Value of absolute zero of temperature in degree Celsius (° C) can be determined by given data. The density of an ideal gas at 25° C and 100° C are 1.5 and 1.2 g/L, respectively, both at the same pressure. The value of absolute zero of temperature in degree Celsius (° C) is :

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-273° C

-275° C

- 200° C

-0° C

answer is B.

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Detailed Solution

Let x is the value of absolute zero of temperature in degree Celsius (° C) then, density is given by

$d = \frac{PM}{RT}$

$\Rightarrow d_{1} T_{1} = d_{2} T_{2}$

$\begin{array}{l} 1.5 \times (x + 25) = 1.2 \times (x + 100) \\ x = 275 \end{array}$

Hence, absolute zero is -275° C

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