Question

Stress is caused or generated internally by the consequence of chemical reaction taking place in the crystal, one of its example is occurrence of phase transitions during __________

(a) Change in concentration

(b) Change in solubility

(c) Change in force

(d) Change in temperature

This question was addressed to me in an interview for internship.

Enquiry is from Effect of Stress on a Powder Pattern in portion X-Ray Diffraction of Solid State Chemistry

Answer 1

Right answer is (d) Change in temperature

The explanation: Phase transition occurs I the crystals during cooling (if there is a change in the volume or shape of the crystals and they are embedded in a solid matrix, then the rigid environment of the matrix may prevent the transition from occurring to completion).