Select the correct statements (Ellingham diagram):

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

When temperature is raised, a point will be reached where the graph crosses the ΔfGΘ=0 line. Below this temperature, the free energy of formation of the oxide is negative, so the oxide is stable

When the temperature is raised, a point will be reached where the graph crosses the ΔfGΘ=0 Hence Above this temperature, the free energy of formation of the oxide is positive, and the oxide becomes unstable, and should decompose into the metal and dioxygen

Theoretically, all oxides can be decomposed to give the metal and dioxygen if a sufficiently high temperature can be attained

Theoretically, all oxides cannot be decomposed to give the metal and dioxygen if a sufficiently high temperature can be attained

answer is A.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

Any metal will reduce the oxide of other metals which lie above it in the Ellingham diagram because the free energy will become more negative by an amount equal to the difference between the two graphs at that particular temperature.Ex: Al metal can reduce the oxide of metal placed above it. Due to more negative free energy, Al can reduce Zn but not Mg below 1350oC. However, above 1350oC, Al can reduce Mg.

Watch 3-min video & get full concept clarity