Test medicina in Inglese 2014-2015: domande e soluzioni

Test medicina in lingua inglese, la simulazione con le domande e le soluzioni

Domanda 35 di 43

A battery has lead plates dipped in sulfuric acid. When charged, the positive plate is covered with PbO2. After discharge both plates are covered with PbSO4

Which option below correctly describes the overall change in the oxidation number of the lead involved in the chemical reaction during discharge?