You Do Need power plug adapter while traveling from Liechtenstein to Pakistan.

Here is Why You Need An Adapter

The outlet and plug type used in Pakistan are C and D and in Liechtenstein are C and J. This is how they look like.

Liechtenstein

In Liechtenstein, outlets of type C and J are in use.

Type C

Type J

Pakistan

In Pakistan, outlets of type C and D are in use.

Type C

Type D