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Q. That is the valency of copper in cuprous oxide?
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Q. Piped Natural Gas (PNG) is used for
Q. Which mixture of metal is used in the Gunmetal?
Q. Besides hydrogen, which of the following elements is common in organic compounds?
Q. The method that cannot be used for removing permanent hardness of water is
Q. The nitrogen atom has 7 protons and 7 electrons,The nitride ion will have
Q. Atomic number is the number equal to
Q. Which among the given gases is most toxic -
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