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 ?

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

1.	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 ?
Answer» Solution : (a) Place the SAMPLE on an iron block. Strike withhammer. If the sample takes the shape of a sheet, it is a metal. If it breaks into pieces, it is a non-metal. Set up an arrangement by using a bulb, a battery,wires and a SWITCH . Insert the samples ofmetals and non-metals in the clips one by one andturn the switch on. If the bulb glows, the sample isa metal. If not, then the sample is a non-metal. (b) The above TWO methods can, in general, be used to distinguish between metals and non-metals.But there are some exceptions. For example, GRAPHITE, which is a form of CARBON, a non-metal,is a conductor of electricity.