Multiple Choice QuestionsThe Gibbs energy for the decomposition of Al2O3 at 500°C is as follows
The potential difference needed for electrolytic reduction of Al2O3 at 500°C is at least
4.5 V
3.0 V
2.5 V
2.5 V
Given: 
The value of standard electrode potential for the change 
will be
-0.072
0.385 V
0.770 V
0.770 V
On the basis of the following thermochemical data: (∆f G° H(aq)+=0)
H2O(l) → H+(aq) + OH–(aq); ∆H =57.32kJ
H2(g) + 1/2O2(g) → H2O(l); ∆H = –286.20 kJ
The value of enthalpy of formation of OH–ion at 25°C is
–22.88 kJ
–228.88 kJ
+228.88 kJ
+228.88 kJ
The cell, Zn|Zn2+ (1M)|| Cu2+ (1M|Cu(Eocell = 1.10 V), was allowed to be completely discharged at 298 K. THe relative concentration of Zn2+ to Cu2+ 
antilog (24.08)
37.3
1037.3
1037.3
In a saturated solution of the sparingly soluble strong electrolyte AgIO3 (molecular mass = 283) the equilibrium which sets in is
If the solubility product constant Ksp of AgIO3 at a given temperature is 1.0 × 10-8, what is the mass of AgIO3 contained in 100 ml of its saturated solution
28.3 × 10–2 g
2.83 × 10–3 g
1.0 × 10–7 g
1.0 × 10–7 g
The equivalent conductances of two strong electrolytes at infinite dilution in H2O (where ions move freely through a solution) at 25°C are given below:
What additional information/quantity one needs to calculate Λ of an aqueous solution of acetic acid?
∧° of NaCl
Λº of CH3COOH
The limiting equivalent conductance of 
The limiting equivalent conductance of
The first and second dissociation constants of an acid H2A are 1.0 × 10–5 & 5.0 × 10–10 respectively. The overall dissociation constant of the acid will be
5.0 × 10–5
5.0 × 1015
5.0 × 10–15
5.0 × 10–15
The molar conductivities ∧oNaOAc and ∧o HCl at infinite dilution in water at 25o C are 91.0 and 426.2 S cm2 /mol respectively. To calculate ∧o HOAc, the additional value required is
∧oH2O
∧oKCl
∧oNaOH
∧oNaOH
