1.

A student was asked by his teacher to separate an impure sample of sulphur containing sand as the impurity. He tried to purify it with the help of sublimation. But he was not successful. Particles of sulphur of sulphur could not be separated completely from sand. (i) Why did the sublimation process succeed ? (ii) Suggest an alternate method to affect the separation. (iii) What is the value based information associated with this ?

Answer» <html><body><p></p>Solution :(i) Sulphur is not of volatile nature. Upon heating it melts. Therefore, <a href="https://interviewquestions.tuteehub.com/tag/sublimation-1231130" style="font-weight:bold;" target="_blank" title="Click to know more about SUBLIMATION">SUBLIMATION</a> process could not succeed. <br/> (ii) The student should have dissolved the <a href="https://interviewquestions.tuteehub.com/tag/impure-1039183" style="font-weight:bold;" target="_blank" title="Click to know more about IMPURE">IMPURE</a> sample in carbon disulphide. It is a <a href="https://interviewquestions.tuteehub.com/tag/liquid-1075124" style="font-weight:bold;" target="_blank" title="Click to know more about LIQUID">LIQUID</a> in which sulphur completely dissolves while iron does not. From the solution, can be recovered with the help of crystallization process. <br/> (iii) The process of sublimation is useful only if one of the constituents present in the <a href="https://interviewquestions.tuteehub.com/tag/mixture-1098735" style="font-weight:bold;" target="_blank" title="Click to know more about MIXTURE">MIXTURE</a> can sublime while the others do not undergo sublimation.</body></html>


Discussion

No Comment Found

Related InterviewSolutions