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Question

Which one of the following oxides dissolves in sulphuric acid as well as in sodium hydroxide?

A
CaO
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B
CO2
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C
ZnO
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D
BaO2
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Solution

The correct option is C ZnO
In chemistry, an amphoteric compound is a molecule or ion that can react both as an acid as well as a base. Many metals (such as copper, zinc, tin, lead, aluminium, and beryllium) form amphoteric oxides or hydroxides. So, ZnO dissolves in sulphuric acid as well as in sodium hydroxide.

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