1.

What is the action of heat on the following : (i) KClO_(3), (ii) KClO_(4), (iii) KNO_(3) (iv) KMnO_(4), (v) K_(2)Cr_(2)0_(2)?

Answer»

Solution :(i) `2KClO_(3) underset(MnO_(4))overset("heat" (420K))to2KCl + 3O_(2)`
(In theabsenceof `MnO_(2)` , THEDECOMPOSITIONOF `KClO_(3)` takesplace at 670- 720 K)
(ii) `2KClO_(4) overset("heat")to 2KCl + 4O_(2)`
(iii) `2KNO_(3) overset("heat")to 2KNO_(2) + O_(2)`
(iv) `2KMnO_(4)overset("heat")to K_(2)MnO_(4) + MnO_(2) + O_(2)`
(v)Potassium DICHROMATE, `K_(2)Cr_(2)O_(7)` on heatingliberates dioxygen.
`2K_(2)Cr_(2)O_(7)overset("heat")to 2K_(2)O + 2Cr_(2)O_(3) + 3O_(2)`


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