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Question

When a non-metal reacts with oxygen, it forms a non-metallic oxide. This non-metallic oxide when reacted with H2O, forms a substance, ‘X’ with pH value less than 7. ‘X’ is:

A
Acidic
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B
Basic
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C
Salt
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D
Neutral
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Solution

The correct option is A Acidic
Non-metals on reaction with oxygen gas give rise to non-metallic oxides. These non-metallic oxides on reaction with H2O give acidic products. For example, sulphur is a nonmetal. It forms SO2 and SO3 and forms H2SO3 and H2SO4 on reaction with water. On a pH scale, acids always have a value which is less than 7.

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