13. When CH3CH₂CHO reacts with PhNHNH₂ under conditions of acid catalysis, the major organic product is_______.(A) a nitrile (B) an imine(C) a hydrazone(D) an oxime (E) a ketone

7. Predict the specific rotation of the compound shown.(A) It is impossible to predict; it must be determined experimentally.(B) Because both asymmetric centers are R, the compound is dextrorotatory.(C) Because both asymmetric centers are S, the compound is dextrorotatory.(D) Zero; the compound is achiral.(E) Because this compound represents a racemic mixture, the compound is dextrorotatory.

13. When CH₃CH₂CHO reacts with PhNHNH₂ under conditions of acid catalysis, the major organic product is_______.
(A) a nitrile
(B) an imine
(C) a hydrazone
(D) an oxime
(E) a ketone

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