Chemistry Past Questions and Answers

Consider the reaction represented by the equation: 2SO\(_{2(g)}\) + O\(_{2(g)}\) ⇌ 2SO\(_{3(g)}\); ∆H = - 197 kJmol\(^{-1}\). Which of the following conditions will not increase the yield of sulphur (VI) oxide?

Electrolysis is applied in the following processes except

The oxidation number of iodine in the iodate ion (IO ^-₃) is

Metals can be extracted from their ores by a process involving

Consider the reaction: 2AI_(s) + 6H⁺_(aq) → 2AI³⁺_(aq) + 3H_2(g). What is the total number of moles of electrons transferred from the aluminium atoms to the hydrogen ions?