CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

How many of the following metals is extracted by self reduction process?
Pb, Au, Mg, Sn, Fe, Al, Ag, Hg, Na, Zn, Cu, Ca

A
3.00
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
3
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
3.0
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The reduction in absence of reducing agent is known as self-reduction. Metals that are less electropositive can be obtained by self reduction process. These metals are mercury, copper, and lead.
Copper sulphide reacts with copper oxide to give copper, so here copper metal itself work as reducing agent.
2Cu2S+3O22Cu2O+2SO2
2Cu2O+Cu2S6Cu+SO2
Similarly,
2HgS+3O22HgO+2SO2
2HgO+HgS3Hg+SO2
and
2PbS+3O22PbO+2SO2
2PbO+PbS3Pb+SO2

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Heat and Thermodynamics in Metal Extraction
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon