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Explain properties of carbon monoxide and give its uses |
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Answer» Solution :Properties : (i) Carbon monoxide is a colourless, odourless and almost water insoluble gas. (ii) The highly poisonous nature of CO arises because of its ability to form a complex with hemoglobin which is about 300 times more stable than the oxygen hemoglobin complex This PREVENTS hemoglobin in the red BLOOD corpuscles from carrying oxygen round the body and ultimately resulting in death. (iii) On combustion it GIVES light blue colored flame. `CO+1/2O_(2) to CO_2`+ Energy (iv) Reduction character : It reacts with many METAL oxides and reduces to corresponding metals. `ZnO_((s)) + CO_((g)) to Zn_((s)) + CO_(2(g))` `CuO + CO to Cu+CO_(2)` `Fe_2O_(3(s)) + 3CO_((g)) to 2Fe_((s)) + 3CO_(2(g))` (v) Formation of metal carbonyl character: CO combines as ligand with many transitional metals, such as Ni, Fe, Co etc. and forms metal carbonyl complex compounds. `Ni+4CO overset"333K - 343 K"to underset"Nickel tetracarbonyl"([Ni(CO)_4])` `Fe+ 5CO oversetDeltato [Fe(CO)_5]`Iron pentacarbonyl Uses : (i) CO is useful for extraction of some metals from their oxide. e.g., used in blast furnace. `Fe_2O_3 + 3CO to 2Fe+ 3CO_2` (ii) CO is used to prepare tetracarbonyl nickel in Mond.s carbonyl process to obtain pure nickel metal from impure nickel metal. `Ni_((s)) + 4CO_((g)) oversetDeltato [Ni(CO)_4]_((g))` (iii) In industrial field CO is used as a FUEL in the form of water gas and producer gas. (iv) It is used in manufacturing of methyl alcohol and formic acid. (v) It is used in manufacturing of magnetic tapes (Iron carbonyl) for tape recorder. |
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