Context:
1: Will this step of government put stop to all those criminal activities?
2: Will this step of government put stop on all those criminal activities?
The second sounds right according to me but on internet in many contexts, "to" seems to be correct.
Best Answer
The first one is (almost) correct, and while I can think of a much more limited example where the second one would work (see below), it is incorrect as you have used it.
I say the first one is almost correct because it isn't "put stop to...," but rather, "put a stop to..."
So, to use your example, "Will the government put a stop to all those criminal activities?"
The only example I can think of where "put a stop ON" would be used is in reference to a non-cash payment that has been issued and subsequently withdrawn: "I paid for the tickets, but decided to put a stop on my check when I didn't receive them."
This would mean that the buyer sent the check to the seller, but then called his/her bank and had them block the receipt of this check by the seller when the buyer did not receive the tickets as promised from the seller.