I have a lot of tokens of that i I earned from different bounties but I do not know how to sell them on exchange or how to check that any of them is on already on exchange or not?
You have joined bounties and you don't know how to sell them? that's new to me as far as I know most of the bounty hunters knows what to do after receiving the tokens they have worked for.
1. Visit the website of your token and see if there is an exchange that they are listed.
2. If they are listed, follow instructions on how you will send it to that exchange - this is easy.
3. If they are not listed, you have no way to sell them unless you can sell it to someone personally.
you can tell me about any market to exchange the token? I just confused the market