NEET 2023 — Chemistry solution

NEET2023Chemistry

The conductivity of centimolar solution of KCl at $2 5^{\circ}$ C is $0.0210$ ohm $^{- 1}$ cm $^{- 1}$ and the resistance of the cell containing the solution at $2 5^{\circ}$ C is $60$ ohm. The value of cell constant is:

A
$3.28$ cm $^{- 1}$
B
$1.26$ cm $^{- 1}$
C
$3.34$ cm $^{- 1}$
D
$1.34$ cm $^{- 1}$

Solution

Conductivity and resistance are linked by $κ = \frac{1}{R} (\frac{ℓ}{A})$ , where $\frac{ℓ}{A}$ is the cell constant $G^{*}$ .

$G^{*} = κ \cdot R = 0.0210 \times 60 = 1.26$ cm $^{- 1}$ .

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