Question

Overall transformation rate changes with temperature as follows under what condition?

(a) Decreases

(b) Increases then decreases

(c) Follows a linear path

(d) Increases with temperature

This question was addressed to me in a job interview.

My doubt stems from Two Component System in section Phase Rule of Engineering Chemistry I

Answer 1

Right answer is (b) Increases then decreases

Easiest explanation: According to the phase graph, at the solidus region, the temperature is high. As the melting point increases, the temperature decreases and vice versa (applicable to all component systems).