please give a simple direct answer , ( do not give explanation ) An unknown comp

Question

please give a simple direct answer , ( do not give explanation )

An unknown compound shows an intense absorption near 1700cm-1 in the if and gives the following nmr spectrum: 1.I ppm doublet, 6H 2.1 ppm singlet, 3h 2.3-2.8 ppm broad multiple, 1H Which structure is consistent with the above data? Which one of the following molecules can be described as being a "Z" isomer? Which reagent(s) would best accomplish the following transformation? a. H_3O^+ & heat b. (i) HgSO_4 in H_2O (ii) NaBH_4 c. (i) BH_3 (ii) H_2O_2 and oOH^- d. (i) HOBr (ii) Mg in ether

Explanation / Answer

Q. 8) correct option is (a) because it contains 6-CH3-hydrogen which gives one doublet signal at 1.1 ppm, and have one 3'-carbon-hydrogen surrounded by 6-H neighbouring hydrogen , it gives broad multiplet at 2.3-2.8,and have 3-CH3 hydrogen , have no neighbouring hydrogen gives singlet at 2.1 ppm.

Q. 9) correct option is (b) .

Q. 10) correct option is (b) .

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