The values of conductivity of some materials at 298.15 K in are The number of conductors among the materials is

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Solution

Q.
The values of conductivity of some materials at 298.15 K in ${S m}^{- 1}$ 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 ___________ . [2024]

Ans.
(4)

Conductivity at 298.15 K (in ${Sm}^{- 1}$ ) Material Classification

$2.1 \times 10^{3}$ sodium conductor

$1.0 \times 10^{- 16}$ glass insulator

$1.2 \times 10$ graphite conductor

$3.91$ 0.1M HCl conductor

$1.5 \times 10^{- 2}$ Si semiconductor

$1 \times 10^{- 7}$ CuO semiconductor

$1 \times 10^{3}$ iron conductor

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