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Water is said to be permanently hard whe...

Water is said to be permanently hard when it contains `:`

A

Chloride and sulphates of `Mg` and `Ca`

B

Bicarbonates of `Na` and `K`.

C

Carbonates of `Na` and `K`

D

Phosphate of `Na` and `K.`

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The correct Answer is:
a
a
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A2Z-HYDROGEN-Water
  1. Whivh of the following is not a hard water ?

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  2. The molarity of pure water at 4^(@)C is

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  3. Water is said to be permanently hard when it contains :

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  4. When temporary hard water containing Mg(HCO(3))(2) is boiled, the ppt....

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  5. Permanent hardness due to Mg^(2+) ions is best removed by

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  6. Heavy wateris compound of :

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  7. Whichh of the following is correct about heavy water ?

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  8. Which of the following statements do not define the characteristic pro...

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  9. Which of the followign is used as a moderator in nuclear reactors ?

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  10. By adding which of the following process, permanent hardness of water ...

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  11. Hardness producing salt, whose solubility in water decreases with rise...

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  12. Molecular weight of heavy water is

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  13. The bond angle and dipole moment of water respectively are :

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  14. Of the two solvent H(2)O and D(2)O, NaCl dissolves

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  15. When zeolite, which is hydrated sodium aluminium silicate is treated w...

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  16. Which of the following metal will not reduce H(2)O ?

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  17. The H-O-H angle in water molecule is about

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  18. Two ice cubes are pressed over each other and unite to form one cube ....

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  19. Water obtained by purification with organic ion exchange resins is

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  20. Which of the following can effectively remove all types of hardness of...

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