Davenportlatrice2010idn
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Observe the following images. Which of them shows a chemical change happening?

I is rusting car, II is water boiling, III is cooking eggs and IV is melting ice cream

A. I

B. I and III

C. II and IIII

D. I, II, and III

Sagot :

Answer: B

Explanation:

I. Rusting is a chemical reaction which is oxidation of iron.

II. Boiling water is a physical change. There is no chemical change between H2O molecules. It only shifts to the gas state from the liquid state.

III. When egg is cooked proteins are denaturated so it changes interactions between molecules.

IV. Melting is also just a phase change like boiling.

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