Question

A pure substance is made up of __________

• A. different type of particles in a fixed ratio
• B. different type of particles
• C. same type of particles
• D. Both b and c

Answer 1

The correct option is C same type of particles

The substances consisting of only one kind of particles (atoms or molecules) throughout are termed as pure substances.
They are further classified as elements and compounds.
Elements contain only one kind of atoms whereas compounds are made up of the same kind of molecules.