/6 Science Quiz (for 12 to 16 years old): Quiz 5 1 / 6The element common to all acids is hydrogen oxygen sulphur carbon 2 / 6Non stick cooking utensils are coated with PVC black paint polystyrene Teflon 3 / 6Heavy water is PH7 deuterium oxide rain water tritium oxide 4 / 6The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of bromine sulphur chlorine fluorine 5 / 6Carbon, diamond and graphite are together called allotropes isomers isomorphs isotopes 6 / 6Monazite is an ore of iron zirconium thorium titanium Your score is 0% Restart quiz Next quiz Please rate the quiz Send feedback By WordPress Quiz plugin