Chemistry Past Questions and Answers

One of these elements is the best reducing agent ____________

The name of the gas driven off at the negative electrode during the electrolysis of brine is ____________

The oxidation state of \(\mathrm{P}\) in \(\mathrm{H}_{2} \mathrm{P}_{2} \mathrm{O}_{7}{ }^{2-}\) is ____________

The oxidation state of \(\mathrm{S}\) in \(\mathrm{Ca}\left(\mathrm{HSO}_{3}<br/>\right)_{2}\) is ____________

The following substances are non-electrolytes except ____________