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Q. The blue colour of the water in the Sea is due to-
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Q. The so-called fourth state of matter refers to
Q. Too much consumption of tea or coffee can result in deficiency of
Q. The yellow colour of human urine is due to a pigment called?
Q. Kilowatt is a unit to measure:
Q. Which instrument is used for photographing the Sun
Q. Which hydrocarbon is formed by the action of sodium on ethyl iodide?
Q. The depletion of Ozone layer is mainly due to
Q. Which of the following one of the following metals is used to galvanise iron
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