The values of conductivity of some materials at $298.15 \mathrm{~K}^{-1} ~\text{in} ~\mathrm{Sm}^{-1}$ are $2.1 \times 10^3$,
$1.0 \times 10^{-16}, 1.2 \times 10,3.91,1.5 \times 10^{-2}, 1 \times 10^{-7}, 1.0 \times 10^3$.
The number of conductors among the materials is _____________.
Answer (integer)
4
Solution
<p>Conductivity (S m$^{-1}$)</p>
<p>$$\left.\begin{array}{l}
2.1 \times 10^3 \\
1.2 \times 10 \\
3.91 \\
1 \times 10^3
\end{array}\right\} \text { conductors at } 298.15 \mathrm{~K}$$</p>
<p>$1 \times 10^{-16} \text { Insulator at } 298.15 \mathrm{~K}$</p>
<p>$$\left.\begin{array}{l}
1.5 \times 10^{-2} \\
1 \times 10^{-7}
\end{array}\right\} \text { Semiconductor at } 298.15 \mathrm{~K}$$</p>
<p>Therefore number of conductors is 4.</p>
About this question
Subject: Chemistry · Chapter: Electrochemistry · Topic: Electrochemical Cells
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