A colourless liquid ‘A’ contains H and O elements only. It decomposes slowly on exposure to light. It is stabilised by mixing urea to store in the presence of light.

(i) Suggest possible structure of A.


(ii) Write chemical equations for its decomposition reaction in light.


‘A’ is Hydrogen peroxide i.e. H2O2.


Hydrogen peroxide contains H and O elements only. It decomposes slowly on exposure of light whose equation is as follows- 2H2O2 (l)→ 2H2O (l) + O2 (g)


And that’s why it is stored in wax-lined glass or plastic vessels in dark or urea can be added as a stabilizer.


(i) Possible structure of hydrogen peroxide is


h2o2.png


(ii) Chemical equations for its decomposition reaction in light is as follows-


2H2O2 (l)→ 2H2O (l) + O2 (g)


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