MCQ
An endothermic reaction is one in which
- AHeat is converted into electricity
- BHeat is absorbed
- CHeat is evolved
- DHeat is converted into mechanical work
While, any reaction involving overall heat releasing of heat is known as exothermic reaction.
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$E^o_{Cl_2/Cl^-} = 1.36\,V,$ $E^o_{Cr^{3+}/Cr}= -0.74\,V,$
$E^o_{Cr_2/O_7^{2-}/Cr^{3+}}=1.33\,V,$ $E^o_{MnO^-_4/Mn^{2+}} = 1.51\,V$
Among the following, the strongest reducing agent is