Advanced Instrumentation Technique

What does NMR stand for?

• Nuclear Magnetic Resonance

• Nuclear Mass Resonance

• Nuclear Magnetic Resonance

• None

In NMR spectroscopy, which of the following is not a common nucleus used for analysis?

• Hydrogen
• Carbon
• Oxygen
• Phosphorus

Which unit is commonly used to represent chemical shifts in NMR spectra?

• Hertz (Hz)
• Parts per million (ppm)
• Kilohertz (kHz)
• Megahertz (MHz)

In a 1H NMR spectrum, how many signals would you expect to observe for a compound with three distinct types of hydrogen atoms?

• 1
• 2
• 3
• 4

Which region of the NMR spectrum typically corresponds to high-frequency signals?

• Downfield
• Upfield
• Middlefield
• None

In NMR spectroscopy, what does the term "chemical shift" refer to?

• The movement of atoms in the sample
• The displacement of the NMR signal along the frequency axis
• The change in temperature during the experiment
• The duration of time the sample is exposed to the magnetic field

Which NMR technique is commonly used for determining the structure of organic compounds?

• 13C NMR
• 1H NMR
• DEPT
• COSY

Which of the following is not a factor that affects chemical shift in NMR spectroscopy?

• Electronegativity
• Hybridization
• Molecular weight
• Magnetic anisotropy

Which technique is used to enhance signal resolution in NMR spectra by removing unwanted signals?

• FT-NMR
• NOESY
• COSY
• Presaturation

Which NMR experiment is used to measure coupling constants between nuclei?

• COSY
• HSQC
• NOESY
• J-modulated