a) Mohan places a glass plate with the help of tongs in the middle zone of the candle Explain the observation made by Mohan after the glass plate has been placed in the middle zone for around 15 seconds
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This is because the outermost zone of a flame is the hottest zone in which the complete combustion is taking place, while the yellow zone (in which Abida had kept the beaker) is less hot as this is the middle zone which is the zone of partial combustion so it is less hotter than the outermost zone.
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Answer: Goldsmiths blow the outer most zone of a flame in order to melt gold or silver because the outermost zone is a zone of complete combustion, also known as luminous zone. The ignition temperature of this zone is the highest and thus helps in melting the metal the best in order to creat desired designs or patterns.
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