  16. What is the reaction called when oxidation and reduction take place si...

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  17. Write the reaction of formation of Fe ^(2+) by the reduction Fe^(3+) b...

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  18. State two conditions necessary for rusting of iron.

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  19. Define the term : solution .

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  20. In terms of chemistry what happens actually , when a molecule is oxidi...

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