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Soap does not give lather with hard wate...

Soap does not give lather with hard water. Why?

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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?

Hard water contains calcium and magnesium salts. Therefore it does not lather with soap.Hard water is harmful for boilers. Why?

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?

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

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

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

Why do soaps not work in hard water?

Why do soaps not work in hard water?

MAXIMUM PUBLICATION-Hydrogen-EXERCISE
  1. What is the bond angle and shape of water?

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  2. Among NH3, H2O and HF which would you expect to have highest magnitude...

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  3. Soap does not give lather with hard water. Why?

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  4. What are the disadvantages of hard water?

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  5. Write one example each for the oxidising action of H2O2 in acidic medi...

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  6. Write one example each for the reducing action of H2O2 in acidic medi...

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  7. Write two examples for redox reactions involving water.

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  8. Distinguish between: Hard and Heavy water

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  9. Distinguish between : Temporary and permanent hardness of water.

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  10. Hydrogen combines with elements to give binary compounds known as hydr...

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  11. Hydrogen combines with elements to give binary compounds known as hydr...

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  12. Prepare a short note on different types of hydrides

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  13. Analyse the equation: 2Na+H2 rarr 2NaH In this chemical equation, H2 r...

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  14. Analyse the equation: 2Na+H2 rarr 2NaH Hydrogen reacts with metals ...

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  15. Analyse the equation: 2Na+H2 rarr 2NaH Hydrogen is in…………….. oxidatio...

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  16. How is hydrogen of high purity prepared?

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  17. Dihydrogen is relatively inert at room temperature . Give reason.

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  18. Write any two uses of hydrogen.

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

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

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