The free energy formation ( ΔfGo ) of CO from C becomes lower at temperatures above 1120K whereas that of CO2 from C becomes lower above 1323K than ΔfG0 of ZnO. However, Δ fG0 of CO2 from CO is always higher than that of ZnO. Therefore, C can reduce ZnO to Zn but not CO. therefore, out of C and CO, C is a better reducing agent than CO for ZnO.

Q. 223.6( 11 Votes )

Out of C and CO,

Class 12th NCERT - Chemistry Part-I 6. General Principles and Processes of Isolation of Elements

Answer :

The free energy formation ( Δ_fG^o ) of CO from C becomes lower at temperatures above 1120K whereas that of CO₂ from C becomes lower above 1323K than Δ_fG⁰ of ZnO. However, Δ _fG⁰ of CO₂ from CO is always higher than that of ZnO. Therefore, C can reduce ZnO to Zn but not CO. therefore, out of C and CO, C is a better reducing agent than CO for ZnO.

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