Question

zinc carbonate is heated​

Answer 1

Answer:

Zinc 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:

• When Zinc carbonate is heated which is a white powdery solid, gives carbon dioxide and a yellow solid of zinc oxide.

$\large \tt \dag \: \: \: \boxed {ZnCO3 \longrightarrow ZnO + CO2}$

On cooling yellow solid turns in to white, which is a physical change.

hope it helps...