KVV E-Modules

What is the role of the monochromator in IR spectroscopy?

A: Detecting the intensity of absorbed light B: Separating IR light into different wavelengths C: Heating the sample D: Generating IR radiation

FTIR is primarily used for:

A: Determining molecular weight B: Identifying functional groups in compounds C: Measuring melting point D: Estimating solubility

What does the 'IR' in FTIR stand for?

A: Internal Radiation B: Infrared Radiation C: Ion Resonance D: Infrared Reflection

Which region of the IR spectrum is referred to as the fingerprint region?

A: 4000–2500 cm⁻¹ B: 2500–2000 cm⁻¹ C: 2000–1500 cm⁻¹ D: 1500–400 cm⁻¹

In FTIR spectroscopy, the sample absorbs IR radiation at frequencies that correspond to:

A: Nuclear transitions B: Electronic transitions C: Molecular vibrations D: Ionic interactions

The most commonly used material for preparing solid samples in FTIR is:

A: Sodium sulfate B: Potassium bromide (KBr) C: Calcium carbonate D: Magnesium sulfate

FTIR instrument uses which mathematical technique to convert raw data into a spectrum?

A: Integration B: Fourier Transform C: Differentiation D: Matrix Multiplication

Which type of bond usually shows a strong and sharp absorption around 1700 cm⁻¹ in an FTIR spectrum?

A: O–H bond B: C=C bond C: C=O bond D: N–H bond

What is the advantage of FTIR over dispersive IR instruments?

A: It is more expensive B: It uses visible light C: It gives faster and more accurate results D: It does not require a detector

Which of the following is NOT an application of IR spectroscopy?

A: Identification of functional groups B: Determination of molecular mass C: Analysis of molecular structure D: Quantitative analysis of mixtures