Which of the following does not describe a physical property of iron? A. Iron is silvery-white or gray in color.

B. Iron has a boiling point of about 3,000 ℃

C. Iron is a magnetic element

D. Iron and sulfur react to form iron sulfide

I believe the answer is D

The Physical properties of Iron are the characteristics that can be observed without changing the substance into another substance. Physical properties are usually those that can be observed using our senses such as color, luster, freezing point, boiling point, melting point, density, hardness and odor.

Explanation:

ColorSilver-gray metal

MalleabilityCapable of being shaped or bent

DuctilityEasily pulled or stretched into a thin wire

LusterHas a shine or glow

ConductivityGood transmission of heat or electricity

AllotropyIt occurs in two or more crystalline forms in the same physical state

TensileIt can be stretched without breaking

FerromagneticEasily magnetized

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.