Question

When a thermometer is taken from the melting ice to a warm liquid, the mercury level rises to ${\left(\frac{2}{5}\right)}^{th}$ of the distance between the lower and the upper fixed points. The temperature of liquid in K is

• A. $217.15$
• B. $313.15$
• C. $220$
• D. $330$

Answer 1

The correct option is B $313.15$

Given:

$T_b-T_f=100$

Temperature of liquid, $T=\frac{2}{5}$ distance between lower and upper fixed point

Temperature of liquid, $T=\frac{2}{5}\times 100={40}^{0}C$

On kelvin scale, $T_k=273.15+40$

$T_k=313.15K$

The correct option is B.