1.

The rate constant of the reaction `A rarr B` is `0.6 xx 10^(-3)` mole per second. If the concentration of `A` is `5 M`, then concentration of `B` after `20` minutes is:A. 0.36 MB. 0.72 MC. 1.08 MD. 3.60 M

Answer» Correct Answer - B
Zero order reaction
x=kt
`x=0.6xx10^(-3)xx20xx60`
`=72xx10^(-2)`
x=0.72M
`{:(,Ato,B),("Initial case",5,0),("After 20 min.",5-x,x):}`
So, [B]=x=0.72M


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