26. Consider ①Cl-, ②OH-, ③SH-, and④CH3-. The CORRECT order of nucleophile reactivity is (strongest nucleophile LAST): (A)④③②① (B)④②①③ (C)②①③④ (D)①②③④ (E)①③④②

26. Consider ①Cl^-, ②OH^-, ③SH^-, and④CH₃^-. The CORRECT order of nucleophile reactivity is (strongest nucleophile LAST):
(A)④③②①
(B)④②①③
(C)②①③④
(D)①②③④
(E)①③④②

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統計： A(2), B(1), C(0), D(2), E(0) #2241199

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法老漢堡包

B2 · 2026/02/19

#7301387

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2. Ninhydrin is the hydrate of a triketone and is in equilibrium with it.In the following statements which one is TRUE? (A) Ninhydrin is a good reagent for testing α-amino acids, usually carried out at acidic condition. (B) The positive ninhydrin test usually exhibits an intense purple color. (C) Ninhydrin is a good reagent for testing nucleosides, usually carried out at basic condition. (D) The positive ninhydrin test usually exhibits a red color. (E) The positive ninhydrin test usually exhibits a green color.

26. Consider ①Cl^-, ②OH^-, ③SH^-, and④CH₃^-. The CORRECT order of nucleophile reactivity is (strongest nucleophile LAST):
(A)④③②①
(B)④②①③
(C)②①③④
(D)①②③④
(E)①③④②

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