InterviewSolution
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InterviewSolution
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HOTS questions:1. No flame is observed when coal burns but a flame can be seen when a candle is lighted2. A piece of twig takes a longer time to catch fire than a piece of paper. Why?3. Goldsmiths blow the flame on gold or silver blocks from a distance, with a blow pipe. Why?. Why? |
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Answer» Some substances, like magnesium catches fireand burnswith a dazzling whiteflamewhen heated in air. Similarly, when a piece of per is brought near acandle flame, itburns, producing heatandlight. The charcoaland coalbums in air producing carbon dioxide, heatandlight. 2 and 3 question |
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