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a) What is corrosion? b) Write the eff...

a) What is corrosion?
b) Write the effects of corrosion.
c) How can prevent it ?

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2) i) Tarnishing on silver ware.
`4Ag+2H_(2)S+O_(2)rarr 2Ag_(2)S+2H_(2)O`
(Black coating (due to `Ag_(2)S`) forms on silver articles)
ii) Corrosion of copper.
`2Cu+O_(2)rarr 2CuO.`
(Treen coating (due to `CuO`) on copper)
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VGS PUBLICATION-BRILLIANT-CHEMICAL REACTIONS AND EQUATIONS-ESSENTIAL MATERIAL FOR EXAMINATION PURPOSE
  1. What are the types of chemical reactions? Give examples to each.

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  2. a) What is corrosion? Give examples.

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  3. a) What is corrosion? b) Write the effects of corrosion. c) How ca...

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  4. c) How can corrosion be prevented ?

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  5. Write an activity about how you conduct an experiment to show that mor...

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  6. Zn+2HCl rarr ZnCl(2)+H(2) a) What type of reaction is it ? b) Whic...

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  7. a) If we dip the iron nail in the solution of copper sulphate, what ch...

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  8. Give one example to chemical displacement.

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  9. N(2(g))+O(2(g))+"Heat"rarr 2NO((g)) What information do you get from...

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  10. What can be interpreting from a chemical equation ?

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  11. What information does provide a chemical equation.

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  12. Here some substances are given. Write them in a chemical equation form...

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  13. Fill the table with suitable examples.

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  14. a) Na(2)SO(4)+BaCl(2)rarr b) C+….rarr CO(2) c) Mg+2HCl rarr d) …...

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  15. a) Na(2)SO(4)+BaCl(2)rarr b) C+….rarr CO(2) c) Mg+2HCl rarr d) …...

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  16. a) Na(2)SO(4)+BaCl(2)rarr b) C+….rarr CO(2) c) Mg+2HCl rarr d) …...

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  17. a) Na(2)SO(4)+BaCl(2)rarr b) C+….rarr CO(2) c) Mg+2HCl rarr d) …...

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  18. Draw the diagram of apparatus arrangement to decompose calcium carbona...

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  19. Draw the diagram of reduction of copper oxide to copper and label it.

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  20. How do you appreciate the cemical equations?

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