Question 40

A spectrophotometer can be used to measure the turbidity of a liquid by assessing the transmission of light through the sample.

A spectrophotometer is specifically designed to measure the amount of light that passes through a liquid sample, making it suitable for assessing turbidity by evaluating how much light is scattered or absorbed by the particles in the liquid.

A) Spectrophotometer

This option is correct because a spectrophotometer measures the intensity of light transmitted through a liquid sample. By analyzing how much light is absorbed or scattered by particles in the sample, it effectively quantifies the turbidity, providing valuable data about the clarity and quality of the liquid.

B) Microdensitometer

A microdensitometer is primarily used to measure the density of images or films, not liquids. It is not designed for measuring turbidity or the properties of liquid samples, making this option incorrect.

C) Electrophoresis apparatus

An electrophoresis apparatus is used for separating charged particles, such as DNA or proteins, in a gel matrix under an electric field. It does not measure turbidity or light transmission through liquids, hence this option is not relevant to the question.

D) Centrifuge

A centrifuge is used to separate components of a liquid mixture based on their density by spinning them at high speeds. While it can help in clarifying a solution, it does not measure turbidity through light transmission, making this option incorrect.

Conclusion

The spectrophotometer is the only tool among the options that directly assesses light transmission to measure turbidity in liquids. In contrast, the other options focus on different scientific processes and applications, thus failing to address the question's requirements.