why nail rust is not chemical change?

[hunterpostbacst]

There are physical change and chemical change in classifying changes in general chemistry. I thought the nail rust is a kind of chemical change because the nail is oxdized through the chemical reaction. But, topscore says not.

Anyone, please?

I went through kaplan and destroyer twice and thought my knowledge of science is all set to DAT next Saturday. But, when I took topscore I got 18...DAT is almost same format and level as topscore?

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[dl9006]

could you post the exact question?

i would have thought rusting would be considered an electrochemical reaction.

it is going from iron to iron oxide...

 

[bennijai]

Rusting of nail should be classified as a chemical change...oxygen is binding with the metal to make rust.

 

[smurf528]

Well, my Topscore says it is...here's the question.

Identify the incorrectly matched process with its respective physical/chemical change.

A. Antifreeze Boils: Physical Change
B. Sugar Dissolves Physical Change
C. Gasoline Burns: Chemical Change
D. Nail Rusts: Chemical Change
E. None of these

 

[bennijai]

He must've misread the questions, careful on DAT.

 

[tinman831]

Maybe you're not understanding the question. It asks which is INCORRECTLY paired. All of the answer choices are paired with their respective partners.

 

[jay47]

Maybe you're not understanding the question. It asks which is INCORRECTLY paired. All of the answer choices are paired with their respective partners.

Exactly..read the question carefully....