Question

Which of the following curves represents Henry’s law ?

• A.
• B.
• C.
• D.

Answer 1

The correct option is C


According to Henry's law, $m=KP$
where,
$m$ is the solubility in terms of molality
$K$ is the Henry's law constant
$P$ is the pressure in atm.
Take logarithm on both sides.
$logm=logK+logP$
This is the equation for straight line
$y=mx+c$
$mx=logP$
$c=logK$
Thus, when $logm$ is plotted against $logK$ , a straight line is obtained with slope of 1 and
intercept of $logK$ which matched with option A