Question

Residue colour for zinc carbonate​

Answer 1

Answer:

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Explanation:

white

whiteZinc carbonate is a white powdery solid. When it is heated strongly, it starts to turn yellow and decompose - carbon dioxide gas is evolved, which forms a white precipitate in limewater. The yellow solid left behind in the test-tube is hot zinc oxide. As the hot zinc oxide cools, it turns white in colour.

Answer 2

Answer:

Explanation:

Znco3 --- zno +H2o

+co2