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