question_answer

The plot shows the variation of .ln Kp versus temperature for the two reactions.

\[M(s)+\frac{1}{2}{{O}_{2}}(g)\xrightarrow[{}]{{}}MO(s)\]and

\[C(s)+\frac{1}{2}{{O}_{2}}(g)\xrightarrow[{}]{{}}CO(s)\]

 Identify the correct statement:   JEE Main Online Paper (Held On 09 April 2016)

A) At T > 1200 K, carbon will reduce MO(s) to M(s).

B) At T < 1200 K, oxidation of carbon is unfavourable.

C) Oxidation of carbon is favourable at all temperatures.

D) At \[T<1200K,\] the reaction \[MO(s)+C(s)\to M(s)+CO(g)\]is spontaneous.

Correct Answer: D

Solution :

According to Ellingham diagram, as given At \[T<1200,\]carbon will reduce MO(s) to M(s) hence, chemical reaction\[{{C}_{(s)}}+M{{O}_{(s)}}\xrightarrow[{}]{{}}{{M}_{(s)}}+C{{O}_{(g)}}\] is spontaneous.