7th Class Science Sample Paper Science Sample Paper - 4

  • question_answer
    When a candle burn, both physical and chemical changes occur. Explain?

    Answer:

    It is true that when a candle burns, both physical and chemical changes occur. Initially candle burns to produce heat and light. It is a chemical change because candle burns with the formation of gases. Due to the heat produced, some wax simultaneously melts. This is a physical change as the molten candle wax behaves like original candle, 


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