/6 Science Quiz (for 12 to 16 years old): Quiz 1 1 / 6Which of the following is used in pencils? Graphite Charcoal Silicon Phosphorous 2 / 6Brass gets discoloured in air because of the presence of which of the following gases in air? Oxygen Carbon dioxide Nitrogen Hydrogen sulphide 3 / 6Which of the following metals forms an amalgam with other metals? Lead Mercury Zinc Tin 4 / 6Chlorophyll is a naturally occurring chelate compound in which central metal is calcium copper iron magnesium 5 / 6Chemical formula for water is H2O Al2O3 CaSiO3 NaAlO2 6 / 6Which of the following is a non metal that remains liquid at room temperature? Helium Bromine Phosphorous Chlorine Your score is 0% Restart quiz Next quiz Please rate the quiz Send feedback By WordPress Quiz plugin
