/6 Science Quiz (for 12 to 16 years old): Quiz 4 1 / 6In which of the following activities silicon carbide is used? Disinfecting water of ponds Making casts for statues Making cement and glass cutting very hard substances 2 / 6Among the various allotropes of carbon, coke is the hardest, graphite is the softest diamond is the hardest, coke is the softest diamond is the hardest, graphite is the softest diamond is the hardest, lamp black is the softest 3 / 6The average salinity of sea water is 2.5% 3.5% 3% 2% 4 / 6Galvanised iron sheets have a coating of tin zinc lead chromium 5 / 6The group of metals Fe, Co, Ni may best called as rare metals alkali metals main group metals transition metals 6 / 6When an iron nail gets rusted, iron oxide is formed with decrease in the weight of the nail with increase in the weight of the nail without any change in colour or weight of the nail without any change in the weight of the nail Your score is 0% Restart quiz Next quiz Please rate the quiz Send feedback
