The catalyst ' \( Y \) ' is : (A) \( \mathrm{V}_{2} \mathrm{O}_{5} \) (B) \( \mathrm{Ni} \) (C) ...

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The catalyst ' \( Y \) ' is :
(A) \( \mathrm{V}_{2} \mathrm{O}_{5} \)
(B) \( \mathrm{Ni} \)
(C) \( \mathrm{Fe} \)
(D) \( \mathrm{Cr}_{2} \mathrm{O}_{3}+\mathrm{Fe}_{2} \mathrm{O}_{3} \)
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