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Q. Oxide of sulphur present in the atmosphere are washed down by rains to cause :
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Q. Nitric acid does not react with
Q. In oil wells, oil, water and gas are present in the ascending order of depth
Q. Which of the following is used to increase the anti-knocking property of petrol ?
Q. Which of the following is not oxidation?
Q. Which of the following gases is present under pressure in soft drinks?
Q. Which of the following gas is used for converting vegetable oils into saturated fats -
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