The values of conductivity of some materials at 298 .15 K in Sm − 1 are 2 .1 × 10 3 , 1 .0 × 10 − 16 , 1 .2 × 10 , 3 .91 , 1 .5 × 10 − 2 , 1 × 10 − 7 , 1 .0 × 10 3 . The number of conductors among the

Question

The values of conductivity of some materials at 298 .15 K in Sm − 1 are 2 .1 × 10 3 , 1 .0 × 10 − 16 , 1 .2 × 10 , 3 .91 , 1 .5 × 10 − 2 , 1 × 10 − 7 , 1 .0 × 10 3 . The number of conductors among the materials is _____.

TestHub · Accepted Answer

Molar conductivity is the conductance property of a solution containing one mole of the electrolyte, or it is a function of the ionic strength of a solution or the concentration of salt.

$Λ_{m} = K / C$

Where $K$ is the specific conductivity and

$C$ is the concentration in mole per litre.

Conductivity $({Sm}^{- 1})$

$\begin{array}{l} 2 .1 \times 10^{3} \\ 1 .2 \times 10 \\ 3 .91 \\ 1 \times 10^{3} \end{array}\}$ conductors at $298 .15 K$

$1 \times 10^{- 16}$ Insulator at $298 .15 K$

$\begin{array}{l} 1 .5 \times 10^{- 2} \\ 1 \times 10^{- 7} \end{array}\}$ Semiconductor at $298 .15 K$

Therefore number of conductors is $4$ .

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