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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 `CO_(2)` is bubbled through a solution of 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:
D
`Ca(HCO_(3))_(2)` removes temporary hardness from water.
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DINESH PUBLICATION-S-BLOCK ELEMENTS (ALKALI AND ALKALINE EARTH METALS )-MCQB
  1. The strongest base in the following is :

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  2. The hydroxide which is max, soluble in water is ?

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  3. Chemical A is used for water softening to remove temporary hardness. A...

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  4. Calcium carbide on hydrolysis forms :

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  5. As the alkaline earth metals (except Be) tend to lose their valence el...

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  6. Initial setting of cement is mainly due to

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  7. H(2)O is depolar, wheras BeF(2) is not. it because

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  8. The correct sequence of increasing covalent character is represented b...

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  9. The correct order of mobility of alkali metal ions in aqueous solution...

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  10. The correct order of increasing thermal stability of K(2)CO(3),MgCO(3)...

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  11. The alkali metals form salt like hydrides by the direct synthesis at e...

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  12. Which of the following oxides is not expected to react with sodium hyd...

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  13. Which one of the following alkaline earth metal sulphates has its hydr...

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  14. Which one of the alkaline earth metal carbonates is thermally the most...

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  15. Which one of the alkali metals forms only the normal oxide, M(2)O, on ...

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  16. The ease of adsorption of the hydrated alkali metal ions on ion-exchan...

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  17. Which of the following alkaline earth metal ions has the highest ionic...

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  18. In the reaction, M + CO(2) to MO(2) (superoixde) the metal M is :

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  19. Which of the following metals cannot give flame test ?

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  20. The function of "Sodium pump" is a biological process operating in eac...

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