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Calgon used as water softener is...

Calgon used as water softener is

A

`Na_(2)[Na_(4)(PO_(3))_(6)]`

B

`Na_(4)[Na(PO_(3))_(6)]`

C

`Na_(4)[Na_(4)(PO_(4))_(5)]`

D

`Na_(4)[Na_(2)(PO_(4))_(6)]`

Text Solution

Verified by Experts

The correct Answer is:
A
The complex salt of metaphosphoric acid sodium hexametaphosphate `(NaPO_(3))_(6)`, is known as calgon. It is represented as `Na_(2)[Na_(4)(PO_(3))_(6)]`
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DISHA PUBLICATION-HYDROGEN-Exercise - 2 : Concept Applicator
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  2. Metal hydrides are ionic, covalent or molecular in nature. Among LiH, ...

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

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

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  7. 20 volume H(2)O(2) solution has a strength of about

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

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

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

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

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

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

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  14. The correct order of O - O bond length in O(2)H(2)O(2) and O(3) is

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  15. Two ice cubes are pressed over each other until they unite to form one...

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  16. The molarity of a 100 mL solution containing 5.1 g of hydrogen peroxid...

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  17. When water is dropped over sodium peroxide, the colourless gas produce...

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  18. 10 L of hard water required 0.56 g of lime (CaO) for removing hardness...

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  19. The adsorption of hydrogen by metals is called :

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  20. Which of the following statements is correct?

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