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 25^o C are 91.0 and 426.2 S cm² /mol respectively. To calculate ∧^o HOAc, the additional value required is

• ∧^oH₂O

• ∧^oKCl

• ∧^oNaOH

• ∧^oNaOH

Given the data at 25^oC,
Ag + I^- → Agl +e^-; Eo = 0.152 V
Ag → Ag⁺ + e^- ;Eo = -0.800 V
What is the value of log K_sp for Agl?
(2.303RT/F = 0.059 V)

• –8.12

• +8.612

• –37.83

• –37.83

Resistance of a conductivity cell filled with a solution of an electrolyte of concentration 0.1 M is 100 Ω. The conductivity of this solution is 1.29 Sm^–1. Resistance of the same cell when filled with 0.2 M of the same solution is 520 Ω.The molar conductivity of 0.02 M solution of the electrolyte will be

• 124 × 10^–4 Sm² mol^–1

• 1240 × 10^–4 Sm² mol^–1

• 1.24 × 10^–4 Sm² mol^–1

• 1.24 × 10^–4 Sm² mol^–1

The ionic mobility of alkali metal ions in aqueous solution is maximum for

• K⁺

• Rb⁺

• Li⁺

• Li⁺

358.

If α is the degree of dissociation of Na₂SO₄, the vant Hoff’s factor (i) used for calculating the molecular mass is

• 1 + α

• 1 - α

• 1 +2α

• 1 +2α

The highest electrical conductivity of the following aqueous solutions is of

• 0.1 M acetic acid

• 0.1 M chloroacetic acid

• 0.1 M fluoroacetic acid

• 0.1 M fluoroacetic acid

Aluminium oxide may be electrolysed at 1000^o  C to furnish aluminium metal (Atomic mass = 27 amu; 1 Faraday = 96,500 Coulombs). The cathode reaction is

Al³⁺ +3e^- → Al^o
To prepare 5.12 kg of aluminium metal by this method would require

• 5.49 x 10⁷ C of electricity

• 1.83 x 10⁷ C of electricity

• 1.49x 10⁷ C of electricity

• 1.49x 10⁷ C of electricity