MolSynapsequestion bank

MolSynapse / Question bank / Structural Identification and Practical Organic Chemistry / Degree of unsaturation and spectroscopic clues

JEE Main levelSingle correct optionDifficulty 2 of 3si070

The number of signals in the $^{1}$ H NMR spectrum of 1,4-dimethylbenzene ( $p$ -xylene) is

A2
B1
C3
D4

Answer: A

The two methyl groups are equivalent (6 H, one signal). The four aromatic hydrogens are equivalent by symmetry (one signal). Total = 2 signals.

Practice Structural Identification and Practical Organic Chemistry More on Degree of unsaturation and spectroscopic clues

Previous questionNext question

More questions on Degree of unsaturation and spectroscopic clues

The degree of unsaturation of C7H7NO2 is JEE Main level
Calculate the degree of unsaturation of C9H10ClNO3 (give the nearest integer). JEE Main level
A compound C6H10 takes up only one mole of H2 per mole over Pd/C under mild conditions (rings are not opened) to give C6H12. The compound co... JEE Main level
The number of signals in the ^13C NMR spectrum of 1,3,5-trimethylbenzene is JEE Main level
Which compound shows a medium, sharp infrared band near 2250 cm^-1? JEE Main level
In the mass spectrum of 1,2-dibromoethane, BrCH2CH2Br, the molecular ion cluster M : M+2 : M+4 has intensities in the approximate ratio JEE Main level