A) \[{{\text{V}}_{\text{2}}}{{\text{O}}_{\text{5}}}\]
B) \[F{{e}_{2}}{{O}_{3}}\]
C) \[C{{r}_{2}}{{O}_{3}}\]
D) \[Cr{{O}_{3}}\]
Correct Answer: A
Solution :
Even at \[400-500{{\,}^{o}}C\]the rate of reaction is very low. Therefore, to increase the reaction velocity a suitable catalyst is used. Now a days most of the sulphuric acid plants use \[{{\text{V}}_{\text{2}}}{{\text{O}}_{\text{5}}}\]as a catalyst.
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