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Give reasons why? Almost 90% of all kn...

Give reasons why?
Almost 90% of all known compounds are organic in nature.

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Because in all the living world compounds are mainly made of carbon and hydrogen. And carbon has the ability to form maximum number of compounds than those of other elements put together.
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ICSE-CHEMISTRY 2011-SECTION-II
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  2. Differentiate between electrical conductivity of copper sulphate solut...

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  3. Sodium hydroxide solution is added to the solutions containing the ion...

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  4. During the electrolysis of copper (II) sulphate solution using platinu...

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  5. During the electrolysis of copper (II) sulphate solution using platinu...

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  6. During the electrolysis of copper (II) sulphate solution using platinu...

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  7. Name a metal which is found abundantly in the earth's crust.

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  8. What is the difference between calcination and roasting?

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  9. Name the process used for the enrichment of sulphide ore.

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  10. Write the chemical formulae of one main ore of iron and aluminium .

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  11. Write the constituents of electrolyte for the extraction of aluminium.

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  12. The diagram shows an experimental set up for the laboratory preparatio...

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  13. The diagram shows an experimental set up for the laboratory preparatio...

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  14. The diagram shows an experimental set up for the laboratory preparatio...

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  15. The diagram shows an experimental set up for the laboratory preparatio...

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  16. The diagram shows an experimental set up for the laboratory preparatio...

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  17. An organic compound with vapour density = 94 contains C=12.67%, H = ...

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  18. Calcuate the mass of 10^(22) atoms of sulphur. [ Atocmi mass S=32,...

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  19. Calculate the mass of 0.1 mole of carbon dioxide. [Atomic mass : S...

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  20. In the laboratory preparation of hydrochloric acid, HCl gas is dissolv...

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  21. In the laboratory preparation of hydrochloric acid, HCl gas is dissolv...

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