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Give reasons for the following Hydroge...

Give reasons for the following
Hydrogen is kept in I A group of the periodic table.

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ICSE-SPECIMEN PAPER 2-SECTION -II
  1. Give reasons for the following Hydrogen is kept in I A group of the ...

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  2. Give reasons : Sodium is kept in an inert solvent.

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  3. Give reasons : Hydrogen is collected by downward displacement of wat...

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  4. Give reasons : Hydrogen is not prepared by reacting conc H(2)SO(4) w...

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  5. Give reasons : Conc. sulphuric acid is used as drying agent.

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  6. Give reasons : Detergents are better than soap.

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  7. Give the test of the gas evolved when dilute sulphuric acid is added t...

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  8. Give the test of the gas evolved when dilute sulphuric acid is added t...

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  9. Give the test of the gas evolved when dilute sulphuric acid is added t...

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  10. Give the test of the gas evolved when dilute sulphuric acid is added t...

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  11. Give an example of a reaction where heat is released.

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  12. Name the substances responsible for permanent hardness

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  13. Explain one method of removing permanent hardness.

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  14. Complete the table by writing the following as basic and acidic radica...

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  15. State the cause of acid rain and mention its impact.

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  16. Explain why : Fused CaCl2 or conc. H2SO4 is used in a desiccator.

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  17. Explain why? conc. sulphuric acid should be stoppered.

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  18. Write balanced equations for the following reactions. Water is react...

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  19. Write balanced equations for the following reactions. Steam is passe...

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  20. Write balanced equations for the following reactions. Ammonium dichr...

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  21. Write balanced equations for the following reactions. Lead reacts wi...

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