The diameter of colloidal particle ranges from: (a) \(10^{-9} \mathrm{~m}\) to \(10^{-6} \mathrm{~m}\) (b) \(10^{-6} \mathrm{~m}\) to \(10^{-3} \mathrm{~m}\) (c) \(10^{-12} \mathrm{~m}\) to \(10^{-9} \mathrm{~m}\) (d) \(10^{-3} \mathrm{~m}\) to \(10^{-6} \mathrm{~m}\)

Colloidal chemistry is essential in understanding the properties and behavior of colloidal systems, which consist of finely divided particles dispersed in a continuous medium. These particles, known as colloids, can be solid, liquid, or gaseous. The size of colloidal particles is critical as it defines the boundary between true solutions and coarse suspensions, with colloids falling in the intermediate range.

The particles within a colloidal solution – like the fog in the air, or the colloidal gold used in medical diagnostics – exhibit unique interactions due to their size. The surface area to volume ratio of colloids is high, which affects their absorption, catalysis, and reactivity properties significantly. This is why understanding the size range of colloidal particles is so pivotal; it impacts phenomena such as Brownian motion, Tyndall effect, and electrostatic stabilization that can be observed in colloidal systems.

In the context of the textbook exercise, recognizing the size range helps students relate these fundamental concepts to real-world applications, like water purification and the creation of paints or inks, broadening their comprehension of colloidal chemistry's impact on various industries.

Conversion between nanometers (nm) and meters (m) is a foundational skill in science, particularly when dealing with the microscopic scale of phenomena. One nanometer is one billionth of a meter, which we express in scientific notation as 1 nm = \(10^{-9}\) m.

Understanding this conversion allows us to seamlessly switch between the units of measurement depending on the context. For scientific clarity and convenience, nanometers are typically used when discussing entities like atoms, molecules, and colloidal particles, while meters are the standard for larger, macroscopic objects.

To solve the exercise related to colloidal particle size, students must confidently convert nanometers to meters, as this allows them to correctly identify the size range of colloidal particles by comparing the converted meter values against the given options. This skill is not only useful for this problem but also a valuable tool for any scenario requiring precision at such small scales, including research and technological development.

Preparing for competitive exams like NEET (National Eligibility cum Entrance Test) requires a strong foundation in Chemistry, including topics like colloidal chemistry. Students should focus on conceptual understanding and apply this knowledge to problem-solving.

A detailed study plan that covers the NEET Chemistry syllabus methodically and incorporates regular revision and practice tests is crucial. Understanding core concepts and their applications can make a significant difference in performance. Dealing with questions related to colloidal particle sizes, as presented in our exercise, is one aspect of preparing for questions that test both conceptual knowledge and analytical skills.

Using resources like textbooks, supplementary guides, and practicing with exercises, including conversion of measurement units as part of chemistry problem-solving tasks, is essential. By mastering topics systematically, students are better equipped to tackle complex questions during the actual NEET examination.