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Acid Base Equilibrium

3. Acids and Bases / Acid Base Equilibrium / Problem 3

Which of the compounds given below can be deprotonated by CH₃O⁻ in an acid-base reaction that favors product formation? (pK_a of CH₃OH = 15.9)
(i) HCOOH (pK_a = 3.7)
(ii) CH₃NH₂ (pK_a = 40)
(iii) NH₄⁺ (pK_a = 9.4)
(iv) HC≡CH (pK_a = 25)

A

(i), (ii), (iii) and (iv)

B

(i), (ii) and (iii)

C

(i) and (iii)

D

(ii) and (iv)

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