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How is sodium hexametaphosphate useful i...

How is sodium hexametaphosphate useful in removing the permanent hardness of water?

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What is permuitit? How is it useful in removing permanent hardness of water?

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Permanent hardness of water can be removed only by chemical methods. Write the name of any one salt responsible for the permanent hardness of water.

Distinguish between : Temporary and permanent hardness of water.

Write the name and formula of four minerals which cause permanent hardness of water.

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MAXIMUM PUBLICATION-Hydrogen-EXERCISE
  1. Permanent hardness of water can be removed only by chemical methods. W...

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  2. Permanent hardness of water can be removed only by chemical methods. S...

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  3. How is sodium hexametaphosphate useful in removing the permanent hardn...

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  4. Suggest a disadvantage of hard water.

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  5. Hard water contains calcium and magnesium salts. Therefore it does not...

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  6. How will you remove the hardness from the water by using washing soda?

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  7. WhIch method is more suitable to get pure demineralised water?

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  8. Hydrogen peroxide is stored in plastic vessels in dark why?

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  9. About 18% of the total production of dihydrogen is from coal. What is ...

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  10. About 18% of the total production of dihydrogen is from coal. How is d...

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  11. Write any two uses of dihydrogen.

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  12. Water is an amphoteric substance. Justify

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  13. Hydrides are binary compounds of hydrogen with other elements. Give on...

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  14. H2O2 is a bleaching agtent. Why?

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  15. Complete the following reaction. (Zn(s) + NaOH(aq) rarr^(heat) ………………....

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  16. In a seminar, if you are asked to present a paper on hydrogen economy,...

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  17. Give one reaction supporting the amphoteric nature of water.

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  18. Write the names of any two electron - rich hydrides.

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  19. Complete the following reaction: [Ca(HCO3)2 (heat) gives ……………….+ H2O ...

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  20. Syn gas' is a mixture of .....

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