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What would you observe in the following ...

What would you observe in the following ? Sugar crystals are added to a hard glass test tube containing concentrated sulphuric acid.

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Sugar crystals first turn brown then to a black spongy mass. Steam is also evolved.
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ICSE-CHEMISTRY 2011-SECTION-II
  1. What would you observe in the following ? Sugar crystals are added to ...

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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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