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Q. The gas causing acid rain in an industrial area is
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Q. How many molecules are present in one mole of water?
Q. Which of the following is a chemical change?
Q. "Every matter in the universe is made up of very fine particles", who said this for the fi...
Q. Helium gas is used in gas balloons instead of hydrogen gas because it is
Q. Cutting and peeling of onion brings tears to the eyes because of the presence of _____ ?
Q. For plant growth, the most important compounds are made up of
Q. The process of covering water pipes made of Iron with Zinc layer to prevent corrosion is called :
Q. The enzyme that hydrolyses cane sugar to glucose and fructose is
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