Experiment 9 — Metal or Non-metal?

Topic: Chemistry · Class 8 · Materials: metals and non-metals

Aim: Identify the mystery sample (it is sulphur ) using the right tests.

Daily: Electricians choose copper for wires and PVC for insulation, cooks choose steel pans and wooden handles, and jewellers beat gold into sheets thinner than paper. Every choice follows from these properties.

Question: Which non-metal conducts electricity and would fool a single conductivity test?

Exp: Graphite is a non-metal that conducts, which is why pencil lead works in a circuit.

Question: Metal oxides dissolved in water are generally…

Exp: Non-metal oxides are acidic instead.

Question: Being able to beat a metal into thin sheets is called…

Exp: Drawing it into wires is ductility.

Question: Which metal is liquid at room temperature?

Exp: A well-known exception to the usual rule.

Question: A metal reacting with dilute acid usually releases…

Exp: The gas burns with a pop.