ICSE BoardEnglish MediumSTD 6CHEMISTRYMatter2 Marks
Question
Why does a candle become smaller on burning with time?
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Answer
On heating, candle wax melts, then turns into vapour which reacts with air to produce two new substances, carbondioxide and water. Therefore a candle on burning becomes smaller and smaller and the part of wax which has undergone chemical change cannot be recovered.
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