What happens when
(a) ZnCO₃ is heated in the absence of oxygen?
(b) a mixture of Cu₂O and Cu₂S is heated?

Academic Chemistry NCERT Class 10

(a) When zinc carbonate is heated strongly in the absence of air, zinc oxide and carbon dioxide is produced.

$ZnCO_3(s) → ZnO(s) + CO_2$

(b) When a mixture of Cu2O and Cu2S is heated, copper metal and sulphur dioxide are formed.

$2Cu_2O(s) + Cu_2S → 6Cu(s) + SO_2(g)$

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Updated on: 10-Oct-2022

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