Q. The commercial method of preparation of potassium by reduction of molten KCI with metallic sodium at 850​ °C is based on the fact that
(A) potassium is solid and sodium distils off at 
850​ °C
(B) potassium being more volatile and distils off thus shifting the reaction forward
(C) sodium is more reactive than potassium 
850​ °C
(D) sodium has less affinity to chloride ions in the presence of potassium ion

 

Dear Student,

The limitation of the given commercial method is hindered by sodium metal as sodium is more reactive which gets vaporised at 850 oC hence the process been maintained at lower temperature for safe operation.

The answer is Option (C) sodium is more reactive than potassium at 850 oC

​Regards.
 

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