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An element forms an oxide $A_{2} O_{3}$ which is acidic in nature. $A$ will be :
non-metal
metal
noble gas
metalloid

A

metal

B

noble gas

C

non-metal

D

metalloid

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Solution

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Since an oxide of element is acidic in nature, therefore, "A" will be a non - metal because for the non-metal oxides, their acidity is usually thought of in terms of the acidic solutions formed when they react with water. For example, sulphur trioxide reacting to give sulphuric acid.

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