On heating which of the following releases \( \mathrm{CO}_{2} \) most eesily? (A) \( \mathrm{K}_...

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On heating which of the following releases \( \mathrm{CO}_{2} \) most eesily?
(A) \( \mathrm{K}_{2} \mathrm{CO}_{3} \)
(B) \( \mathrm{Na}_{2} \mathrm{CO}_{3} \)
(C) \( \mathrm{MgCO}_{3} \)
(D) \( \mathrm{CaCO}_{3} \)
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