info@clay6.com
+91-9566306857
logo

Ask Questions, Get Answers

X
 

Silver containing lead as an impurity is removed by

$ (a)\;\text{Poling} \\(b)\;\text{Cupellation } \\(c)\;\text{Lavigation} \\ (d)\;\text{Distillation} $

1 Answer

In Cupellation method the impure metal is heated in a blast of air when impurities are oxidised and blown away. For example, when impure silver is heated in air, lead present in it is oxidised to litharge (PbO) and blown away leaving a shining of silver.
Hence Silver containing lead as an impurity is removed by Cupellation.
Hence b is the correct answer.
answered Mar 18, 2014 by meena.p
edited Mar 6 by sharmaaparna1
 

Related questions

...