SATHEE: Equilibrium Question 803

Equilibrium Question 803

Question: What is the decreasing order of basic strengths of $O H^{-}, N H_{2}^{-}, H - C \equiv C^{-}$ and $C H_{3} - C H_{2}^{-}$

Options:

A) $C H_{3} - C H_{2}^{-} > N H_{2}^{-} > H - C \equiv C^{-} > O H^{-}$

B) $H - C \equiv C^{-} > C H_{3} C H_{2}^{-} > N H_{2}^{-} > O H^{-}$

C) $O H^{-} > N H_{2}^{-} > H - C \equiv C^{-} > C H_{3} - C H_{2}^{-}$

D) $N H_{2}^{-} > H - C \equiv C^{-} > O H^{-} > C H_{3} - C H_{2}^{-}$

Show Answer

Answer:

Correct Answer: A

Solution:

Follow Lowry Bronsted concept for conjugate pair. Acid strength follows the order $H_{2} O > C_{2} H_{2} > N H_{3} > C_{2} H_{6}$ conjugate base will follow the order $C_{2} H_{5}^{-} > N H_{2}^{-} > C_{2} H^{-} > O H^{-}$

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Equilibrium Question 803

Question: What is the decreasing order of basic strengths of OH−,NH2−,H−C≡C− and CH3−CH2−

Options:

Answer:

Solution:

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Question: What is the decreasing order of basic strengths of $O H^{-}, N H_{2}^{-}, H - C \equiv C^{-}$ and $C H_{3} - C H_{2}^{-}$