Consider the following reaction:
`2NO_(2)(g) rarr 2NO(g)+ O_(2)(g)`
In the figure below, identify the curves `X,Y,` and `Z` associated with the three species in the reaction

Options

A. `X=NO,Y=O_(2),Z=NO_(2)`
B. `X=O_(2),Y=NO,Z=NO_(2)`
C. `X=NO_(2),Y=NO,Z=O_(2)`
D. `X=O_(2),Y=NO_(2),Z=NO`

Answer

A

Explanation

`r=-(1)/(2)(d[NO_(2)])/(dt)=+(1)/(2)(d[NO])/(dt)=+(d[O_(2)])/(dt)`
:. `NO_(2)` is reactant so (Z)
rate of disappearance of `NO_(2)` = rate of formation of NO.So No is (X)