Question

Match the different transformations/reactions in Column I with the most suitable information in Column II. 

• A. P-2; Q-3; R-1
• B. P-1; Q-2; R-3
• C. P-2; Q-1; R-3
• D. P-3; Q-2; R-1

Hint:

Eutectoid reactions involve the transformation of one solid phase into two solid phases, Martensitic transformations occur without diffusion, and precipitation reactions form solid phases from supersaturated solutions.

Answer 1

The Correct Option is C

Let's break down the different transformations and reactions mentioned in Column I: 1. Eutectoid reaction: - The eutectoid reaction occurs when a single solid phase transforms into two new solid phases. This type of reaction is typical in alloys and is often represented as a phase transformation in a binary system at a specific temperature and composition. Hence, this corresponds to (2) "one solid phase transforms into two solid phases". 2. Martensitic transformation: - Martensitic transformation is a diffusionless phase change that occurs when the crystal structure of a material changes due to temperature changes, typically in steels. Since this transformation occurs without diffusion, it is best matched with (3) "occurs in supersaturated solutions". 3. Precipitation reaction: - Precipitation is the process where a solid phase forms from a supersaturated solution. This is a common process in materials science, especially in alloying and crystallization. Thus, the correct match is (1) "involves no diffusion".
Thus, the correct matches are: - P-2 (Eutectoid reaction involves transforming one solid phase into two solid phases) - Q-3 (Martensitic transformation occurs in supersaturated solutions) - R-1 (Precipitation reaction involves no diffusion) Therefore, the correct answer is (A).
Final Answer: (A) P-2; Q-3; R-1