Is it okay to post any asked question link in mathematics chat room to get attention, and get answer soon? I was thinking if I had did some thing wrong by posting in chat room to get answer.
No, it is in general not okay to do this. The rule of thumb to decide such things is to imagine what would happen if everybody did that. The chat room would be completely swamped. In addition users looking for questions to answer usually look on the main site anyway and not in chat.
This does not mean that it is never alright. But as a rule, please, don't do this.