AIEEE 2006 | Electrochemistry Question 163 | Chemistry

Resistance of a conductivity cell filled with a solution of an electrolyte of concentration 0.1 M is 100$$\Omega $$. The conductivity of this solution is 1.29 S m^–1. Resistance of the same cell when filled with 0.2 M of the same solution is 520 $$\Omega $$, The molar conductivity of 0.02 M solution of the electrolyte will be

124 $$\times$$ 10^–4 S m² mol^–1

1240 $$\times$$ 10^–4 S m² mol^–1

1.24 $$\times$$ 10^–4 S m² mol^–1

12.4 $$\times$$ 10^–4 S m² mol^–1

AIEEE 2005

MCQ (Single Correct Answer)

-1

For a spontaneous reaction the ∆G , equilibrium constant (K) and $$E_{cell}^o$$ will be respectively

-ve, >1, +ve

+ve, >1, -ve

-ve, <1, -ve

-ve, >1, -ve

AIEEE 2005

MCQ (Single Correct Answer)

-1

Aluminium oxide may be electrolysed at 1000^oC to furnish aluminium metal (Atomic mass = 27 amu; 1 Faraday = 96,500 Coulombs). The cathode reaction is Al³⁺ + 3e^- $$\to$$ Al^o To prepare 5.12 kg of aluminium metal by this method would require

5.49 $$\times$$ 10⁷ C of electricity

1.83 $$\times$$ 10⁷ C of electricity

5.49 $$\times$$ 10⁴ C of electricity

5.49 $$\times$$ 10¹ C of electricity

AIEEE 2005

MCQ (Single Correct Answer)

-1

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 difluoroacetic acid