/7 Science Quiz (for 12 to 16 years old): Quiz 2 1 / 7The hardest substance available on earth is Platinum Diamond Gold Iron 2 / 7Bromine is a highly inflammable gas colourless gas red liquid black solid 3 / 7Which of the gas is not known as green house gas? Methane Hydrogen Carbon dioxide Nitrous oxide 4 / 7What is the primary cause of climate change? Human activity Natural factors Animal activity Climate change is primarily caused by human activity, particularly the burning of fossil fuels and deforestation.5 / 7Washing soda is the common name for Calcium carbonate Calcium bicarbonate Sodium bicarbonate Sodium carbonate 6 / 7Quartz crystals normally used in quartz clocks etc. is chemically sodium silicate a mixture of germanium oxide and silicon dioxide silicon dioxide germanium oxide 7 / 7The gas usually filled in the electric bulb is hydrogen Nitrogen carbon dioxide oxygen Your score is 0% Restart quiz Next quiz Please rate the quiz Send feedback By WordPress Quiz plugin
