Question

Which of the following statements describe physical properties and which describe chemical properties? (a) Iron has a tendency to rust. (b) Rainwater in industrialized regions tends to be acidic. (c) Hemoglobin molecules have a red color. (d) When a glass of water is left out in the sun, the water gradually disappears. (e) Carbon dioxide in air is converted to more complex molecules by plants during photosynthesis.

Answer 1

Answer:

Explanation:

a ) iron ha tendency to rust       --  chemical property ,because it involves chemical reaction with water and air

b) Rainwater in industrialized regions tends to be acidic ----- chemical property ,because it involves chemical reaction with bases or metals etc

c) Hemoglobin molecules have a red color  ------------ Physical property because it does not involve any chemical reaction

d) When a glass of water is left out in the sun ,the water gradually disappears

---------- Physical property, because the process can be reversed easily so it is a physical change.

e) Carbon dioxide in air is converted to more complex molecules by plants during photosynthesis.--------Chemical property, because it involves chemical reactions.