Chemistry Past Questions and Answers

Tetraoxosulphate (VI) acid burns the skin by

When a salt loses its water of crystallization to the atmosphere on exposure, the process is said to be

Three drops of a 1.0 mol dm^-3 solution of NaOH are added to 20 cm³ of a solution of pH 8.4. The pH of the resulting solution will be

25cm³ of a 0.2 mol dm³ solution of Na₂CO₃ requires 20 cm³ of a solution of HCl for neutralization. The concentration of the HCl solution is

The substance least considered as a source of environmental pollution is