SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following is NOT evidence a chemical change has taken place:
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gas bubbles are produced
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the reactants are of a different size
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2 liquid reactants become a solid product
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heat is given off
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Explanation:
Detailed explanation-1: -Answer and Explanation: The correct option is (d.) a change in appearance only.
Detailed explanation-2: -Color. The changing of color of a substance is not necessarily an indicator of a chemical change.
Detailed explanation-3: -Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color change, formation of a precipitate, formation of a gas, odor change, temperature change.
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