how many different kinds of protons are present in the following molecule? select one: a. 2 b. 3 c. 4 d. 5

Explanation:

Step1: Identify equivalent protons

In a molecule, equivalent protons have the same chemical - environment. For a simple cyclic ether (oxane shown), we consider symmetry.

Step2: Analyze proton types

There are 3 different types of protons. Protons on the carbon atoms adjacent to the oxygen are one type, protons on the next - door carbon atoms are another type, and the remaining protons are the third type.

Answer:

B. 3