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A colourless solid (X) on heating evolve...

A colourless solid (X) on heating evolved `CO_(2)` and also gave a white residue , soluble in water. Residue also gave `CO_(2)` when treated with silute acid. (X) is

A

`Na_(2)CO_(3)`

B

`CaCO_(3)`

C

`Ca(HCO)_(2)`

D

`NaHCO_(3)`

Text Solution

Verified by Experts

The correct Answer is:
D
`Na_(2)CO_(3) overset(Delta)to ` No effect
`CaCO_(3) underset(-CO_(2))overset(Delta)to CaO overset("Acid")to CO_(2)`
`Ca(HCO_(3))_(2) underset(-CO_(2))overset(Delta)to underset("Water insoluble")(CaCO_(3))overset("Acid")to CO_(2)`
`NaHCO_(3) underset(-CO_(2))overset(Delta)to underset("Water soluble")(Na_(2)CO_(3))overset("Acid")to CO_(2)`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-S-BLOCK ELEMENTS-Exercise 2
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  3. Nitrogen dioxide cannot be prepared by heating :

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  4. The reducing power of a metal depends on various factors. Suggest the ...

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  5. When NaOH is made, the gas released at the cathode is

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  6. Identify the correct statement.

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  7. On dissolving moderate amount of sodium metal in liquid ammonia at low...

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  8. A combustible gas is liberated when caustic soda solution is heated wi...

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  9. A mixture contains two moles of Na(3)CO(3) and 1 mole of Li(2)CO(3). W...

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  10. Element A burns in nitrogen to give an ionic compound B. Compound B re...

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  11. Sodium is heating in air at 350^(@)C to form A. compound A when reacts...

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  12. A colourless salt X has 50% Na(2)SO(3) and 50% H(2)O . How much of SO(...

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  13. A sodium salt on treatment with MgCl(2) gives white precipitate only o...

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  14. A more economical process but based on same principle was given by

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  15. Reaction given in passage is spontaneous because

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  16. NaOH can also be prepared by electrolysis of equeous NaCl. Amount of N...

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  17. Which of the following compound is used in gun powder ?

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  18. Solubility of alkaline earth metal sulphates decreases down the group ...

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  19. A substance which gives a brick red flame and breaks down on heating t...

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  20. A metal M readily forms its sulphate MSO(4) which is water soluble. It...

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  21. Beryllium and aluminimum exhibit many properties which are similar . B...

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