STD 11 - 4. Chemical bonding and molecular structure — NEET STD 11 Science — Question

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 . . . . . . 

Given                                                                                                   $\Delta H$

$(i)\, Fe_2O_{3(s)}+3C_{(graphite)} \to 2Fe_{(s)} + 3CO_{(g)}$         $492\, kJ/mol$

$(ii)\, FeO_{(s)}+C_{(graphite)} \to Fe_{(s)} + CO_{(g)}$                     $156\, kJ/mol$

$(iii)\, C_{(graphite)} + O_{2(g)} \to CO_{2(g)}$                                   $-393 \,kJ/mol$

$(iv)\, CO_{(g)} + \frac{1}{2}\, O_{2(g)} \to CO_{2(g)}$                            $-283\, kJ/mol$