Question

residue of heated zinc carbonate is cooled and desolved in naoh. what are the observations​

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.

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Answer 2

Answer:

ZnCO3+NaOH--------- ZnOH+NaCO3

Explanation:

zinc carbonate reacts with sodium hydroxide to form zinc hydroxide and sodium carbonate.

this is a double displacement reaction.

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