Given two examples of slow speed reactions.

Explanation

(1) On heating potassium chlorate `(KClO_(3))` it decomposes slowly into potassium chloride and oxygen gas .
`underset("Potassium chlorate")(2KClO_(3))rarr2KCl+underset("Oxygen")(3O_(2))uarr`
This reaction requires long time for completion, therefore it is slow speed reaction.
(2) Rusting of iron is slow speed reaction. In this reaction iron reacts with oxygen from air to form iron oxide.
`underset("Iron")(4Fe_((s)))+3O_(2_((g)))rarrunderset("Oxygen")2Fe_(2)O_(3_((s)))`
This reaction requires long time for completion.