
- ✓

- B

- C

- D








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In the above first order reaction the concentration of $\mathrm{PCl}_{5}$ reduces from initial concentration $50\, mol\,\mathrm{L}^{-1}$ to $10\, \mathrm{~mol} \,\mathrm{~L}^{-1}$ in $120\, minutes$ at $300\, \mathrm{~K}$. The rate constant for the reaction at $300\, \mathrm{~K}$ is $\mathrm{X}$ $\times 10^{-2} \mathrm{~min}^{-1}$. The value of $x$ is $......$
$[$ Given $\log 5=0.6989]$
$A _{( g )} \rightarrow 2 B _{( g )}+ C _{( g )}$
$P _{0}$ be initial pressure of $A$ and $P _{ t }$ the total pressure at time $'t'$. Integrated rate equation is :
$E_{F{e^{2 + }}/Fe}^o\, = \, - \,0.44\,\,V\,;\,\,E_{Z{n^{2 + }}/Zn}^o\, = \, - \,0.76\,\,V\,;\,$
$E_{C{u^{ + 2}}/Cu}^o\, = \,0.34\,\,V$
Based on this data, which of the following is the strongest reducing agent ?