MCQ
Correct order of $K_a$ value for given compound
- A$IV > II > III > I$
- B$III > IV > II > I$
- ✓$IV > III > II > I$
- D$IV > III > I > II$
✓
Answer
Correct option: C.
$IV > III > II > I$
c
Acidic strength $\propto \mathrm{K}_{\mathrm{a}} \propto \frac{1}{\mathrm{Pk}_{\mathrm{a}}} \propto \frac{-\mathrm{M}}{+\mathrm{M}} \propto \frac{-\mathrm{I}}{+\mathrm{I}}$
Acidic strength $\propto \mathrm{K}_{\mathrm{a}} \propto \frac{1}{\mathrm{Pk}_{\mathrm{a}}} \propto \frac{-\mathrm{M}}{+\mathrm{M}} \propto \frac{-\mathrm{I}}{+\mathrm{I}}$
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