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Standard XII

Chemistry

Electronegativity

The respectiv...

Question

The respective temperatures of cold and hot junctions of a Sb- Bi and a Fe-Cu thermocouple are same. If $E_{1}$ and $E_{2}$ are the respective thermo emf developed in the two cases, then

E_{1} = E_{2}

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E_{1} < E_{2}

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E_{1} > E_{2}

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Cannot be predicted

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Solution

The correct option is B $E_{1} > E_{2}$
According to thermoelectric series, as the distance between the 2 materials in the series to form thermocouple increases, the thermo emf increases. In thermoelectric series Bi and Sb are at the extremes of the series ,therefore thermo emf of Sb-Bi is maximum.

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The respective temperatures of cold and hot junctions of a Sb- Bi and a Fe-Cu thermocouple are same. If E1 and E2 are the respective thermo emf developed in the two cases, then

The correct option is B E1>E2According to thermoelectric series, as the distance between the 2 materials in the series to form thermocouple increases, the thermo emf increases. In thermoelectric series Bi and Sb are at the extremes of the series ,therefore thermo emf of Sb-Bi is maximum.

The respective temperatures of cold and hot junctions of a Sb- Bi and a Fe-Cu thermocouple are same. If $E_{1}$ and $E_{2}$ are the respective thermo emf developed in the two cases, then

The correct option is B $E_{1} > E_{2}$
According to thermoelectric series, as the distance between the 2 materials in the series to form thermocouple increases, the thermo emf increases. In thermoelectric series Bi and Sb are at the extremes of the series ,therefore thermo emf of Sb-Bi is maximum.