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Question

When an acid reacts with a metal carbonate or metal hydrogen carbonate, it gives the corresponding salt, gas and product. Name the gas and product?


A

Hydrogen and salt

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B

Carbon dioxide and salt

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C

Carbon dioxide and water

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D

Only carbon dioxide

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Solution

The correct option is C

Carbon dioxide and water


Explanation for the correct option

(C) Carbon dioxide and water

  • When acid reacts with metal carbonates MCO3or metal hydrogen carbonate,MHCO3 salt, carbon dioxide and water will be formed.
  • It is a neutralization reaction.

Metalcarbonateormetalhydrogencarbonate+AcidSalt+Carbondioxide+waterEg:Metalcarbonate:Na2CO3(aq)+2HCl(aq)2NaCl(aq)+CO2(g)+H2O(l)Metalhydrogencarbonate:NaHCO3(aq)+HCl(aq)NaCl(aq)+CO2(g)+H2O(l)

Explanation for the incorrect options

Since, Carbon dioxide and water are formed by the reaction between an acid and a metal carbonate or metal hydrogen carbonate. Therefore, options (A), (B) and (D) are incorrect.

Therefore, the correct option is (C) Carbon dioxide and water.


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