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Q. Which metal is extracted from sea water?
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Q. The nitrogen atom has 7 protons and 7 electrons,The nitride ion will have
Q. The poisonous substance that is the main constituent of tobacco is
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Q. In fireworks, the green flame is produced because of
Q. Which compound contains both ionic and covalent bonds?
Q. An element that can form a pentoxide is
Q. Which of the following has the lowest melting point?
Q. When a gas ‘X’ reacts with lime water, a compound ‘Y’ is formed. If both X a...
Q. Water is not effective in extinguishing a fire caused by petrol because
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