Among the following changes can not increase the volume of a gas by 4 times, are

According to gas laws, we have an equation  that is

$\frac{{\mathrm{P}}_1{\mathrm{V}}_1}{{\mathrm{T}}_1}=\frac{P_2{V}_2}{T_2}$

When T is doubled and P is reduced to half and then volume will become

$\frac{\mathrm{pv}}{\mathrm{T}}=\frac{p{v}_2}{2\times 2T}$

Then ${\mathrm{V}}_2=4\mathrm{V}$

 According to Charle’s law at constant pressure for a fixed amount of gas volume is directly proportional to temperature. So, when we increase T by 4 times then V of gas also increased by 4 times.

As per Gay Lussac’s law, at constant volume for a fixed amount of gas

$\mathrm{P\alpha T}$

Here, T is absolute temperature (T in Kelvin)

 Whereas t in degree Celsius, so the statement given that ‘t’ is double, P is decreased to half is incorrect