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 $H_2{S}_2{O}_7$.

• A. I, II and III
• B. III only
• C. I and III only
• D. II and III only

Answer 1

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 $H_2{S}_2{O}_7$.
So the correct statements are (I) and (III).