When you ask a question to the whole class, it is often the case that only a small number of students are willing to answer it and it is usually the same few students.  Here is a way to let all students answer questions in remote synchronous teaching, especially quick questions that require short answers (can be Yes/No or True/False questions or short answers).

Pose a question and ask everyone to write a response in the chat (does not matter what videoconference software you use) but do not send it yet. The answers will be sent simultaneously at the designated time (in 30 seconds, 1 minute, etc ). When the time comes say, “hit enter and send your response”.

This is a quick and low tech way of getting answers from everyone in the class.