Question

Select the incorrect statement:

• A. In the decomposition of a metal oxide into oxygen and solid metal, entropy increases
• B. Decomposition of an oxide is an endothermic change
• C.
  $\Delta G°vsT$ graph for the formation of $C{O}_2$ has negative slope
• D. $\Delta G°vsT$ graph for the formation of $CO$ has negative slope.

Answer 1

The correct option is C

$\Delta G°vsT$ graph for the formation of $C{O}_2$ has negative slope
From the Ellingham diagram it is observed that $\Delta G°vsT$graph for formation of $C{O}_2$ has zero slope.