Explore topic-wise MCQs in Organic Chemistry.

This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Organic Chemistry knowledge and support exam preparation. Choose a topic below to get started.

1.

An organic compound (MF; C8H10O) exhibited the following 1H NMR special data: 62.5 (3H, s), 3.8 (314, s), 6.8 (2H, d, J 8 Hz), 7.2 (2H, d, J 8 Hz) ppm. What will be the compound among the choices?

A. 4-ethylphenol
B. 2-ethylphenol
C. 4-methylanisole
D. 4-methylbenzyl alcohol
Answer» D. 4-methylbenzyl alcohol
Discussion
2.

At room temperature, what is the number of singlet resonances observed in the 1H NMR spectrum of Me3CC(O)NMe2 (N, N-Dimethylpivalamide)?

A. 3
B. 4
C. 5
D. 2
Answer» B. 4
Discussion
3.

What will be the NMR frequency in MHz of bare 1H in a magnetic field of intensity 1.4092 tesla (given gN = 5.585 and N = 5.05 x 10-27 JT-1)?

A. 60 MHz
B. 120 MHz
C. 100 MHz
D. 15 MHz
Answer» B. 120 MHz
Discussion
4.

How many peaks are expected in low-resolution NMR spectrum of vinyl chloride and ethyl cyclopropane?

A. 3,5
B. 5,3
C. 6,3
D. 3,6
Answer» B. 5,3
Discussion
5.

What is the value of gyramagnetic ratio of proton?

A. 41.10 radian/Tesla
B. 42.57 MHz/Tesla
C. 26.75 radian/Tesla
D. 41.10 MHz/Tesla
Answer» C. 26.75 radian/Tesla
Discussion
6.

The 1H NMR spectrum of a dilute solution of a mixture of acetone and dichloromethane in CDCl3 exhibits two singlets of 1:1 intensity. What will be the molar ratio of acetone to dichloromethane in the solution?

A. 3:1
B. 1:3
C. 1:1
D. 1:2
Answer» C. 1:1
Discussion
7.

An organic compound having the molecular formulae C10H14 exhibited two singlets in the 1H NMR spectrum and three signals in the 13C NMR. What is the compound?

A. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-mcqs-q2a.png"><img alt="Organic compound exhibited two singlets in 1H NMR spectrum &amp; three signals - option a" class="alignnone size-full wp-image-224133" height="92" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-mcqs-q2a.png" width="90"/></a>
B. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-mcqs-q2b.png"><img alt="Organic compound exhibited two singlets in 1H NMR spectrum &amp; three signals - option b" class="alignnone size-full wp-image-224134" height="93" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-mcqs-q2b.png" width="90"/></a>
C. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-mcqs-q2c.png"><img alt="Organic compound exhibited two singlets in 1H NMR spectrum &amp; three signals - option c" class="alignnone size-full wp-image-224135" height="96" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-mcqs-q2c.png" width="86"/></a>
D. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-mcqs-q2d.png"><img alt="Organic compound exhibited two singlets in 1H NMR spectrum &amp; three signals - option d" class="alignnone size-full wp-image-224136" height="65" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-mcqs-q2d.png" width="132"/></a>
Answer» B. <a href="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-mcqs-q2b.png"><img alt="Organic compound exhibited two singlets in 1H NMR spectrum &amp; three signals - option b" class="alignnone size-full wp-image-224134" height="93" src="https://www.sanfoundry.com/wp-content/uploads/2018/08/organic-chemistry-questions-answers-mcqs-q2b.png" width="90"/></a>
Discussion
8.

In NMR spectroscopy, what is the product of Nuclear g factor (gN), the nuclear magneton and the magnetic field strength (B0)?

A. energy of transition from alpha to beta state
B. chemical shift
C. spin-spin coupling constant
D. magnetogyric ratio
Answer» B. chemical shift
Discussion