MCQ
Highest fluoride and highest oxide of $Mn$ are respectively
- A$MnF_7, Mn_2O_7$
- B$MnF_6, MnO_3$
- ✓$MnF_4, Mn_2O_7$
- D$MnF_7, MnO_2$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

$aCr _2 O _7^{2-}+ bSO _3^{2-}( aq )+ cH ^{+}( aq ) \rightarrow 2 aCr ^{3+}( aq )+ bSO _4^{2-}( aq )+\frac{ c }{2} H _2 O ( l )$
the coefficients a, b and $c$ are found to be, respectively-
Statement $I$ : The rate law for the reaction $A+B \rightarrow C$ is rate $(r)=k[A]^2[B]$. When the concentration of both $\mathrm{A}$ and $\mathrm{B}$ is doubled, the reaction rate is increased " $\mathrm{x}$ " times.
Statement $II$ :
(Image)
The figure is showing "the variation in concentration against time plot" for a $"y"$ order reaction. The value of $x+y$ is . . . . . . 