SATHEE: Equilibrium Question 834

Equilibrium Question 834

Question: Which one of the following arrangements represents the correct order of the proton affinity of the given species:

Options:

A) $I^{-} < F^{-} < H S^{-} < N H_{2}^{-}$

B) $H S^{-} < N H_{2}^{-} < F^{-} < I^{-}$

C) $F^{-} < I^{-} < N H_{2}^{-} < H S^{-}$

D) $N H_{2}^{-} < H S^{-} < I^{-} < F^{-}$

Show Answer

Answer:

Correct Answer: A

Solution:

The species with the greatest proton affinity will be the strongest base, and its conjugate acid will be the weakest acid. The weakest acid will have the smallest value of $K_{a}$ . Since HI is a stronger acid than HF which is a stronger acid than $H_{2} S$ , a partial order of proton affinity is $I^{-} < F^{-} < H S^{-}$ Since $N H_{3}$ is a very weak acid, $N H_{2}^{-}$ must be a very strong base. Therefore the correct order of proton affinity is $I^{-} < F^{-} < H S^{-} < N H_{2}^{-}$

Equilibrium Question 834

Question: Which one of the following arrangements represents the correct order of the proton affinity of the given species:

Options:

Answer:

Solution:

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Equilibrium Question 834

Question: Which one of the following arrangements represents the correct order of the proton affinity of the given species:

Options:

Answer:

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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