(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...
Question 1 Report
(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
Answer Details
(a) Crystalline allotrope stable at room temperature
Rhombic sulphur (alpha-sulphur), which is stable below about 96 °C.
(b)(i) A fuel containing significant sulphur as an impurity
Coal (crude oil / petroleum and diesel are also acceptable).
(ii) One environmental disadvantage
Burning such a fuel releases sulphur(IV) oxide (SO2), which pollutes the air and reacts with rain water to form acid rain. Acid rain damages buildings, plants, soils and aquatic life, and the gas also causes respiratory problems.
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