pK\(_a\) increases in the order .........
Show Hint
- NH\(_3\)>NH\(_3\)OH\(^+\)>N\(_2\)H\(_5^+\)>NH\(_3\)
- NH\(_3\)OH\(^+\)>N\(_2\)H\(_5^+\)>NH\(_3\)>NH\(_3\)
- NH\(_3\)>NH\(_3\)OH\(^+\)>N\(_2\)H\(_5^+\)>NH\(_3\)
- NH\(_3\)>N\(_2\)H\(_5^+\)>NH\(_3\)>NH\(_3\)OH\(^+\)
The Correct Option is A, B, C, D
Solution and Explanation
pK\(_a\) is a measure of the acidity of a substance. A higher pK\(_a\) indicates a weaker acid. In this case, we are comparing ammonia (NH\(_3\)) and its derivatives in various protonation states.
Step 2: Analyzing the options.
(A) NH\(_3\)>NH\(_3\)OH\(^+\)>N\(_2\)H\(_5^+\)>NH\(_3\): Correct — This correctly ranks the compounds based on their acidity (pK\(_a\) values).
(B) NH\(_3\)OH\(^+\)>N\(_2\)H\(_5^+\)>NH\(_3\)>NH\(_3\): Incorrect — The order is incorrect.
(C) NH\(_3\)>NH\(_3\)OH\(^+\)>N\(_2\)H\(_5^+\)>NH\(_3\): Incorrect — The order is incorrect.
(D) NH\(_3\)>N\(_2\)H\(_5^+\)>NH\(_3\)>NH\(_3\)OH\(^+\): Incorrect — The order is incorrect.
Step 3: Conclusion.
The correct answer is (A) NH\(_3\)>NH\(_3\)OH\(^+\)>N\(_2\)H\(_5^+\)>NH\(_3\).
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