Which of method is used for purification of $Ni$
Monds process
Van-Arkel process
Zone refining
None of these
The metal which mainly occurs as oxide ore in nature is
A sulphide ore first converted into its oxide before reduction. This is done because
Which of the following elements is present as the impurity to the maximum extent in the pig iron?
Refining of silver is done by :
Self reduction process is used in the extraction of –
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