Question

Assertion: In the colloidal state, medicines work more effectively.
Reason: Medicines are easily absorbed in the colloidal state.
A. Both assertion and reason are correct and the reason is the correct explanation of assertion.
B. Both assertion and reason are correct but the reason is not the correct explanation of assertion.
C. Assertion is incorrect but the reason is correct.
D. Both assertion and reason are correct.

Answer 1

The effectiveness of medicine depends upon easy incorporation, absorption and digestion. Colloidal state due to the large surface area incorporated and absorbed easily.

Complete step by step answer:
A colloid is a mixture in which a phase remains dispersed in the suspension. The size of colloidal particles varies from 1 to 1000 nm. Due to large size, the colloid solution contains the different phases of suspended particle and suspension medium.
For example, milk, in which the fat particle remains suspended in water-based solution. The fat particles are not completely soluble in water-based solution and are large in size.
Due to the large size of suspended particles colloidal states have large surface areas. Whereas in the case of true solutions, the size of particles is very small, the particles of true solutions have very little surface area.
Due to the large surface area, the colloidal state interacts more with the body part which increases the chance of more absorption of the medicine and thus the medicines work more effectively in the colloidal state.
Thus, in colloidal state medicines work effectively because due to the large surface areas the medicine is absorbed easily.
Therefore, both the assertion and reason are correct and the reason is the correct explanation of assertion.
Therefore the option (A) is correct.

Additional information : Due to the large size of the colloidal particle, the colloidal state cannot easily pass through the various membranes of the body thus it provides more time to the interaction of the drug with the body.

Note:
The effectiveness of a drug in the body depends upon the easy and more interaction of the drug with the body. Due to the large surface area, colloidal state provides more absorption of the drug in the body whereas this will not be true in the case of a true solution because the size of particles in the true solution is very small.