A gas at 298 K is shifted from a vessel of 250 cmଷ capacity to that of 1L capacity. The pressure of the gas will

According to Boyles law

$\mathrm{P\alpha }\frac{1}{\mathrm{v}}(\mathrm{at} \mathrm{constant} \mathrm{T},\mathrm{n})$

If a gas shifted from a vessel of 250 ${\mathrm{cm}}^3$  capacity to that of 1L capacity.  That means volume becomes four times.  So, the pressure of the gas will decrease to one-fourth of the original volume.

$\mathrm{Le} 250\times {\mathrm{P}}_1=1000\times {\mathrm{P}}_2$

$\frac{{\mathrm{p}}_2}{{\mathrm{p}}_1}=\frac{1}{4}\left(or\right)P_2=\frac{1}{4}{P}_1$