SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Sandra was burning a vanilla candle. Was there a chemical reaction?
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no, because burning is never a chemical reaction.
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Yes, because the properties of the wick changed.
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yes, because heat was added.
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no, because the ash formed was a different substance.
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Explanation:
Detailed explanation-1: -yes, because the properties changed and a new substance was made.
Detailed explanation-2: -The burning of a candle is a chemical change whereas the melting of a candle is a physical change.
Detailed explanation-3: -The wax near wick of the candle burns and gives new substances like carbon dioxide, carbon soot, water vapour, heat and light. This is a chemical change.
Detailed explanation-4: -Burning involves the process of combustion. The candle is basically a carbon containing material which combines with oxygen to give out carbon dioxide. This process is a chemical change.
There is 1 question to complete.