Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
Auto reduction process is used for the extraction of (1)\[Cu\] (2)\[Hg\] (3)\[Pb\] (4)\[Al\]A) 1, 2 and 3 are correct
B) 1 and 2 are correct
C) 2 and 4 are correct
D) 1 and 3 are correct
Correct Answer: A
Solution :
Auto reduction process is used for the extraction of Cu, Hg and Pb. \[2C{{u}_{2}}O+C{{u}_{2}}S\xrightarrow[{}]{\Delta }6Cu+S{{O}_{2}}\] \[2HgO+HgS\xrightarrow{\Delta }3Hg+S{{O}_{2}}\] \[2PbO+Pbs\xrightarrow{\Delta }3Pb+S{{O}_{2}}\]
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