/5 Science Quiz (for 12 to 16 years old): Quiz 20 1 / 5Which metal pollute the air of a big city? Chromium Lead Cadmium Copper 2 / 5Which of the following is an element? Emerald Sapphire Ruby Diamond 3 / 5LPG consists of mainly methane, ethane and hexane methane, butane and propane ethane, hexane and nonane methane, hexane and nonane 4 / 5Which of the following is the lightest metal? Lithium Lead Mercury Silver 5 / 5In fireworks, the green flame is produced because of mercury barium sodium potassium Your score is 0% Restart quiz Next quiz Please rate the quiz Send feedback By WordPress Quiz plugin
