Question

The ratio of inversion temperature and Boyle's temperature for a real gas is ....

Answer 1

As we know,
for a real gas
Boyle's temperature ($T_b$) = $a/Rb$ = $1/2T_i$
where $T_i$ is called inversion temperature and $a,b$ are called van der Waals constant.
So, their ratio is 2.