Which of the following statements is/are CORRECT?
1)The conduction of electricity through copper wire is a chemical change.
2)The rusting of iron is a chemical change.
3)The evaporation of ammonia at -33.3$^{\circ}$C is a chemical change.
A) 1 only
B) 2 only
C) 3 only
D) 2 and 3
E) 1,2,and 3

Question

Quizplus · Accepted Answer

1) The conduction of electricity through copper wire is a physical change as it does not change the chemical composition of copper.
2) The rusting of iron is a chemical change as it involves a chemical reaction between iron, water, and oxygen which results in the formation of a new substance (iron oxide).
3) The evaporation of ammonia at -33.3°F/-36°C is a physical change as it does not involve any chemical reaction or change in the chemical composition of ammonia.

Which of the Following Statements Is/are CORRECT? 1)The Conduction of Electricity

Which of the Following Statements Is/are CORRECT?
1)The Conduction of Electricity