A greenish blues solid A is heated. It gives off a colourless gas B and leaves a black solid C. (i) Name the gas B and give a test for tge gas B? (ii) Write a balanced chemical equation for the reaction given above?

1 Answer
Gaya3
May 6, 2018

(i) #"CO"_2#
(ii) #"CuCO"_3 -> "CuO" + "CO"_2#

Explanation:

When copper carbonate (greenish blue solid) is heated, it reacts with oxygen in air to form copper oxide (black solid) and carbon dioxide (colourless gas).

(i) #"CO"_2#
Test : Bubbling the gas through lime water will turn lime water milky.

(ii) #"CuCO"_3 -> "CuO" + "CO"_2#

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