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Q. Which one of the following is not a constituent of biogas?
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Q. What determines the colour of a star?
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Q. Citrus fruits belong to the family
Q. Besides CO2, the other green house gas is
Q. The hydrogen ion concentration of a solution is measured using a ?
Q. Which of the following elements is not radio-active ?
Q. Which of the following is a greenhouse gas or a gas which can deplete the ozone layer?
Q. What is the unit of the physical quantity Entropy?
Q. Which of the following type of glass is used for making glass reinforced plastic
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