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27 August, 12:15

Which is the least reliable indicator of a chemical change?

change of color

change of odor

formation of gases

change of shape

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  1. 27 August, 12:50
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    I think the correct answer from the choices listed above is the last option. The least reliable indicator of a chemical change would be a change in shape. It does not indicate that a reaction happened. It can be that the substance was cut or crushed only. Hope this answers the question.
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