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Both temporary and permanent hardness ca...

Both temporary and permanent hardness can be removed by using

A

`Ca(OH)_2`

B

`Na_2CO_3`

C

`NaCl`

D

`NaOH`

Text Solution

Verified by Experts

The correct Answer is:
B
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Soap is the sodium salt of a long chain fatty acid, Sodium salt stearic acis is soluble in water, whereas calcium and magnesium salts are insoluble, so when soap is added to soft water, it dissolves and forms lather readily. Temporary hardness in water can be easily removed by boiling. Permanent hardness can be removed by the addition of washing soda, Calgon process, ion exchange process. The degree of hardness of a sample of water containing 6 mg of magnesium sulphate (other salts are absent) per kilogram of water is

Soap is the sodium salt of a long chain fatty acid, Sodium salt stearic acis is soluble in water, whereas calcium and magnesium salts are insoluble, so when soap is added to soft water, it dissolves and forms lather readily. Temporary hardness in water can be easily removed by boiling. Permanent hardness can be removed by the addition of washing soda, Calgon process, ion exchange process. Calgon contains

Temporary hardness of water can be removed

Temporary hardness of water can be removed

What causes the temporary and permanent hardness of water?

(A) : Temporary hardness can be removed by boiling hard water (R) : On boiling hard water bicarbonates of calcium and magnesium are converted to insoluble carbonates

Permanent hardness of water is due to

Some changes are listed below, classify them as temporary and permanent.The sawing of a piece of wood into two

Temporary hardness of water can be removed (A) By Clark.s process (B) By Boiling water

AAKASH SERIES-HYDROGEN AND ITS COMPOUNDS-OBJECTIVE EXERCISE - 2B
  1. Which is soluble in water

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  2. Exhausted permutit does not contain the following cation

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  3. Both temporary and permanent hardness can be removed by using

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  4. Heavy water can be prepared by

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  5. Solubility of NaCl in heavy water is

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  6. Which of the following is a correct statement regarding D2O

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  7. Anhydride of deutero nitric acid is

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  8. The compound formed when heavy water reacts with Ca3P2 is 'X'. Its mo...

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  9. At 20^@C the electrical conductivity of water is 5.7 xx 10^(-8) ohm^(...

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  10. If excess of Ca(OH)2 is added to hard water in Clark's method

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  11. pH of the water coming out of cation exchange resin

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

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

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  14. 100Kg of a sample of water contained 6 g of MgSO4 . The degree of hard...

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

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

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

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

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

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

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