How many unique protons are present in each of the following compounds?

Question

Quizplus · Accepted Answer

For compound I, there are 6 unique protons because there are 3 different groups of protons (CH3, CH2, and C = O) with 2 protons each.
For compound II, there are 4 unique protons because there are 4 different groups of protons (CH3, CH2, CH, and C = O) with 1 proton each.
For compound III, there are 6 unique protons because there are 3 different groups of protons (CH3, CH2, and C = C) with 2 protons each. Therefore, the best choice is D.

How Many Unique Protons Are Present in Each of the Following