Question

Compounds with the same molecular formula but different structures are called

• A. isotopes
• B. homologous compounds
• C. functional groups
• D. isomers

Hint:

Remember the saying: "Isomers have the same parts (molecular formula) but are arranged differently."

Answer 1

The Correct Option is D

Step 1: Understand the definitions of the given terms.

• 
  Isotopes:
  Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons. They have the same atomic number but different mass numbers. Isotopes refer to different forms of the same element, not different compounds with the same molecular formula.
• 
  Homologous compounds:
  Homologous compounds are a series of organic compounds with the same functional group and similar chemical properties, where successive members differ by \(CH_2\). They have different molecular formulas.
• 
  Functional groups:
  A functional group is a specific group of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. Compounds with the same functional group can have different molecular formulas and structures.
• 
  Isomers:
  Isomers are compounds that have the same molecular formula but different structural arrangements of atoms. These different structures lead to different physical and chemical properties.

Step 2: Match the definition in the question with the correct term.
The question describes compounds that have the same molecular formula but different structural formulas. This is the definition of isomers.