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Explain one method of removing permanent...

Explain one method of removing permanent hardness.

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The reagent which is not used for removing the permanent hardness of water is :

In zeolites & synthetic resin method which will be more efficient in removing permanent hardness of water :

Describe any two methods that may be used to remove permanent hardness of water.

State two methods to remove temporary hardness.

What do you understand by hardness of water? Describe the permutit and calgon processes used to remove the permanent hardness of water.

Give an equation for the removal of permanent hardness in water.

In comparison to the zeolite process for the removal of permanent hardness, the synthetic resins method is

The Reagent which is commercially known as ‘calgon’ that is used to remove the permanent hardness of water in Calgon’s method. Find out the number of moles of calgon required to remove 12 moles of Ca^(2+) ion present in hard water.

Name a process which can remove both temporary and permanent hardness of the water.

The one that is NOT suitable for the removal permanent hardness of water is:

ICSE-SPECIMEN PAPER 2-SECTION -II
  1. Give an example of a reaction where heat is released.

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  2. Name the substances responsible for permanent hardness

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  3. Explain one method of removing permanent hardness.

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

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

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

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

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

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

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

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

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  12. Write balanced equations for the following reactions. Copper reacts ...

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  13. What are isotopes ? Draw the structures of the isotopes of hydrogen.

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  14. Compare three properties of hydrogen which resembles the alkali metals...

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  15. At what centigrade temperature will the volume of a gas at 0^(@)C trip...

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  16. Hydrogen is prepared by Bosch process ? Write the balanced equations...

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  17. Hydrogen is prepared by Bosch process ? How are the products separat...

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  18. Write the name of the product formed and give balanced equation of the...

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  19. Write the name of the product formed and give balanced equation of the...

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  20. Write the name of the product formed and give balanced equation of the...

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