Equivalent conductance of O .0128 N acetic acid solution, at 25°C is 14 ohm^-1 eq^-1 and at infinite dilution is 391 ohm-1eq^-1 .The degree of dissociation of acetic acid in the solution and its dissociation constant, respectively are:

• 0.036 and 1.66x10^-5

• 0.121 and 1.78x10^-4

• 0 .213 and 1.84x10^-5

• O .054 and 1.94x10^-4

Two metals 'A' and 'B' have E${}_{\mathrm{red}}^{°}$, value equal to 0.36 V and 1.23 V. What will be the correct cell equation?

• A + B²⁺ $\to$ A²⁺ + B

• A²⁺ + B $\to$ A + B²⁺

• Both (a) and (b)

• None of the above

Ag | AgCl | Cl^- (C₂) || Cl^- (C₁) | AgCl | Ag for this cell $∆$G is negative if:

• C₁ = C₂

• C₁ > C₂

• C₂ > C₁

• both (a) and (b)

Rusting of iron is a chemical reaction. The reaction is :

• double decomposition

• combination

• displacement

• analysis

315.

Which one of the following conditions will increase the voltage of the cell represents by the equation?

Cu (s) + 2Ag⁺ (aq) $\to$ Cu²⁺ (aq) + Ag (s)

• Increase in the concentration of Ag⁺ ions

• Increase in the concentration of Cu²⁺ ions

• Increase in the dimensions of silver electrode

• Increase in the dimensions of copper electrode

During the electrolysis of the aqueous solution of copper sulphate using Pt electrodes , the reaction taking place at the anode is:

• Cu²⁺ + 2e^- $\to$ Cu

• Cu $\to$ Cu²⁺ + 2e^-

• 2H₂O $\to$ 4H⁺ + O₂ + 4e^-

• H₂O + e^- $\to$ OH^- + $\frac{1}{2}$H₂

Cadmium rods are used for which purpose?

• emit electrons

• absorb neutrons

• emit neutrons

• absorb electrons

What is the effect of dilution on the equivalent conductance of strong electrolyte?

• Decrease on dilution

• Remains unchanged

• Increase on dilution

• None of the above

How many moles of Pt may be deposited on the cathode when 0.80 F of electricity is passed through a 1.0 M solution of Pt⁴⁺ ?

• 1.0 mol

• 0.20 mol

• 0.40 mol

• 0.80 mol

Calculate ${\wedge }_{\mathrm{HOAc}}^{\infty }$ (in S cm² mol^-1) using appropriate molar conductances of the electrolytes listed in the given table

Electrolyte	KCl	KNO3	HCl	NaOAc	NaCl
${\wedge }^{\infty }$ (S cm2 mol-1)	149.9	145.0	426.2	91.0	126.5

at infinite dilution in H₂O at 25$°$C

• 517.2

• 305.0

• 390.7

• 217.5