TechMeth Quiz

Which type of microscope uses visible light to illuminate the sample?

• Electron Microscope

• Fluorescence Microscope

• Light Microscope

• Confocal Microscope

What is the primary advantage of a scanning electron microscope (SEM)?

• Ability to view living cells

• High-resolution 3D surface imaging

• Visualization of atomic structures

• Uses light for magnification

Which of the following is used to visualize the internal structure of cells?

• Polarizing microscope

• Transmission electron microscope (TEM)

• Compound microscope

• Scanning probe microscope

The resolving power of a microscope depends on:

• The type of sample preparation

• The magnification

• The wavelength of the illumination source

• The size of the specimen

Which technique is commonly used to identify crystalline structures in materials?

• Darkfield microscopy

• Polarized light microscopy

• Brightfield microscopy

• Phase contrast microscopy

What does UV-Vis spectroscopy measure?

• Vibrations of molecules

• Absorption of visible and ultraviolet light

• Emission of X-rays

• Nuclei in a magnetic field

Which spectroscopy technique is based on the interaction of light with the vibrational modes of molecules?

• Fluorescence spectroscopy

• Mass spectrometry

• Raman spectroscopy

• Nuclear Magnetic Resonance (NMR) spectroscopy

What is the primary purpose of mass spectrometry?

• Determining molecular weight and structure

• Measuring the absorbance of light

• Identifying radioactive elements

• Detecting fluorescence in molecules

Which principle is chromatography based on?

• Absorption and reflection

• Separation of components based on their affinity for stationary and mobile phases

• Light scattering

• Mass to charge ratio

In gas chromatography, the mobile phase is typically:

• A liquid

• A solid

• An inert gas

• A mixture of solvents