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Question

In the following reactions, ZnO is respectively acting as a/an:
(a) ZnO+Na2ONa2ZnO2
(b) ZnO+CO2ZnCO3

A
Base and base
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B
Acid and acid
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C
Acid and base
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D
Base and acid
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Solution

The correct option is C Acid and base
ZnO+Na2ONa2ZnO2

Sodium oxide (Na2O)
is basic in nature according to the following equation:

Na2O +H2O 2NaOH
Base

Compounds that react with a base to produce a neutral salt are acids and thus in this case ZnO behavies as an acid.

ZnO+CO2ZnCO3

Carbon dioxide is acidic in nature according to the following equation:

CO2 +H2O H2CO3
acid

Compounds that react with an acid to produce a neutral salt are bases and thus in this case ZnO behavies as a base.

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