A student mixes two solutions, planning to produce a chemical reaction. The evidence that no chemical reaction is happening is a change in appearance only.
What is a chemical reaction?
A chemical reaction is in which there is reactant and product and also involve chemical substance. When two or more reactant combines, the substance changed, and the result is called product.
The options are attached:
(a.) a color change
(b.) a temperature decrease
(c.) a new smell
(d.) a change in appearance only
Thus, the correct option is (d.) a change in appearance only.
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