Q. Which of the following atom contains the least number of neutrons
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Q. The metal used to recover copper from a solution of copper sulphate is
Q. The coating of a thin layer of zinc on steel or iron objects is known as
Q. Which among the given is a natural dye -
Q. Gas released during Bhopal tragedy was:
Q. The use of gypsum is recomended mainly in soils which are
Q. The hardened material available on earth is
Q. Which of the following one of the following forms of phosphorus is most reactive -
Q. When the universal gas constant (R) is divided by Avogadro's number (N), their ratio is called
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