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The temporary hardness of water is due t...

The temporary hardness of water is due to :

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`Ca(HCO_3)_2` is responsible for temporary hardness of water.
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MODERN PUBLICATION-HYDROGEN-Competition file (Objective Questions) (Multiple Choice Questions from Competitive Examinations)
  1. Water gas is produced by

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  2. The volume of oxygen liberated at STP from 15 mL of 20 volume H2 O2 is

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  3. Which of the following ions will cause hardness in water ?

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  4. Hydrogen peroxide oxidises [Fe(CN)6]^(4-) to [Fe(CN)6]^(3-) in acidic...

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  5. The volume strength of 1 M H2 O2 is (molar mass of H2 O2 = 34 g "mol"^...

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  6. The isotopes of hydrogen are :

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  7. The temporary hardness of a water sample is due to compound X. Boiling...

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  8. the hardness of a water sample (in terms of Equivalents of CaCO(3)) ...

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  9. The metal that gives hydrogen gas upon treatment with both acid as wel...

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  10. The synonym for water gas when used in the production of methanol is :

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  11. The number of water molecule(s) not coordinated to copper ion directly...

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  12. The strength of 11.2 volume solution of H2O2 is: [Given that molar mas...

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  13. The temporary hardness of water is due to :

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  14. The total number of isotopes of hydrogen and number of radioactive iso...

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  15. The hydride that is NOT electron deficient is :

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  16. NaH is an example of :

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  17. The chemical nature of hydrogen peroxide is :

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  18. Amongst H2O, H2S, H2 Se and H2 Te, the one with the highest boiling po...

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  19. Polyphosphates are used as water softening agents because they

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  20. Hydrogen peroxide in its reaction with KIO(4) and NH(2)OH respectively...

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