how can i set timer for a single question in a form

Unfortunately, Timer Widgets allow you to create actions for blocking whole form but not a single question. I'll create a feature request about it. Please be noted that creating a feature request does not ensure you that the feature will be integrated. It completely depends up on the feasibility and priority of our back end team. We will get back to you as soon as we have any update from them.

If you have any further question please let us know.