Question

2.5g zinc carbonare is heated what is the mass of zinc oxide formed? ZnCO3 ~ ZnO+CO2

Answer 1

Explanation:

hope this will help you my friend.

Answer 2

Answer:

first chemical and then physical

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

ZnCO 3 →ZnO+CO2 ↑ (yellow)

As it forms different products, it undergoes chemical changes.

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

ZnO⟶ZnO

(yellow) (white)

The process involves both physical and chemical change. The heating of zinc carbonate is chemical change whereas cooling the product obtained is a physical change.

Hence, option C is correct.