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Acetylene is oxidised by permanganate in acidic solutions to liberate carbondioxide.

Answer» <html><body><p></p>Solution :a) The <a href="https://interviewquestions.tuteehub.com/tag/ionic-1051191" style="font-weight:bold;" target="_blank" title="Click to know more about IONIC">IONIC</a> skeleton equation is written as <br/> `C_(2)H_(2)+MnO_(4)^(-)overset(H^(+))rarrCO_(2)+Mn^(2+)` <br/> b) Writing oxidation numbers <br/> `overset(-1)(C_(2))overset(+1)(H_(2))+overset(+7)(Mn)overset(-2)(O_(4)^(-))rarroverset(+4)(C)overset(-2)(O_(2))+overset(+2)(Mn^(+2))` <br/> c) Locating atoms undergoing change in oxidation numbers <br/> `overset(-1)(C_(2))H_(2)+overset(+7)(Mn)O_(4)^(-)rarroverset(+4)CO_(2)+overset(+2)(Mn^(+2))` <br/> d) Dividing the reaction into two two halves and balancing in acidic medium, separately <br/> Oxidation half - reaction : `C_(2)H_(2)rarrCO_(2)` <br/> Step : 1 Balance carbon atoms <br/> `_(2)H_(2)rarr2CO_(2)` <br/> Step 2 : Balance oxygen atoms <br/> `C_(2)H_(2)+4H_(2)Orarr2CO_(2)` <br/> Step 3 : Balance hydrogen atoms <br/> `C_(2)H_(2)+4H_(2)Krarr2CO_(2)+10H^(+)` <br/> Step 4 : Balance charge <br/> `C_(2)H_(2)+4H_(2)Orarr2CO_(2)+10H^(+)+10e^(-)".....(a)"` <br/> Reduction half - reaction : `MnO_(4)^(-)rarMn^(2+)` <br/> Step 1 : Balance oxygen atoms <br/> `MnO_(4)^(-)rarrMn^(2+)+4H_(2)O` <br/> Step 2 : Balance hydrogen atoms <br/> `MnO_(4^(-)+8H^(+)rarrMn^(2+)+4H_(2)O` <br/> Step3 : Balance charge <br/> `MnO_(4)^(-)+8H^(+)+5e^(-)rarr Mn^(2+)+4H_(2)O"...(b)"` <br/> e) Equalising the <a href="https://interviewquestions.tuteehub.com/tag/electron-968715" style="font-weight:bold;" target="_blank" title="Click to know more about ELECTRON">ELECTRON</a> and <a href="https://interviewquestions.tuteehub.com/tag/adding-2399902" style="font-weight:bold;" target="_blank" title="Click to know more about ADDING">ADDING</a> the two halves <br/> `"eq(a) "xx1+"eq(b)"xx"2, we get"`<br/> `{:(C_(2)H_(2)+4H_(2)Orarr2CO_(2)+10H^(+)+10e^(-)),(2MnO_(4)^(-)+16H^(+)+10e^(-)rarr2Mn^(2+)+8H_(2)O),(bar(C_(2)H_(2)+2MnO_(4)^(-)+6H^(+)rarr"")),(""2CO_(2)+2Mn^(2+)+4H_(2)O):}` <br/> This is <a href="https://interviewquestions.tuteehub.com/tag/balanced-389334" style="font-weight:bold;" target="_blank" title="Click to know more about BALANCED">BALANCED</a> equation.</body></html>


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