Answer
a - Physical property
b- Chemical property
c- Physical property
d - Chemical property
Work Step by Step
a - Physical property: the sentence describes the color of chlorine gas. No chemical reaction takes place.
b- Chemical property: the sentence describes that zinc reacts with acids. This means that a chemical reaction occur between zinc and acid, therefore a new chemical substance is produced as a result of this chemical reaction.
c- Physical property: the sentence provides the density of of magnesium. This is just a physical property, and no chemical reaction takes place.
d - Chemical property: the sentence describes that iron can rust. In this process iron is turned into rust, and this happens as a result of chemical reaction that takes place between iron and the water in environment.
