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Which of the following is incorrect on the basis of the above

Question

Which of the following is incorrect on the basis of the above Ellingham diagram for carbon?

A

Upto 710

^{\circ}

C, the reaction of forrnation of

C O_{2}

is energetically more favorable, but above 710

^{\circ}

C, the formation of CO is preferred.

B

In principle, carbon can be used to reduce any metal oxide at a sufficiently high temperature.

C

Δ S (C_{(s)} + 1/2 O_{2 (g)} ⟶ C O_{(g)}) < Δ S (C_{(S)} + O_{2 (g)} ⟶ C O_{2 (g)}

D

Carbon reduces many oxides at elevated temperature because

Δ G

vs temperature line has a negative slope.

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Which of the following is incorrect on the basis of the above Ellingham diagram for carbon?

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Text solutionVerified

In Ellingham diagram,

higher is the slope higher is the entropy change so

Δ S (C_{(s)} + 1/2 O_{2 (g)} ⟶ C O_{(g)}) > Δ S (C_{(S)} + O_{2 (g)} ⟶ C O_{2 (g)}

as CO have higher slope.

Also,

Carbon monoxide is a more effective reducing agent than carbon below 983 K but above this temperature the reverse is true.

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Question Text	Which of the following is incorrect on the basis of the above Ellingham diagram for carbon?
Answer Type	Text solution:1
Upvotes	150