HNMR Spectroscopy

H-NMR spectroscopy deals with the interaction of organic molecule with:

• infrared radiation
• ultraviolet radiation
• radio waves
• gamma radiation

Interaction of radio waves with organic molecule will result in change in the spin of :

• electrons
• photons
• neutrons
• protons

What is the multiplicity of the signal for the hydrogens on the methyl group in CH₃CH₂OH?

• quartet
• singlet
• triplet
• doublet

What is the multiplicity of the signal for the hydrogens on the methylene group in CH₃CH₂OH?

• quartet
• singlet
• triplet
• doublet

What is the multiplicity of the signal for the hydrogens on the hydroxyl group in CH₃CH₂OH?

• quartet
• singlet
• triplet
• doublet

NMR stands for:

• Nuclear Magnetic Radiation
• Nuclear Magnetic Reaction
• Nuclear Magnetic Resonator
• Nuclear Magnetic Resonance

HNMR spectrum is a plot between:

• Chemical shift and signal intensity
• Signal intensity and frequency
• Chemical shift and wavelength
• Chemical shift and frequency

If spin of the nucleus is parallel to the magnetic field, the state is known as:

• parallel spin & aligned state

• antiparallel spin & aligned state

• perpendicular spin
• random spin

The anti aligned high spin state of proton occurs when

• When the proton's spin is parallel to the spin of the electron in a different orbital.
• When the proton's spin is opposite to the spin of the electron in a different orbital.
• When the proton's spin is opposite to the direction of magnetic field

• When the proton's spin is parallel to the direction of magnetic field

What is used as a reference in HNMR spectroscopy?

• TMS
• DMSO
• water
• ethanol