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A sample of cold river water does not ea...

A sample of cold river water does not easily give lather with soap, but on boiling it does. Evaluate and write the chemical equation involved

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A sample of cold river water does not easily give lather with soap, but on boiling it does. In some cases the water does not give ready lather even if it is boiled. Why?

A sample of river water does not give lather with soap easily when it is cold, but on heating gives ready lather with soap. Why?

Soap does not give lather with hard water. Why?

Hard water does not give ready leather with soap. Suggest one method to remove hardness.

Hard water does not give ready leather with soap. What is the reason for hardness?

Hard water does not give ready leather with soap. What are the two types of hardness?

Certain samples of water do no produce easy lather with soap. What is this condition of water called?

Certain samples of water do no produce easy lather with soap. Suggest two methods to change this condition of water

Write reason for the following: Soft water lathers with soap but not hard water.

Certain samples of water do no produce easy lather with soap. What are the problems caused by this condition of water?

MAXIMUM PUBLICATION-Hydrogen-EXERCISE
  1. Dihydrogen is relatively inert at room temperature . Give reason.

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  2. Write any two uses of hydrogen.

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  3. A sample of cold river water does not easily give lather with soap, bu...

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  4. A sample of cold river water does not easily give lather with soap, bu...

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  5. Hydrogen has three isotopes - Protium. Deuterium and Tritium : Of thes...

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  6. Hydrogen has three isotopes - Protium. Deuterium and Tritium : Name a ...

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  7. Hydrogen has three isotopes - Protium. Deuterium and Tritium : Make a ...

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  8. What are the three types of hydrides? Give examples for each.

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  9. What is meant by amphoteric nature of water?

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  10. What are the advantages of dihydrogen as a fuel?

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  11. What are the disadvantages of using dihydrogen as a fuel?

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  12. What is meant by the term 'hydrogen economy?

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  13. Write a method for the preparation of H2O2

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  14. What is 100 volume H2O2

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  15. Draw the structure of H2O2 in gas phase.

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  16. lon exchange process is commonly employed for large scale production o...

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  17. lon exchange process is commonly employed for large scale production o...

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  18. What is heavy water? Mention one use of heavy water.

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  19. Explain why hydrogen peroxide is not stored in glass vessels.

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  20. What is calgon? What is its use?

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