Rohan heard that instructions wee given to the laboratory attendant to store a particular chemical i.e, keep it in the dark room, add some urea in it, and keep it away from dust. This chemical acts as an oxidising as well as reducing agent in both acidic and alkaline media. This chemical is important for use in the pollution control treatment of domestic and indusrtial effluents. (i) Write the name of this compound. (ii) Explain why such precautions are taken for storing this chemical.

Rohan heard that instructions wee given to the laboratory attendant to

1.	Rohan heard that instructions wee given to the laboratory attendant to store a particular chemical i.e, keep it in the dark room, add some urea in it, and keep it away from dust. This chemical acts as an oxidising as well as reducing agent in both acidic and alkaline media. This chemical is important for use in the pollution control treatment of domestic and indusrtial effluents. (i) Write the name of this compound. (ii) Explain why such precautions are taken for storing this chemical.
Answer» (a) The name of the compound is `H_(2)O_(2)` . It acts as an oxidising as well as reducing agent in both acidic basic medium. (b) `H_(2)O_(2)` is decomposed by light and dust particles . Urea is added as a negative catalyst , i.e., to check its decomposition `2H_(2)O_(2)(aq) overset(hv)to 2H_(2)O (l) + O_(2)(g)` Because of the oxidising properties, `H_(2)O_(2)` is widely used to control pollution by oxidation of harmful cyanides and obnoxious smelling sulphides present in domestic adn industrial effluents . It also helps in sewage disposal by supplying `O_(2)` for oxidation of organic matter present in sewage waters.

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