why is my urine smells chlorine?

It could be the urea that is naturally in urine, which is converted and expelled ammonia. The ability to smell a strong concentration would indicate a low hydration content in your body (drink more water). If it is dark in color this would correlate with dehydration as the body’s waste becomes more concentrated without the dilution of water.

In the end, this is really a question for a doctor who can confirm theories with tests.

Because your grammar glands are malfunctioning.

Perhaps the toilet you are using has a chlorine tab in the tank as a disinfectant.