Question

Which of the following is not a characteristic feature of a pure substance?

• A. A substance contains different types of atoms or molecules
• B. It is perfectly homogeneous
• C. It have a definite composition which does not change with them
• D. It has definite melting point, boiling point, density etc.

Answer 1

Answer: (A)

A substance contains different types of atoms or molecules

Pure substances are substances whose all the constituent particles are same in their chemical nature and made up of same type of components throughout.