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What causes the temporary and permanent ...

What causes the temporary and permanent hardness of water ?

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The correct Answer is:
Temporary hardness - due to bicarbonates of Ca & Mg
Permanent hardness - due to chlorides & sulphates of Ca & Mg.
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RESONANCE ENGLISH-EQUIVALENT CONCEPT & TITRATIONS-Exercise -1 (Part-I )
  1. Determine the equivalent weight of Nacl

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  2. Determine the equivalent weights of the following: K2SO4

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  3. 1.12 litre dry chlorine gas at STP was passed over a heated metal when...

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  4. A mixture of CuS (molecular weight = M(1)) and Cu(2)S (molecular weigh...

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  5. Determine the equivalent weight of the following oxidising and reducin...

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  6. 0.98 g of the metal sulphate was dissolved in water and excess of bari...

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  7. A dilute solution of H(2)SO(4) is made by adding 5 mL of 3N H(2)SO(4) ...

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  8. What volume at NTP of gaseous ammonia will be required to be passed in...

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  9. 1.60 g of a metal A and 0.96 g of a metal B when treated with excess ...

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  10. It requires 40.05 ml of 1MCe^(4+) to titrate 20ml of 1 M Sn ^(2+) to S...

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  11. 25 mL of a solution of Fe^(2+) ions was titrated with a solution of th...

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  12. How many ml of 0.3M K2 Cr2 O7(acidic) is required for complete oxidati...

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  13. A mixture of H(2)SO(4) and H(2)C(2)O(4) (oxalic acid ) and some inert ...

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  14. A mixture containing As(2)O(3) and As(2)O(3) requried 20 " mL of " 0.0...

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  15. 20mL of H(2)O(2) after acidification with dilute H(2)SO(4) required 30...

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  16. A 100 mL sample of water was treated to convert any iron present to Fe...

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  17. What causes the temporary and permanent hardness of water ?

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  18. A driver having a definite reaction time is capable of stopping his ca...

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