Question

Which option below describes a chemical property of a substance?

A. the chlorine gas was a yellow-green color at room temperature
B.The liquid mercury boiled at a temperature of 630 K
C. The iron nail became rusty when exposed to water and air
D. The solid silver was shiny and nearly white in color.

Answer 1

the answer is c
when an iron nail becomes rusty is a chemical change. the air and the water on the nail makes it rusty

Answer 2

C

Step-by-step explanation:

Rust is a chemical change (reaction) all of the other options only change the state meaning that it is a physical reaction.