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Permanent hardness of water is due to th...

Permanent hardness of water is due to the presence of salts of Ca and Mg in the form of

A

Sulphates and chlorides

B

Nitrates and carbonates

C

Bicarbonates

D

Carbonates

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AAKASH INSTITUTE ENGLISH-TEST 5-EXAMPLE
  1. What is the volume of 10 volume H2O2 solution required to react comple...

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  2. Which of the following statement is correct?

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  3. Permanent hardness of water is due to the presence of salts of Ca and ...

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  4. The average velocity of an ideal gas molecule at 27^oC is 0.9m/s. The ...

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  5. Assertion (A) Permanent hardness of water is removed by treatme...

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  6. Choose the incorrect statement.

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  7. Elements of which of the following group(s) of periodic table do ...

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  8. Consider the reaction H2O2 is

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  9. Which of the following is electron deficient-hydride?

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  10. Match the Column-I to Column-II

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  11. Choose the incorrect statement.

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  12. Equivalent mass of KMnO4 in acidic and basic medium respectively [M = ...

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  13. Identify the compound in which 'S' has highest oxidation state.

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  14. Given : Identify the cell which will give maximum EMF^o

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  15. What is the average oxidation state of oxygen In S2O8^(2-)

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  16. MnO(4)^(2-) undergoes disproportionation reaction in acidic medium but...

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  17. Identity the disproportionation reaction.

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  18. Which of the following arrangements represent increasing oxidation num...

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  19. In which of the following compounds, an element exhibits two different...

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  20. Consider the following reactions. I. 2PbO + 4HCl to 2PbCl2 + 2H2O ll....

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