Question

For the preparation of polycrystalline solids (i.e. powder), a mixture of solid starting materials directly react with each other in the solid state. What is the range of the temperature usually required for the solids to react together in Celsius?

(a) 25 to 37

(b) 1000 to 1500

(c) -25 to 0

(d) 2000 to 3000

This question was posed to me in an interview for job.

Asked question is from Solid State Reaction topic in division Preparative Methods of Solid State Chemistry

Answer 1

Correct option is (b) 1000 to 1500

To explain I would say: Solids don’t react usually at room temperature over normal scale timescale, It is required to heat them at much higher temperature often 1000◦C to 1500◦C, in order for a reaction to occur at an appreciable rate.