Q. A copper-aluminium diffusion couple develops a certain concentration profile after an isothermal treatment at 600°C for 10 hours. The time required to achieve the same concentration profile at 500°C is ______________(in hours to 1 decimal place)
Given: The interdiffusion coefficient for copper in aluminium at 500°C and 600°C are 4×10-14 m2s-1 and 8×10-13 m2s-1.
![Determine the correctness (or otherwise) of the following Assertion [A] and the Reason [R]](https://www.gkseries.com/blog/wp-content/uploads/2023/10/Determine-the-correctness-or-otherwise-of-the-following-Assertion-A-and-the-Reason-R.jpg)
