Biuret reagent. This is the answer
Answer:
C
Explanation:
When something is chemical it is warped into a completely new substance and when coal is burned it is new so it is definitely C.
1<span>Pepsi is a heterogeneous mixture Oatmeal with raisins is a homogeneous mixture.
2</span>
<span>Milk is a pure substance, not a mixture
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