Stainless steel is an alloy of which of the following metals?
- A$Fe$ only
- B$Fe$,$Cr$,and $Ni$
- C$W$ and $Cr$
- D$Ni$ and $Be$
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List-$I$ (Transition metal/Compound/complex) List-$II$ (Catalytic Role) $A$. $V_2O_5$ $I$. Preparation of ammonia from $N_2/H_2$ mixture $B$. $Fe$ $II$. Polymerisation of alkynes $C$. $PdCl_2$ $III$. Preparation of $H_2SO_4$ from $SO_2$ $D$. $Ni$ complex $IV$. Oxidation of ethyne to ethanal
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| $A$. $V_2O_5$ | $I$. Preparation of ammonia from $N_2/H_2$ mixture |
| $B$. $Fe$ | $II$. Polymerisation of alkynes |
| $C$. $PdCl_2$ | $III$. Preparation of $H_2SO_4$ from $SO_2$ |
| $D$. $Ni$ complex | $IV$. Oxidation of ethyne to ethanal |
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