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HOTS questions:1. No flame is observed when coal burns but a flame can be seen when a candle is lighted. Why |
Answer» <p>The substances which vaporize during burninggive flames. For example combustion of kerosene oil producesflame. On the other hand certain substances likecoal donot vaporizeandhence doesn't produce aflame.</p> <p>thnq</p> | |