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The permanent hardness of water is due t...

The permanent hardness of water is due to the presence of

A

hydrogen carbonates of Ca and Mg in water

B

carbonates of alkali metals in water

C

sulphates of CO and Cu in water

D

chlorides and sulphates of Ca and Mg in water

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The correct Answer is:
D
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MARVEL PUBLICATION-SOLID STATE -Multiple choice questions
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  2. Which of the following statement(s) is/are correct in the case of he...

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  9. The degree of hardness of water is usually expressed in terms of

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  10. Explain why calcuim ion makes water hard, but sodium ion does not.

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  14. Industrial preparation of H2O2 , involves auto oxidation of

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  15. H(2)O(2) is always stored in black bottles because

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  16. The compound useful for restoring aerobic conditions to sewage waste i...

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  17. Hydrogen peroxide is not stored in glass bottle as

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  18. Reaction of ethylene with H2O2 gives

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