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