What is the correct rank of the following compounds in order of increasing acidity?
A)I II III IV
B)IV III II I
C)IV I II III
D)III I IV II

Question

What is the correct rank of the following compounds in order of increasing acidity? 
A)I > II > III > IV 
B)IV > III > II > I 
C)IV > I > II > III 
D)III > I > IV > II

Quizplus · Accepted Answer

In compound I, there is no acidic hydrogen present. In compound II, the C-H bond is adjacent to a double bond, making it more acidic than compound III where the C-H bond is not adjacent to a double bond. Compound IV has two acidic hydrogens, making it the most acidic compound among the given options. Therefore, the correct order of increasing acidity is IV > I > II > III, which is represented by choice C.

What Is the Correct Rank of the Following Compounds in Order