Mass Spectrometry and IR Spectroscopy

Mass spectrometry and infrared spectroscopy are complementary techniques because:

• Mass spectrometry provides information about the molar mass and formula while infrared spectroscopy helps identify the functional groups in the formula.

• Infrared spectroscopy provides information about the molar mass and formula while mass spectrometry helps identify the functional groups in the formula.

• Mass spectrometry provides information about the carbon-hydrogen framework while infrared spectroscopy helps identify the functional groups in the framework.

• Infrared spectroscopy provides information about the carbon-hydrogen framework while mass spectrometry helps identify the functional groups in the framework.

Mass spectrometry is not a spectroscopy technique because

• It absorbs light

• It emits light

• Does not absorb light

• Uses electromagnetic radiation

In Mass spectrometry molecules are bombarded with high energy

• Protons

• Neutrons

• X-ray beams

• Electrons

What are the steps of operation in the mass spectrometer?

• Accelerate, Deflect,Ionize, Detect
• Deflect,Ionize, Accelerate, Detect
• Ionize, Accelerate, Deflect, Detect
• Detect, Accelerate, Deflect, Ionize

What kind of particles are detected in mass spectrometry?

• Anions

• Cations

What ratio does the mass spectrometer detect?

• mass of main radical

• mass of molecular ion

• charge to mass ratio

• mass to charge ratio

Which species would get deflected by the greatest degree in the mass spectrometer?

• ¹²C⁺

• ¹³C⁺

• ¹²C²⁺

• ¹⁴C⁺

What do the peaks on the mass spectrum represent?

• anions
• different isotopes
• atoms with differing numbers of electrons
• numbers of electrons

How many isotopes are shown in this mass spectrum?

• 1
• 84
• 86
• 4

What do the heights of the peaks represent in the mass spectrum?

• number of isotopes
• relative abundance of each isotope
• average atomic mass
• charge:mass ratio