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