(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
(a) The Rhombic (Octahedral) Sulphur is the stable allotrope at room temperature.
(b)(i) Petroleum crude oil
(ii) Air pollution.
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