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An element Z has atomic number 16. Answe...

An element Z has atomic number 16. Answer the following questions on Z:
State the period and group to which z belongs.

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ICSE-SELF ASSESSMENT PAPER 2 -SECTION-II
  1. A compound has the following percentage composition by mass: carbon 14...

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  2. The relative molecular mass of this compound is 168, so what is its mo...

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  3. An element Z has atomic number 16. Answer the following questions on ...

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  4. An element Z has atomic number 16. Answer the following questions on ...

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  5. An element Z has atomic number 16. Answer the following questions on ...

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  6. An element Z has atomic number 16. Answer the following questions on Z...

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  7. Three different electrolytic cells A, B and C are connected in separat...

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  8. Here is an electrode reactin : Cu to Cu^(2+)+2e At which electro...

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  9. A solution contains magnesium ions (Mg^(2+)) ,iron (II) ions (Fe^(2+))...

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  10. Give reason why? The blue colour of the Copper sulphate solution per...

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  11. Give reason why? It is dangerous to dilute the acid by adding water ...

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  12. Give reasons why? Alkali metals are good reducing agent.

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  13. Give reason why? Sugar solutions do not conduct electricity.

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  14. Give reason why? Conc. H(2)SO(4) is not a drying agent for H(2)S?

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  15. Give a balanced chemical equations for the action of sulphuric acid on...

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  16. Give two industrial uses of sulphuric acid.

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  17. What happens when conc. sulphuric acid is added to a lump of blue Vitr...

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  18. Explain why only all glass apparatus should be used for the preparatio...

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  19. Write a chemical equation to illustrate the acidic nature of nitric ac...

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  20. Equation for the reaction when compound A is bubbled through bromine d...

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