How many of the following reduction processes are correct :
(1) B 2 O 3 + Al 
B.
(2) Cr 2 O 3 + 2Al 
Cr.
(3) TiCl 4 + Mg 
Ti.
(4) PbS + PbO 
Pb.
(5) 3Fe 2 O 3 + CO ⎯→ 2Fe 3 O 4 + CO 2
(6) Fe 3 O 4 + CO ⎯→ 3FeO + CO 2
(7) 2Cu 2 O + Cu 2 S ⎯→ 6Cu + SO 2
(8) SnO 2 + C ⎯→ SnO + CO
Text Solution
Verified by Experts1
7 (except 8)
Sol. (1) B 2 O 3 + 2Al 
2B + Al 2 O 3 (aluminothermic process-extraction of boron)
(2) Cr 2 O 3 + Al 
2Cr + Al 2 O 3 (extraction of chromium)
(3) TiCl 4 + 2Mg 
Ti + 2MgCl 2 (Kroll process-extraction of titanium)
(4) PbS + 2PbO 
3Pb + SO 2 (extraction of lead)
(5) 3Fe 2 O 3 + CO ⎯→ 2Fe 3 O 4 + CO 2 (Indirect reduction)
(6) Fe 3 O 4 + CO ⎯→ 3FeO + CO 2 (Indirect reduction)
(7) 2Cu 2 O + Cu 2 S ⎯→ 6Cu + SO 2 (Self reduction)
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems