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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(Given: Atomic no. $Eu, 63; Sm , 62 ; Tm , 69 ; Tb$, $65 ; Yb , 70 ; Dy , 66]$

$N{O_2} + {F_2}\xrightarrow{{slow}}N{O_2}F + F$
$N{O_2} + F\xrightarrow{{fast}}N{O_2}F$
Thus rate expression of the above reaction can be written as