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