A compound may be composed of different elements.
Is granite a pure chemical substance.
So option b sodium chloride is a right option.
A pure substance is by definition composed of one compound.
So in addition to elements compounds and alloys a pure substance might include honey even though it consists of many different types of molecules.
But there are exceptions to this definition.
Just like granite marble is a mixture.
Mixtures contain more than one chemical substance and they do not have a fixed composition.
Very few samples of matter consist of pure substances.
Common definition of a pure substance.
A pure chemical substance is any matter that has a fixed chemical composition and characteristic properties.
Pure and impure chemical substances a pure element or compound contains only one substance with no other substances mixed in.
A chemical substance may well be defined as any material with a definite chemical composition in an introductory general chemistry textbook.
Impure materials may be mixtures of elements mixtures of compounds.
To a non chemist a pure substance is anything composed of a single type of material.
Just like granite marble is a mixture.
Ordinary table salt is called sodium chloride.
A pure substance participates in a chemical reaction to form predictable products.
However unlike granite marble is typically more than 90 calcium carbonate so it might count as a pure substance.
It is considered a pure substance because it has a uniform and definite composition.
A pure substance can also be defined as a form of matter that has both definite.
In other words it is free of contaminants.
All samples of sodium chloride are chemically identical.
A pure substance or chemical substance is a material that has a constant composition is homogeneous and has consistent properties throughout the sample.
Oxygen for example is a pure chemical substance that is a colorless odorless gas at 25 c.
All matter consists of various elements and chemical compounds but these are often intimately mixed together.