Question

Which of the following is correct for hydrothermal method. Hydrothermal method need to be carried out in________________

(a) Open container

(b) Closed container

(c) In a test tube

(d) In conical flask

This question was posed to me in final exam.

I need to ask this question from High Pressure and Hydrothermal Methods topic in chapter Preparative Methods of Solid State Chemistry

Answer 1

Correct choice is (b) Closed container

To explain: Hydrothermal methods must be always carried out in a closed vessel, that is why the pressure and temperature relations of water should be kept in such a way that the volume must remain constant, it is a very important factor.