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Chemical A is used for water softening t...

Chemical A is used for water softening to remove temporary hardness. A reacts with sodium carbonate to generate caustic soda. When carbondioxide is bubbled through A, it turns cloudy. What is the chemical formula of A? 

A

`CaCO_(3)`

B

CaO

C

`Ca(OH)_(2)`

D

`Ca(HCO_(3))_(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
Slaked lime Is used to remove tamporary hardness of water. It converts soluble bicarbonates of Mg and Ca into insoluble carbonates of Mg and Ca.
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AAKASH SERIES-ALKALINE EARTH METALS-ADDITIONAL PRACTICE EXERCISE (LEVEL -1 (MAIN)
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  2. Which of the following halide is covalent

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  3. Which of the following alkaline earth metal does not react with cold w...

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  6. Beryllium differs from other alkaline earth metals because of

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  11. Which is not a use of plaster of pairs

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  12. Which ion is present in bones and teeth as apatite ?

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  13. Enamel on teeth is

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  14. Which of the following is a role of Ca^(+2) in biology

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  15. Enzymes like phosphohydrolases and phosphotransferases contain

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  16. CaCO(3)overset(Delta)underset(1073)rarr CaO+CO(2) (Reverse reaction ...

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  17. Alkaline earth metals exhibit +2 oxidation state in aqueous solution d...

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  18. Metal A when burnt in air forms only an oxide while metal B When brunt...

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