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Q. The percentage of nitrogen in Air is
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Q. Friction can be reduced by changing from
Q. Eutrophication of a water body enhances
Q. Which among the given is used as a lubricant in heavy machines
Q. Which among the given illustrations is not based on the principle of pressure?
Q. Kilowatt is a unit to measure:
Q. The enzyme that converts glucose to ethyl alcohol is:
Q. All isotopes of the same element have ______
Q. Which of the following type of reaction produces the most harmful radiation -
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