(a) Name the crystalline allotrope of sulphur that is stable at room temperature. (b)(i) Give one example of a fuel that contains significant amount of sulp...

(a) Name the crystalline allotrope of sulphur that is stable at room temperature.

(b)(i) Give one example of a fuel that contains significant amount of sulphur as an impurity.

(ii) State one environmental disadvantage of using a fuel that has high sulphur content