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Which of the following is a chemical reaction?
A. Water freezes.
B. Sugar dissolves in water.
C. Salt and pepper are mixed in a dish.
D. Iron rusts.


Sagot :

Answer:

i think it is d

Explanation:

sorry if wrong

Answer: D. Iron rusts

Explanation: Rust is made from different chemicals in the air that come in contact with said metal. That could be acidic rain for example. Water freezing is only changing temperature. Sugar dissolving is breaking down molecules. Salt and pepper mixed in a dish is a physical change (also that's just plain evil to some people but that isn't the point). Your answer will be D. Iron rusts.

Hope this helps!