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A sample of water contained 30ppm of MgS...

A sample of water contained 30ppm of `MgSO_4` . Its hardness is

A

25ppm

B

20ppm

C

30ppm

D

150ppm

Text Solution

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The correct Answer is:
A
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AAKASH SERIES-HYDROGEN AND ITS COMPOUNDS-OBJECTIVE EXERCISE - 2B
  1. pH of the water coming out of cation exchange resin

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  2. 12 ml of saturated solution .001gr of CaCO(3) were required in the ti...

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  3. A sample of water contained 30ppm of MgSO4 . Its hardness is

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  4. 100Kg of a sample of water contained 6 g of MgSO4 . The degree of hard...

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  5. The physical constant which is less for water than for heavy water is

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  6. The temperature of heavy water is increased from 4^@C to 14^@C . Then ...

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  7. If 1 kg of water contains 12 mg of magnesium sulphate its degree of ha...

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  8. Assertion (A) : Heavy water is used as moderator in nuclear reactors. ...

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  9. Two samples of water A and B having concentration 16.2 pp m of Ca(HCO...

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  10. O2^(2-) is the symbol of the ion

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  11. H2O2 is obtained by adding dil H2SO4 to

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  12. In the preparation of H2O2 from BaO2 , phosphoric acid is preferred t...

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  13. In auto oxidation preparation of H(2)O(2) the oxidizing agent is

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  14. Destabiliser of hydrogen peroxide is

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  15. In H2O2 the degree of hydrogen bonding is

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  16. 'H(2)O(2)' ---> 2H + O(2) + 2e The above equation represents the follo...

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  17. As an oxidising agent, hydrogen peroxide reacts rapidly in

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  18. H2O2 + H2O to H2O^(+) toHO2^- This reaction indicates

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  19. H2O2 oxidises the following

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  20. H2O2 turns acidified solution of the following to orange red

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