CUET and UG exam WB JEE Mock Test Series 2025 Chemistry General Principles And Process of Isolation of Elements Thermodynamic and Electrochemical Principles of Metallurgy
In which of the following pair (s), the minerals are converted into metals by self reduction process
1
\( Cu_{2}S, PbS \)
2
\( PbS ,HgS \)
3
\( PbS,ZnS \)
4
\( Ag_{2}S,Cu_{2}S \)