Infrared and Mass Spectroscopy Quiz

What is the range of the fingerprint region in infrared spectroscopy?

• 1500–500 cm⁻¹

• 3300–3500 cm⁻¹

• 2500–3000 cm⁻¹

• 750–1100 cm⁻¹

Which bond has an infrared absorption range of 3230–3550 cm⁻¹?

• N–H (amines)

• O–H (alcohols)

• C=O

• C–C

What is the main use of IR spectroscopy in the fingerprint region?

• Identifying individual bonds

• Determining molecular weight

• Comparing to a database of known IR spectra

• Measuring transmittance

What is the wavenumber range for C=C bonds in infrared spectroscopy?

• 3300–3500 cm⁻¹

• 1680–1750 cm⁻¹

• 1620–1680 cm⁻¹

• 750–1100 cm⁻¹

Which spectroscopic technique is used to determine the molecular formula of a compound?

• Infrared spectroscopy

• Mass spectroscopy

• Ultraviolet spectroscopy

• Nuclear magnetic resonance

What is the peak with the highest m/z value in mass spectroscopy called?

• Base peak

• Molecular ion

• Fragment ion

• Parent ion

What is the wavenumber range for C=O bonds in infrared spectroscopy?

• 3300–3500 cm⁻¹

• 1680–1750 cm⁻¹

• 2500–3000 cm⁻¹

• 750–1100 cm⁻¹

What is the purpose of high resolution mass spectroscopy?

• To measure transmittance

• To find the molecular formula with high accuracy

• To identify isotopes

• To determine bond angles

Which bond has an infrared absorption range of 2500–3000 cm⁻¹?

• N–H (amines)

• O–H (acids)

• C–H

• C=C

What is the range for N–H (amines) in infrared spectroscopy?

• 3300–3500 cm⁻¹

• 3230–3550 cm⁻¹

• 2500–3000 cm⁻¹

• 750–1100 cm⁻¹