List of top Inorganic Chemistry Questions on NMR and ESR spectroscopy asked in GATE Chemistry

¹H NMR spectrum of a mixture containing CH₃Br (x mol) and (CH₃)₃CBr (y mol) shows two singlets at 2.7 ppm and 1.8 ppm, with the relative ratio of 3:1 (integration value), respectively. The value of x/y is ______.
(rounded off to the nearest integer)

Among the following, the NMR active nucleus (nuclei) is (are)