JEE MAIN - Chemistry (2019 - 10th April Morning Slot - No. 19)
Consider the statements S1 and S2
S1 : Conductivity always increases with decrease in the concentration of electrolyte.
S2 : Molar conductivity always increases with decrease in the concentration of electrolyte.
The correct option among the following is :
S1 : Conductivity always increases with decrease in the concentration of electrolyte.
S2 : Molar conductivity always increases with decrease in the concentration of electrolyte.
The correct option among the following is :
Both S1 and S2 are wrong
S1 is correct and S2 is wrong
Both S1 and S2 are correct
S1 is wrong and S2 is correct
Explanation
We know conductivity (k) = $${G \over V}$$
V = volume
When concentration decreases volume increases and when volume increases then conductivity (k) decreases.
So, we can say S1 is incorrect.
We know that,
$${\lambda _m} = {k \over c}$$
where
$$\lambda $$m = molar conductivity
k = conductivity
c = concentration
So, when concentration decreases molar conductivity increases.
So, we can say S2 is correct.
V = volume
When concentration decreases volume increases and when volume increases then conductivity (k) decreases.
So, we can say S1 is incorrect.
We know that,
$${\lambda _m} = {k \over c}$$
where
$$\lambda $$m = molar conductivity
k = conductivity
c = concentration
So, when concentration decreases molar conductivity increases.
So, we can say S2 is correct.
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