Test Paper Version B 16. What major produot is formed in the reaction shown belo

Question

Test Paper Version B 16. What major produot is formed in the reaction shown belown 1. CH MgBr 2. HS 17. Rank the following in order of decreasing rate of hydrolysis L acetyl chloride Il. acetic anhydride IL ethyl acetate V. acetamide 18. Which one of the following does not react with benzoyl chloride (CaHscocy NH B. CHaNHa 19. What reagent would you use for the following transformation? A, L?AIH. B.NaBH4 C. DIBAL-H D. LiAIH(Ot-Bu)a 20. Which of the following has the highest percentage of enol in a keto-enol equilibrium? A. 2,4-hexanedione B.hexanal C. 2-hexanone acyl chlorides and nucleophiles? A. Aldehydes are readily oxidized by nucleophiles to carboxylic acids D. Acyl chlorides have a leaving group, cr, whereas aldehydes do not D. 2,5-hexanedione 21. How are reactions between aldehydes and nucleophiles fundamentally different from reactions between lorides readily form enol tautomers do not form tetrahedral intermediates with nucleophiles 22. Which of the following compounds, on reaction with aqueous sodium hydroxide, yields sodium butanoe CHsCH2CH2CO2Na, at the slowest rate? D. CH3CH2CH2CO2 23. What is the product of the following reaction? Test paper version B Page 3

Explanation / Answer

16) option B is correct

Explanation: Reaction of Grignard reagent with -CN produes ketone as product.

17) option A is correct

Explanation: acid chlorides can hydrolyze at faster rate due to the more electron withdrawing nature of -Cl atom. amides are least reactive due to more electronegative nature of nitrogen.

18) option D does not react with benzoyl choride

19) The reagent is DIBAL-H. option C is correct

Explanation: DIBAL-H is a selective reducing agent which reduces nitrile to aldehyde.

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