In the following description of Fe, some of the properties are physical and some are chemical. Identify which of the properties are chemical. a. Iron (Fe) is a lustrous silver gray metal.
b. Iron powder dissolves in an acidic solution with the evolution of a gas.
c. Iron has a density of 7.87 grams per cubic centimeter, melts at 1538 o C and boils at 2862 o C .
d. Iron forms complexes with molecular oxygen in proteins like hemoglobin and myoglobin
e. Iron rusts readily in moist air.

Options b, d and e are chemical properties.

Explanation:

Chemical properties are those related to the formation of new compounds whereas physical properties refer to intrinsic characteristics in which the substance does not change its identity but it can change its state of matter.

From the options, the chemical properties are:

b. Iron powder dissolves in an acidic solution with the evolution of a gas

Because it refers to the ability of iron to react with acid and to form another compound- a gas.

d. Iron forms complexes with molecular oxygen in proteins like hemoglobin and myoglobin

Because it refers to the ability of iron to form new compounds - complexes with oxygen.

e. Iron rusts readily in moist air

Because it is related to the ability of iron to be oxydized by oxygen in the moist air, so it refers to the formation of new compounds.

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