Which of following would be classified as a $\underline{\text{ chemical }}$ change?
A) the condensation of nitrogen gas
B) the dissolution of sugar in water
C) the melting of gold
D) the tarnishing of the surface of copper in the presence of oxygen
E) the transformation of solid carbon dioxide into gaseous carbon dioxide

Question

Which of following would be classified as a $\underline{\text{  chemical }}$  change?
A) the condensation of nitrogen gas
B) the dissolution of sugar in water
C) the melting of gold
D) the tarnishing of the surface of copper in the presence of oxygen
E) the transformation of solid carbon dioxide into gaseous carbon dioxide

Quizplus · Accepted Answer

Tarnishing of the surface of copper in the presence of oxygen is a chemical change because it involves a reaction between copper and oxygen, leading to the formation of new compounds on the surface of the metal. The other options are physical changes where no new substances are formed.

Which of Following Would Be Classified as A chemical ‾\underline{\text{ chemical }} chemical ​

Which of Following Would Be Classified as A $\underline{\text{ chemical }}$