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A, white powder (A) whén heated gave off...

A, white powder (A) whén heated gave off a coloúrless gas (B) which turns the lime water milky. The residue (C) was yellow when hot but turned white on cooling. Identify '(A),(B)' and '(C)' Write the equation for the action of heat on (B).

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(A) is zinc carbonate (B) is carbon dioxide (C) is zinc oxide .ZnCO_3.. heat .^prime, ZnO+CO_2. (A) (C), (B) .CO_2+Ca(OH)_2 rarr CaCO_a^4+H_2 O. milky
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