1.

Which one of the following is a second order reaction?

Answer»

`H_(2) + Br_(2) rightarrow 2HBR`<BR>`NH_(4)NO_(3) rightarrow N_(2) + 3H_(2)O`
`H_(2) + CI_(2) overset"(sunlight)"to 2HCI`
`CH_(3)COOCH_(3) + NaOH rightarrow CH_(3)COONA+H_(2)O`

Solution :`H_(2) + Br_(2) rightarrow 2HBr`
`H_(2) _CI_(2) rightarrow 2HCI`
These are photochemical reactions, Order = zero.Decomposition of ammonium nitrate in a AQUEOUS solution is a first oreder reaction.
`NH_(4)NO_(3) rightarrow N_(2) + 3 H_(2)O`
Hydrolysis of ester by an alkali (saponification) is a second order reaction.
`CH_(3)COOCH_(3) + NaOH rightarrow CH_(3)COONa + CH_(3)OH`.


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