Assertion and reason

Exercise and reference answers

Questions

1. Reason

   Dilution lowers the ions per unit volume but raises dissociation per mole.

   Verdict

   Both are true; the reason explains the assertion.

   Assertion

   Conductivity falls on dilution while molar conductivity rises.

2. Reason

   Only differences in electrode potential can be measured, so a reference is chosen.

   Verdict

   Both are true; the reason explains the assertion.

   Assertion

   The standard hydrogen electrode is assigned zero potential.

3. Reason

   An electrolytic cell drives a non-spontaneous reaction.

   Verdict

   The assertion is false and the reason is true.

   Assertion

   An electrolytic cell produces electrical energy.

4. Reason

   It involves oxidation and reduction at different sites on the metal.

   Verdict

   Both are true; the reason explains the assertion.

   Assertion

   Corrosion is an electrochemical phenomenon.

Explanation