$ sudo apt-get update
$ sudo apt-get install libqtconnectivity1 

libqtconnectivity1 is installed in your system.

Make ensure the libqtconnectivity1 package were installed using the commands given below,

$ sudo dpkg-query -l | grep libqtconnectivity1 *

You will get with libqtconnectivity1 package name, version, architecture and description in a table

libqtconnectivity1 package basic information: