For hydrides of elements in the same period, acidic strength increases with the electronegativity of the central atom. Increased electronegativity of the central atom leads to a more stable conjugate base.
The correct increasing order of acidic strength will be - - $\text{CH}_4 < \text{NH}_3 < \text{H}_2\text{O} < \text{H-F}$ - $\text{H-F} < \text{NH}_3 < \text{H}_2\text{O} < \text{CH} _4$ - $\text{H}_2\text{O} < \text{CH}_4 < \text{NH}_3 < \text{H-F}$ - $\text{NH}_3 < \text{H}_2\text{O} < \text{CH}_4 < \text{H-F}$ - Question not attempted
Asked in Department Recruitment 2024 (Chemist) 2024 · Topic: Acid, Base and Salt (Strength of Acids and Bases (Strong and Weak Acids/Bases))
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Answer: A. $\text{CH}_4 < \text{NH}_3 < \text{H} _2\text{O} < \text{H-F}$
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