In the proton nmr spectra of aldehydes and ketones, the protons bonded to carbons adjacent to the carbonyl group typically fall into which of the chemical shift ranges below?
a) 1.0-2.0 ppm
b) 2.0-3.0 ppm
c) 4.0-4.5 ppm
d) 7.0-8.0 ppm
e) 9.0-10.0 ppm

B) 2.0-3.0 ppm

Explanation:

the carbons which are adjacent to the carbonyl group have protons  which is common characteristic between aldehydes and ketones during NMR absorption.

carbons adjacent to the carbonyl group typically fall into which of the chemical shift ranges  between 2.0 -3.0 ppm

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explanation:

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)