Catalyst or promoter used in an industrial process (Haber's process, hydrogenation of oil)

1. A.
   catalyst
2. B.
   inhibitor
3. C.
   promotor
4. D.
   adsorbate

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1. A.
   $\mathrm{NO_{(g)}}$
2. B.
   $\mathrm{Fe_{(s)}}$
3. C.
   $\mathrm{Ni_{(s)}}$
4. D.
   $\mathrm{K_2O, Al_2O_{3(s)}}$

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1. A.
   Ni
2. B.
   Pt
3. C.
   Fe
4. D.
   $\mathrm{V_2O_5}$

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1. A.
   Fe-Cr
2. B.
   Mo/Fe
3. C.
   $\mathrm{MnO_2}$
4. D.
   Pt

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