MCQ
$Y$ is


- A

- ✓

- C

- D







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Product $(A)$ is
$CO(g) + \frac{1}{2}{O_2}(g)\, \to \,C{O_2};\,\,\,\Delta H = 135.2\,kcal$
Then heat of formation of $CO(g)$ is .....$ kcal$