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Question

_________releases a gas with the addition of dilute acid.

A
N2
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B
KI
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C
CCl4
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D
AgNO3
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E
CaCO3
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Solution

The correct option is E CaCO3
Option E is the correct answer.
When calcium carbonate is added to a dilute acid, a calcium salt is obtained along with the release of carbon dioxide gas and water. A reaction can be given as:
CaCO3 + 2HCl CaCl2 + H2O + CO2

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