MCQ
Ethanol reacts with $H_2SO_4$ at $140^o$ to form
- AEthene
- BEthyl hydrogen sulphate
- ✓Ethoxy ethane
- DNone of these

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$(A)$ Internal energy $(B)$ Irreversible expansion work
$(C)$ Reversible expansion work $(D)$ Molar enthalpy

$Fe^{3+} + e \to Fe^{2+}\, ;\, E^o = 0.771\,volt$
$I_2 + 2e \to 2I^-\, ;\, E^o = 0.536\,volt$
$E^o$ cell for the cell reaction
$2Fe^{3+} + 2I^-\to 2Fe^{2+}+ I_2$ is