MolSynapsequestion bank

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

JEE Advanced levelOne or more correct optionsDifficulty 3 of 3si096

Which of the following show exactly two signals in the $^{1}$ H NMR spectrum (count each set of chemically equivalent hydrogens)?

A1,4-dimethylbenzene
B2,2-dimethylpropanal, $(CH X_{3}) X_{3} CCHO$
Cethyl ethanoate, $CH X_{3} COOCH X_{2} CH X_{3}$
D1,3,5-trimethylbenzene

Answer: A, B, D

1,4-Dimethylbenzene: methyl and aromatic H = 2.

(CH X_{3}) X_{3} CCHO

: nine methyl H and one CHO H = 2. 1,3,5-Trimethylbenzene: methyl and aromatic H = 2. Ethyl ethanoate has

CH X_{3} CO

,

OCH X_{2}

and

CH X_{3}

= 3 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