Does PODS get rescheduled if Kubernetes node gets killed due to power failure?

Warning: this answer is based on the assumption you don't create an ad-hoc Pod, but instead manage your pods via a Deployment, StatefulSet, DaemonSet or any other controller. If it's an ad-hoc pod you created manually - it won't be rescheduled.

Does pod running on a Kubernetes node gets rescheduled if the Kubernetes nodes gets killed due to power failure.

Whether and when it gets rescheduled depends on its node.kubernetes.io/not-ready and node.kubernetes.io/unreachable tolerations.

As of current stable kubernetes here are the defaults:

  tolerations:
    - key: node.kubernetes.io/not-ready
      operator: Exists
      effect: NoExecute
      tolerationSeconds: 300
    - key: node.kubernetes.io/unreachable
      operator: Exists
      effect: NoExecute
      tolerationSeconds: 300

So, with these defaults - a pod on a died node would be rescheduled after 300 seconds (5 minutes).

And if gets rescheduled and if that nodes comes up what happens to the pod running on that node?

If a node is restarted - then a pod won't be started on next boot, and the kubelet would cleanup everything needed.