Answers
Tiny Peak at around 11 ppm indicate probably COOH group. This can also ascertained by peak 170 ppm in c13 nmr
there are lot so overlapping peak in 7-8 ppm in 1H nmr and 120-130 ppm in c13 nmr both confirms the presence of aromatic ring benzene
finally there is singlet at around 2-3 ppm which is due to Me attached with benzene which causes deshielding of Me
so the probable structure will be
p-methyl benzzoic acid
COOH 4-methylbenzoic acid
.
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