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