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The following questions relate to the ex...

The following questions relate to the extraction of aluminium by electrolysis :
Explain why is it necessary to renew the anode periodically.

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During electrolysis oxygen gas is formed at anode which oxidises graphite or carbon anode to carbon dioxide, so it is necessary to replace anode periodically.
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ICSE-CHEMISTRY-2013-SECTION-II (40 Marks)
  1. The following questions relate to the extraction of aluminium by elect...

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  2. The following questions relate to the extraction of aluminium by elect...

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  3. The following questions relate to the extraction of aluminium by elect...

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  4. Give balanced chemical equation for the preparation of the following o...

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  5. Give balanced equations for the laboratory preparations of butene from...

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  6. Give balanced equations for the laboratory preparations of the organi...

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  7. Give balanced equations for the laboratory preparations of. i] A satu...

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  8. Give the structural formula of each of the isomer of butane

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  9. Give the structural formulae for the following An isomer of n-butane...

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  10. Draw the structural formula for the diethyl ether

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  11. Give reasons for Methane does not undergo addition reactions, but et...

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  12. Give reasons for the following : (i) Methane does not undergo addit...

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  13. Give reasons why? Hydrocarbons are excellent fuels.

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  14. O(2) is evolved by heating KClO(3) using MnO(2) as a catalyst 2KClO(...

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  15. O(2) is evolved by heating KClO(3) using MnO(2) as a catalyst 2KClO(...

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  16. O(2) is evolved by heating KClO(3) using MnO(2) as a catalyst 2KClO(...

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  17. Identify the following substance which is underlined: An <u>alkaline g...

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  18. Identify the following substance which is underlined: An acid which is...

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  19. Identify the following substance : A gas which does not conduct elec...

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  20. Identify the following substance : A dilute mineral acid which forms a...

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