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Q. An element that can form a pentoxide is
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Q. An element that does not occur in nature but can be produced artificially is
Q. The most malleable metal is
Q. The main purification/separation procedure used in petroleum industry is
Q. An element that can form a pentoxide is
Q. The charge on position is equal to the charge on
Q. The two metal ions that cause hardness to water are:
Q. Which among the given is not soluble in water -
Q. Modern periodic table is based on .......... ?
Q. Anaemic patients are deficient in
Q. Which of the following element behaves chemically both as metal & nonmetal -
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