Question

The steam point and ice point of a mercury thermometer are marked as $80^{o}$ and $10^{o}$ . At what temperature on centigrade scale the reading of this thermometer will be $59^{o}$ ?

• A. $70^{o}C$
• B. $60^{o}C$
• C. $80^{o}C$
• D. none of these

Answer 1

Answer: (A)

$\frac{T ′ - 10}{80 - 10}=\frac{T_{C}}{100}$
$\frac{59 - 10}{80 - 10}=\frac{T_{C}}{100}$
$T_{C}=70^{o}C$