$ sudo apt-get remove konqueror 

Uninstall konqueror including dependent package

If you would like to remove konqueror and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove konqueror 

Use Purging konqueror

If you use with purge options to konqueror package all the configuration and dependent packages will be removed.

$ sudo apt-get purge konqueror 

If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.

$ sudo apt-get purge --auto-remove konqueror 

See Also,