Mass Spectrometry

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

In electron impact ionisation method in MS it produces _____ in the first step

• Cation

• Anion

• Radical

• Cation radical

Highest mass to charge peak in Mass spectra is called

• Base peak

• Molecular ion peak

• Isotopic peak

• Fragment peak

High abundant fragment peak in Mass spectra is called as

• Molecular ion peak

• Isotopic peak

• Base peak

• Fragment peak

Relative abundance of all fragment ions are measured with reference to

• Molecular ion peak

• Base peak

• Isotopic peak

• None of the above

Isotopic peak ratio of chlorine containing fragments in Mass spectra will be in

• 1:1

• 2:1

• 3:1

• 4:1

Isotopic peak ratio of bromine containing fragments in Mass spectra will be in

• 1:1

• 2:1

• 3:1

• 4:1

Molecular ion peak of ethylamine in Mass spectra will be observed at

• Even mass

• Odd mass

• Fraction mass

• Not definite

Identify the base peak in the given Mass spectrum

• 100

• 99

• 82

• 57