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Which of the following does not involve a chemical reaction ? (a) digestion of food in our body (b) process of respiration (c) burning of candle wax when heated (d) melting of candle wax on heating |
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Answer» Which of the following does not involve a chemical reaction ? (a) digestion of food in our body (b) process of respiration (c) burning of candle wax when heated (d) melting of candle wax on heating |
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