NCERT Class XII Chemistry
Chapter - General Principle of Process of Isolation of Elements
Questions with Solutions
© examsnet.com
Question : 19
Total: 31
How is leaching carried out in case of low grade copper ores?
Solution:
The leaching of the low grade copper ores is carried out withacids in the presence of air when copper goes into solution as Cu2 +
Therefore,
2 C u ( s ) + 2 H 2 S O 4 ( a q ) + O 2 ( q ) – – – – – – – ▶ 2 C u S O 4 ( a q ) + 2 H 2 O ( l )
Therefore,
or C u ( s ) + 2 H ( a q ) + + 1 ∕ 2 O 2 ( g ) – – – – – – – ▶ C u ( a q ) 2 + + H 2 O ( l )
© examsnet.com
Go to Question: