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Permanent hardness in water cannot be cu...

Permanent hardness in water cannot be cured by :

A

Treatment with washing soda

B

Boiling

C

Calgon's method

D

Ion exchange method

Text Solution

Verified by Experts

The correct Answer is:
B
Only temporary hardness which is due to `HCO_(3)^(-)` (bicarbonate) ions is removed by boiling.
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DISHA PUBLICATION-HYDROGEN-Exercise - 2 : Concept Applicator
  1. Permanent hardness in water cannot be cured by :

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  2. Hydrogen at room temperature contains :

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  3. Limiting compositions of f - block hydrides are

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  4. In Bosch's process, which gas is utilised for the production of hydrog...

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  5. Which of the follwing terms is not correct for hydrogen ?

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  6. Nascent hydrogen consists of

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  7. Pick out the correct statement

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  8. Tritium undergose radioactive decay giving

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  9. 2g of aluminium is treated, separately with excess of dilute H(2)SO(4)...

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  10. Metal hydrides are ionic, covalent or molecular in nature. Among LiH, ...

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  11. Calgon used as water softener is

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  12. Chemical A is used for water softening to remove temporary hardness. A...

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  13. Which of the following is not true?

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  14. The volume strength of 1*5 N H(2)O(2) solution is

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  15. 20 volume H(2)O(2) solution has a strength of about

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  16. Which of the following is wrong about H(2)O(2) ? It is used

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  17. The hydride ion H^(-) is a stronger base than its hydroxide ion OH^(-)...

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  18. Which of the following reactiona is an example of use of water gas...

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  19. Heavy water reacts respectively with CO(2),SO(3), P(2)O(5) and N(2)O(5...

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  20. Which of the following is formed by the action of water on sodium pero...

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  21. The percentage by weight of hydrogen in H(2)O(2) is

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