You are given a hammer, a battery, a bulb, wires and a switch.

$(a)$ How could you use them to distinguish between samples of metals and non-metals ? 

$(b)$ Assess the usefulness of these tests in distinguishing between metals and non-metals.

Name two metals which will displace hydrogen from dilute acids, and two metals which will not.

Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).

Food cans are coated with tin and not with zinc because

Samples of four metals $A$, $B$, $C$ and $D$ were taken and added to the following solution one by one. The results obtained have been tabulated as follows.

Use the Table above to answer the following questions about metals  $A$, $B$, $C$ and $D$.

$(i)$ Which is the most reactive metal ?

$(ii)$ What would you observe if $B$ is added to a solution of Copper $(II)$ sulphate ?

$(iii)$ Arrange the metals $A$, $B$, $C$ and $D$ in the order of decreasing reactivity.