Forensic Science MCQs

What is the primary function of a colorimeter?

• Measure temperature

• Identify DNA sequences

• Measure absorbance of colored solutions

• Detect radioactivity

Which part of a colorimeter selects the wavelength of light?

• Detector

• Filter

• Cuvette

• Sample holder

Which type of light source is typically used in a colorimeter?

• UV lamp

• Laser

• Tungsten filament lamp

• LED

In a colorimeter, what is the function of the cuvette?

• Generates light

• Holds the sample solution

• Measures absorbance

• Filters light

Which of the following factors can affect the accuracy of colorimeter readings?

• Ambient temperature

• Dust particles

• Fingerprints on cuvette

• All of the above

The Beer-Lambert Law establishes a relationship between absorbance and:

• Time

• Pressure

• Concentration

• pH

Which of the following equations represents the Beer-Lambert Law?

• A = ε × T × C

• A = ε × l × C

• A = ε/C

• A = l/ε × C

In the Beer-Lambert Law, 'A' stands for:

• Area

• Absorbance

• Amplitude

• Attenuation

What does 'ε' (epsilon) represent in Beer-Lambert Law?

• Path length

• Volume

• Molar absorptivity

• Transmittance

If the concentration of a solution increases, what happens to the absorbance according to Beer's Law?

• It decreases

• It increases

• Remains unchanged

• Becomes zero