Uninstalling a module In order to un-install a module I disabled and deleted the folder from the root module folder. Though I have deleted the module yet it's showing in module list page. Why is this? Am I doing wrong?
Simply find the module name, and write the following command in your command-line/terminal/console to disable the module at first (by considering that the current path in your command-line is the Drupal project root directory):

drush dis moduleName -y


then after the completion of the executing the above command, write the following command to uninstall the module:

drush pm-uninstall moduleName -y


If you have several modules, you can list their names. For example for three modules, you can write:

drush dis moduleName1 moduleName2 moduleName3 -y 
drush pm-uninstall moduleName1 moduleName2 moduleName3 -y