True. Viscosity refers to the "state of being thick/sticky" (taken from dictionary). So it could be described as a substance like honey's resistance to flowing. Honey is high in viscosity, water is low. So the 'stickier' the substance, the higher in viscosity.
Physical. It describes how the substance is, not what it turns into.
Reactivity is the property that describes how readily a substance combines chemically with other substances. Reactivity is also referred to as the rate at which a chemical substance tends to undergo a chemical reaction.
The ability of a substance to undergo a chemical change is called the Chemical activity of a substance.
Chemical change or chemical reaction describes how a substance can form a new substance.
Viscosity changes when another agent is added to a fluid. For example, paint has a fairly thick viscosity and if intending to apply it using a spray gun, one would need to add thinners, varsol, or turpentine to the paint to thin it out so that it will pass through the gun. Thus changing the viscosity.
Physical. It describes how the substance is, not what it turns into.
The flammability of a substance is a chemical property. Flammability means how easily a substance will burn in oxygen.
this describes a chemical property
Chemical reaction
This is a chemical reaction described by a chemical reaction.
Chemical equation
Reactivity is the property that describes how readily a substance combines chemically with other substances. Reactivity is also referred to as the rate at which a chemical substance tends to undergo a chemical reaction.
Well, no chemical can actually represent a substance with chemical symbols, but I think you're talking about a chemical formula.
The ability of a substance to undergo a chemical change is called the Chemical activity of a substance.
Chemical property
Chemical property
The chemical makeup of something describes what chemicals are present in said substance.