lese 24. Who discovered Noble Gas ? (a) Kevin (b) Rutherford (c) Curie (d) Ramsay 25. A food chain starts with which of the following ? (a) Photosynthesis (b) Respiration (c) Decay (d) None of these 26. Depletion of Ozone layer is due to the Oxide of which of the following ? (a) Carbon (b) Phosphorus (d) None of these (c) Nitrogen
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Answer: 25 a)photosynthesis 26 none of these
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