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State one appropriate observation for ea...

State one appropriate observation for each of the following:
Copper sulphide is treated with dilute hydrochloric acid.

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Rotten egg smell of hydrogen sulphide gas will be given out. Hydrogen sulphide gas will be given out which smells like rotten eggs and turns moist blue litmus paper red.
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ICSE-CHEMISTRY-2013-SECTION-II (40 Marks)
  1. State one appropriate observation for each of the following: Copper...

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  2. • In this table H does not represent hydrogen. • Some elements are ...

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  3. In this table H does not represent hydrogen. Some elements are given...

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  4. • In this table H does not represent hydrogen. • Some elements are ...

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  5. • In this table H does not represent hydrogen. • Some elements are ...

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  6. • In this table H does not represent hydrogen. • Some elements are ...

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  7. • In this table H does not represent hydrogen. • Some elements are ...

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  8. • In this table H does not represent hydrogen. • Some elements are ...

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  9. Compare the compounds methane and sodium chloride with regard to solub...

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  10. Choosing the substances from the list given below, write balanced chem...

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  11. Choosing the substances from the list given below, write balanced chem...

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  12. Choosing the substances from the list given below, write balanced chem...

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  13. Write balanced chemical equations for the reactions which would be use...

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  14. State two relevant observation Ammonium hydroxide solution is added ...

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  15. State two relevant observation Ammonium hydroxide solution is added...

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  16. State two relevant observation Lead nitrate crystals are heated in a...

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  17. Copper sulphate solution is electrolysed using copper electrodes. Stud...

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  18. Copper sulphate solution is electrolysed using copper electrodes. Stud...

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  19. Copper sulphate solution is electrolysed using copper electrodes. Stud...

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  20. Using the information above, complete the following: .......... is ...

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  21. Using the information above, complete the following: Metal atoms te...

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