You can use the select topics feature to select multiple topics at once and Close them or unlist them from there.
Please note the following:
- Closed Topics can be seen by anyone that has permissions to see the category.
- Unlisted Topics are completely hidden from the public community. However, Admins and Moderators can still see hidden topics but everyone else won’t be able to.
- Flagged Topics will be hidden from the community if anyone flags a post too many times.