Question

$p{K}_a$ values are given for some acids. Which is the strongest acid?

• A. 2.05
• B. 3.12
• C. 10.02
• D. 1.24

Answer 1

The correct option is D 1.24

Acids which have the lowest $p{K}_a$ have the highest acidic strength because if the $p{K}_a$ is low, ability to dissociate is high, i.e., amount of $H^{+}$ ions produced are high. So, acid is strong.

Here, 1.24 has lowest $p{K}_a$.