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Q. Chernobyl disaster is the result of pollution by
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Q. Diesel oil is preferred for heavy motor vehicles because of
Q. The nitrogen atom has 7 protons and 7 electrons,The nitride ion will have
Q. The number of unpaired electrons in carbon atom is
Q. Which of the following characteristics is not typical of ionically bonded crystals?
Q. The atomic number of an element is equal to the
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