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Question

The correct statement(s) among the following are:
I The most stable form (allotropic) of sulphur at room temperature is rhombic.
II Ozone is an allotropic form of oxygen and is a powerful reducing agent.
III The formula of oleum is H2S2O7.

A
I, II and III
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B
III only
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C
I and III only
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D
II and III only
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Solution

The correct option is C I and III only
(I) The most stable allotropic form of sulphur is rhombic sulphur.
(II) Ozone is allotropic form of oxygen but it acts as a powerful oxiding agent
(III) The formula of oleum is H2S2O7.
So the correct statements are (I) and (III).

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