1) My question is after using the toilet, when I wash my hands I feel some small splash backs coming on my stomach (the water by which I am washing my najis hands is getting splashed back on me). Are those tiny drops najis and how do people avoid them since water is ought to splash back when you wash your hands in wash basin?

2) How do I recognize najis drops and the pure ones. I used to think that they all are najis since they were splashed from my hands which were najis at that time

1) Those small drops that get splashed are considered pure as long as you don’t have certainty that there is a najes drop in them. Islamic Law considers it pure

2) As long as you don’t visibly see traces of urine, then you may consider the drops to be pure per the Law of Purity.