MCQ
The catalyst used in contact process is
- A$Fe_2O_3$
- ✓$V_2O_5$
- C$SO_3$
- D$Ag_2O$
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$A\,\xrightarrow{{H{g^{2 + }}\,/\,{H^ + }}}B\,\xrightarrow{{NaB{H_4}}}C\,\xrightarrow[{conc.\,\,HCl}]{{ZnC{l_2}}}$ Turbidity within $5$ minutes.
Consider the following reactions $‘A’$ is