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Q. Brass gets discolored in air because of the presence of which of the following gases in air?
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Q. In Which among the given states max. iron ore is found
Q. Which of the following substances is sour due to lactic acid?
Q. During fermentation of sugar, the compound which is always formed is:
Q. When the universal gas constant (R) is divided by Avogadro's number (N), their ratio is called
Q. The drugs known as vasodilators are used to treat
Q. A by product of involuntary muscle contraction and relaxation is
Q. Which of the gas is not known as green house gas?
Q. Which of the following is not a natural source of air pollution ?
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