Question

Law of mass action cannot be applied to:

• A. decomposition of gaseous $HI$
• B. decomposition of gaseous $PC{l}_5$
• C. transition of Rhombic Sulphur to Monoclicnic sulphur
• D. decomposition of Calcium carbonate

Answer 1

Answer: (C)

transition of Rhombic Sulphur to Monoclicnic sulphur

The transition of Rhombic sulphur to monoclinic sulphur is not a chemical reaction since the chemical species sulphur remains the same. It only change from one allotropic form to the other.

Hence, law of mass action cannot be applied.