Activity 5.4 (Pg no. 84): (a) Which zone of a flame is used by a goldsmith to melt gold or silver and why? (b) Your grandmother wants to make kajal (black charcoal), which part of flame help her to do so? (c) Why does the wick of a candle not burn? (d) Why the wax in and near the wick of a candle melts?
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the outermost zone because it is the hottest and non luminous .b the soot of the burn is used
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