Question
Explain why low molecular mass alcohols are soluble in water.
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(i) What are anti-freezing agents?
(ii) What is called de-icing agent?
(ii) What is called de-icing agent?
(a) Calculate $\Delta G^{0}$ for the reaction
$Zn(s) + Cu^{2+}(aq) \longrightarrow Zn^{2+}(aq) + Cu(s)$.
Given: $E^{0}$ for $Zn^{2+}/Zn = -0.76 V$ and
$E^{0}$ for $Cu^{2+}/Cu = +0.34 V$,
$R = 8.314 J K^{-1} mol^{-1}$,
$F = 96500 C mol^{-1}$.
(b) Give two advantages of fuel cells.
→$Zn(s) + Cu^{2+}(aq) \longrightarrow Zn^{2+}(aq) + Cu(s)$.
Given: $E^{0}$ for $Zn^{2+}/Zn = -0.76 V$ and
$E^{0}$ for $Cu^{2+}/Cu = +0.34 V$,
$R = 8.314 J K^{-1} mol^{-1}$,
$F = 96500 C mol^{-1}$.
(b) Give two advantages of fuel cells.
Compound ‘A’ was prepared by oxidation of compound ‘B’ with alkaline KMnO4. Compound ‘A’ on reduction with lithium aluminium hydride gets converted back to compound ‘B’. When compound ‘A’ is heated with compound B in the presence of H2SO4 it produces fruity smell of compound C to which family the compounds ‘A’, ‘B’ and ‘C’ belong to?
Write the Nernst equation for the cell reaction in the Daniel cell. How will the ECell be affected when concentration of Zn2+ ions is increased?