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State one appropriate observation for -W...

State one appropriate observation for -When crystals of copper nitrate are heated in a test tube .

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The blue coloured copper nitrate crystals changes into black powdery residue CuO with the release of reddish brown `NO_(2)` gas.
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ICSE-CHEMISTRY-2015-SECTION-II (40 Marks) Attempt any four questions from this Section.
  1. State one appropriate observation for -When crystals of copper nitrate...

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  2. Arrange the following as per the instructions given in the brackets: ...

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  3. Arrange the following as per the instructions given in the brackets :...

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  4. Arrange the following as per the instructions given in the brackets :...

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  5. Arrange the following as per instructions given in the brackets: Cl,...

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  6. Choose the most appropriate answer from the following list of oxides w...

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  7. Choose the most appropriate answer from the following list of oxides w...

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  8. Choose the most appropriate answer from the following list of oxides w...

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  9. Choose the most appropriate answer from the following list of oxides w...

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  10. Element X is a metal with a valency 2, Y is a non metal with a valency...

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  11. A metal 'X' has valency 2 & a non - metal 'Y' has a valency 3. If 'Y' ...

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  12. Give the balanced chemical equations for the Ethanoic acid to ethyleth...

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  13. Give the balanced chemical equations for the Calcium carbide to ethyne...

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  14. Give the balanced chemical equations for the Sodium ethanoate to metha...

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  15. Using their structural formulae identify the functional group by circl...

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  16. Using their structural formulae identify the functional group by circl...

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  17. Name of the following Process by which ethane is obtained from ethen...

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  18. Name the following: A hydrocarbon which contributes towards the gre...

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  19. Name of the following Distinctive reaction that takes place when eth...

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  20. Name of the following The property of elements by virtue of which at...

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  21. Name Reaction when an alkyl halide is treated with alcoholic potass...

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