______ Which of the following reagent(s) could not be used to carry out the foll

Question

______ Which of the following reagent(s) could not be used to carry out the following transformation? A) Zn(Hg), HCl B) LiAlH_4, ether C) HSCH_2 CH_2 SH, BF_3; then Raney Ni (H_2) D) 1. NH_2 NH_2/H^+, 2. KOH/H_2 O/heat ______ Which of the following is the strongest acid? A) I B) II C) III D) IV E) V ______ Which of the following shows the correct order for steps in the Fischer esterification mechanism; A. proton transfer, nucleophilic attack, proton transfer, proton transfer, loss of leaving group, proton transfer B. proton transfer, nucleophilic attack, proton transfer, loss of leaving group, proton transfer, proton transfer C. nucleophilic attack, proton transfer, loss of leaving group, proton transfer, proton transfer, proton transfer D. proton transfer, loss of leaving group, proton transfer, proton transfer, nucleophilic attack, proton transfer

Explanation / Answer

18) A and D both the options are correct one is clemonson reduction and another one is wolf-kishner reductions.

19) among all the halides, F is more electronegative in nature compared with the other elements like Cl, Br and I. F attracts the electrons more easily than other halides which stabilizes the carbanion of this particular carboxilic acid after the donation of a proton. so F substituted compound(2-flouro-pentanoic acid) will have more acidic in nature.

20 ) A option is correct. H3O+ is an acid so it donates a proton to O which is in nucelophilic in nature so first step is proton transfer followed by nucleophilic attack because O in alcohol acts as a nucleophile followed by proton transfer, removal of leaving group and proton transfer.

Thank you and good luck.

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