Chemistry Past Questions and Answers

The reaction between sulphur (IV) oxide and oxygen is represented by the equilibrium reaction 2SO<sub style='font-size: smaller;'>2(g)</sub> + O<sub style='font-size: smaller;'>2(g)</sub> ↔ 2SO<sub style='font-size: smaller;'>3(g)</sub>, ∆H = -196 kJ. What factor would influence increased production of SO<sub style='font-size: smaller;'>3(g)</sub>?

Magnesium ribbon was allowed to burn inside a given gas P leaving a white solid residue Q. Addition of water to Q liberated a gas which produced dense white fumes with a drop of hydrochloric acid. The gas P was?

The best treatment for a student who accidentally poured concentrated tetraoxosulphate (VI) acid on his skin in the laboratory is to wash the skin with?

In which of the following pairs of element is allotropy exhibited by each element?

Which of the following gases can best be used for demonstrating the fountain experiment?<br/>i) Nitrogen (ii) Ammonia (iii) Nitrogen (I) oxide<br/>(iv) Hydrogen chloride.