JEE Main 2015 (Offline) | Electrochemistry Question 189 | Chemistry

Resistance of 0.2 M solution of an electrolyte is 50 $$\Omega$$. The specific conductance of the solution is 1.4 S m^-1. The resistance of 0.5 M solution of the same electrolyte is 280 $$\Omega$$. The molar conductivity of 0.5 M solution of the electrolyte in S m² mol^-1 is :

5 × 10³

5 × 10²

5 × 10^-4

5 × 10^-3

JEE Main 2014 (Offline)

MCQ (Single Correct Answer)

-1

The equivalent conductance of NaCl at concentration C and at infinite dilution are $${\lambda _C}$$ and $${\lambda _\infty }$$, respectively. The correct relationship between $${\lambda _C}$$ and $${\lambda _\infty }$$ is given as: (where the constant B is positive)

$${\lambda _C} = {\lambda _\infty } + (B)C$$

$${\lambda _C} = {\lambda _\infty } - (B)C$$

$${\lambda _C} = {\lambda _\infty } - (B)\sqrt C$$

$${\lambda _C} = {\lambda _\infty } + (B)\sqrt C$$

JEE Main 2014 (Offline)

MCQ (Single Correct Answer)

-1

Given below are the half-cell reactions:

Mn²⁺ + 2e^- $$\to$$ Mn; E^o = -1.18 V

2(Mn³⁺ + e^- $$\to$$ Mn²⁺); E^o = +1.51 V

The E^o for 3Mn²⁺ $$\to$$ Mn + 2Mn³⁺ will be :

– 0.33 V; the reaction will not occur

– 0.33 V; the reaction will occur

– 2.69 V; the reaction will not occur

– 2.69 V; the reaction will occur

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