Q49 / 180 · KCET 2023 · Chemistry

For the formation of which compound in Ellingham diagram $\Delta G^{\circ}$ becomes more and more negative with increase in temperature?

  • Correct answer
    A
    $\mathrm{CO}$
  • B
    $\mathrm{FeO}$
  • C
    Zno
  • D
    $\mathrm{Cu}_2 \mathrm{O}$

Solution

For formation of carbon monoxide ( $\mathrm{CO}$ ), the Ellingham diagram shows that the $\Delta G^{\circ}$ becomes negative with an increase in temperature. It indicates that the formation of $\mathrm{CO}$ from carbon (C) and oxygen $\left(\mathrm{O}_2\right)$ becomes more favourable at higher temperatures.

Hence, the correct answer is option: 'A'.

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