Quiz on Colorimetry Principles

What does Beer’s law state regarding the intensity of transmitted light?

• It decreases exponentially with the increase in concentration of colored substance.

• It increases linearly with the concentration of colored substance.

• It remains constant regardless of concentration.

• It decreases with the increase in temperature.

What does Lambert’s law state about the intensity of transmitted light?

• It decreases exponentially with the increase in length of light pathway.

• It increases with the increase in light intensity.

• It is unaffected by the length of the light path.

• It decreases with the increase in concentration.

What is the purpose of the standard curve in colorimetry?

• To check if the method follows Beer’s Law.

• To determine the color of the solution.

• To measure the temperature of the solution.

• To calibrate the light source.

What is the wavelength range for the color yellow?

• 581 – 595 nm

• 596 – 650 nm

• 651 – 780 nm

• < 380 nm

What is the function of a monochromator in colorimetry?

• To convert polychromatic light into monochromatic light.

• To measure the absorbance of light.

• To generate light of different wavelengths.

• To filter out unwanted colors.

What are the essential parts of a colorimeter?

• Light source, adjustable aperture, cuvette, detector.

• Light source, prism, lens, mirror.

• Cuvette, filter, amplifier, meter.

• Detector, computer, printer, light source.

What is the optical path length of a cuvette?

• 1 cm

• 2 cm

• 3 cm

• 5 cm

What is the role of photosensitive detectors in colorimetry?

• To convert light energy to electrical energy.

• To measure the temperature of the solution.

• To filter the light before it enters the cuvette.

• To amplify the light signal.

What is a single beam colorimeter?

• A device that uses one light source to measure absorbance.

• A device that uses multiple light sources.

• A device that measures color without a light source.

• A device that requires two cuvettes.

What are the merits of a single beam colorimeter?

• Simple in construction and easy to operate.

• High precision and accuracy.

• Can measure multiple samples at once.

• Requires no calibration.