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  • Choose the correct expression regarding average rate of  <img alt="\mathrm{reaction _ {avg}.}" src="https://entrancecorner.oncodecogs.com/gif.latex?%5Cmathrm%7Breaction%20_%20%7Bavg%7D.%7

Choose the correct expression regarding average rate of  \mathrm{reaction _ {avg}.}  and instantaneous rate of  \mathrm{reaction _ {rinst}.:}

 

Option: 1

\mathrm{r_{\text {inst. }}=\lim _{\Delta t \rightarrow 0}\left(r_{\text {avg. }}\right)\\ }


Option: 2

\mathrm{r_{\text {avg. }}=\lim _{\Delta t \rightarrow 0}\left(r_{\text {inst. }}\right)\\ }


Option: 3

\mathrm{r_{\text {avg. }}=\lim _{\Delta C \rightarrow 0}\left(r_{\text {inst. }}\right) }


Option: 4

\mathrm{r_{\text {inst. }}=\lim _{\Delta C \rightarrow 0}\left(r_{\text {avg. }}\right)}


Answers (1)

best_answer

Average rate of reaction:
For a reaction,
\mathrm{A \rightarrow B }

\mathrm{\text { Average rate }=\frac{\text { Total change in concentration }}{\text { Total time taken }} }
Average rate \mathrm{=\frac{\Delta C}{\Delta t} }
Instantaneous rate of a reaction:
Rate of reaction at a particular instant is called Instantaneous rate of a reaction.
For a reaction
\mathrm{ A \rightarrow B }

\mathrm{ r_{\text {inst. }}=\frac{d C}{d t} \\ }
\mathrm{ r_{\text {inst. }}=\lim _{\Delta t \rightarrow 0}\left(\frac{\Delta C}{\Delta t}\right)=\frac{d C}{d t} }
So,
\mathrm{ r_{\text {inst. }}=\lim _{\Delta t \rightarrow 0}\left(r_{\text {avg. }}\right) }
 

Posted by

himanshu.meshram

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