K.C.S.E Physics Q & A - MODEL 2016PP2QN07

K.C.S.E Physics Q & A - MODEL 2016PP2QN07

​Figure 5 shows the cross-section of a dry cell. Use the information on the figure to answer questions below

​(a) Name the parts labeled A and B.
(b) State the use of manganese (IV) oxide in the cell. 

answers

​(a) A – Carbon rod or graphite rod
 B – Mixture of Manganese (IV) oxide with carbon powder
(b) Manganese (IV) oxide is a depolarizer or oxidizing agent. It is used to oxidize hydrogen to water