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General Principles and processes of Isolation of Elements
medium
Which of the following set of elements mostly occur as sulphide ores ?
A
$Zn,\,Cu,\, Na$
B
$Zn,\,Cu,\,Pb$
C
$Fe,\,Al$
D
$Cu,\, Ag,\, Au$
Solution
$Zn , Cu , Pb$ mostly occur as sulphide ores. For example, $Zn$ mostly occurs as zine blende $ZnS. Cu$ mostly occurs as $Cu _2 S$ and $CuFeS _2 . Pb$ mostly occurs as galena $PbS$
Standard 12
Chemistry
