Which of the following is not an indicator of a chemical change?
A. Change of state.
B. Change in shape.
C. Effervescence
D. Evolution of heat.
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answer is change in shape
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Color. The changing of color of a substance is not necessarily an indicator of a chemical change. For example, changing the color of a metal does not change its physical properties. However, in a chemical reaction, a color change is usually an indicator that a reaction is occurring.21-Aug-2020
Solid → Gas: Sublimation
Gas → Liquid: Condensation
Liquid → Gas: Vaporization
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