Chemistry Past Questions and Answers

Three drops of a 1.0 mol dm^-3 solution of HCl was added to 20 cm³ of a solution of pH6.4. The pH of the resulting solution will be

Which of the following substances is not a salt?

An insoluble salt can be prepared by

2H₂O _(l) + 2F_2(g) → 4HF_(aq) + O_2(g).
In the reaction above, the substance that is being reduced is

In an electrochemical cell, polarization is caused by