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Chemical Kinetics — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryChemical Kinetics2 Marks
Question
Give examples of first order reaction.
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Answer

$\rightarrow $ Hydrogenation of ethene is an example of first order reaction.
$ C _2 H _4(g)+ H _2(g) \rightarrow C _2 H _6(g)$
$\text { Rate }= k \left[ C _2 H _4\right]$
All natural and artificial radioactive decay of unstable nuclei take place by first order kinetics. ${ }_{88}^{226} Ra \rightarrow{ }_2^4 He \ +\ { }_{86}^{222} Rn$
$\text { Rate }= k [ Ra ]$
Decomposition of $N _2 O _5$ and $N _2 O$ are some more examples of first order reactions.

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