1
In NMR spectroscopy, what is the product of Nuclear ‘g’ factor (gN), the nuclear magneton and the magnetic field strength (B0)?
Answer: energy of transition from alpha to beta state
Questions
2
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?
Answer: (a)
3
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?
Answer: 1:3
4
What will be the strength of coupling between geminal protons in the following molecules?
Answer: Increase as the size of ring increase
6
What are the number of signals in 1H NMR in the given molecules?
Answer: 2, 6, 4, 2 respectively
7
How many peaks are expected in low-resolution NMR spectrum of vinyl chloride and ethyl cyclopropane?
Answer: 3,5
8
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 μN = 5.05 x 10-27 JT-1)?
Answer: 60 MHz
9
At room temperature, what is the number of singlet resonances observed in the 1H NMR spectrum of Me3CC(O)NMe2 (N, N-Dimethylpivalamide)?
Answer: 3
10
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?
Answer: 4-methylanisole
