OnlineCBT
Chemistry · EQUILIBRIUM
हिन्दीWhich of the following orders of acid strength is correct and aligned with the combined influence of H–A bond dissociation energy and electronegativity?
Correct answer · Option 3
\( \text{CH}_4 < \text{NH}_3 < \text{H}_2\text{O} < \text{HF} \)
Explanation
Across a period (from carbon to fluorine), electronegativity increases, making the H-A bond progressively more polar and facilitating proton release. Thus, the correct order is \( \text{CH}_4 < \text{NH}_3 < \text{H}_2\text{O} < \text{HF} \).
