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Which one of the following processes wi...

Which one of the following processes will pro duce hard water

A

Addition of `Na_(2)SO_(4)` to water

B

Saturation of water with `CaCO_(3)`

C

Saturation of water with `MgCO_(3)`

D

Saturation of water with `CaSO_(4)`

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The correct Answer is:
D
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MODERN PUBLICATION-UNIT TEST - 3-MULTIPLE CHOICE QUESTIONS
  1. The oxidation number of O in H(2)O(2) is ?

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  2. Polyhosphates are used as water softening agents because they

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  3. Which one of the following processes will pro duce hard water

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  4. The oxide which gives H(2)O(2) on treatment with dilute acid is

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  5. The structure of H(2)O(2) is

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  6. Which of the following pairs of substances on reaction will not evolv...

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  7. Which of the following is not an ore of magnesium ?

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  8. Magnesium is present in :

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  9. Lithium shows diagonal relationship with

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  10. Slaked lime reacts with chlorine to give :

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  11. Which of the following alkaline earth metal ion has lowest ionic mobil...

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  12. Which of the following is most basic ?

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  13. Which of the following has largest solubility in water ?

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  14. The stability of the following alkali metal chlorides follows the orde...

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  15. The following compounds have been arranged in order of their increasin...

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  16. Among the alkaline earth metals, the element forming predominantly cov...

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  17. A metal M readily forms water soluble sulphate MSO(4), water insoluble...

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  18. The correct sequence of increasing covalent character is represented b...

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  19. A solid compound 'X' on heating gives CO(2) gas and a residue. The res...

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  20. The correct order of the mobility of alkali metal ions in aqueous solu...

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