No, unfortunately, putting bleach in your urine will alter the pH, and it will be obvious that you have tampered with the sample.
Please don't think that drinking bleach will help either. If it doesn't kill you, it will at least make a horrible mess of your stomach, mouth and throat.
The best way to pass the drugs test is to find out when it is and stay drug-free for at least five days. However, this will depend on how long you have been using, your age, weight and metabolism, etc. In heavy users, cocaine can still be detected after 14 days.
I know that stopping for a while will be difficult, and may not be something you can do, but if the test is important, hopefully, you will give it a try.
Drinking lots of water, exercising (sweating helps too) and peeing will all help a little so you could try that as a last resort, but please don't try bleach.
I hope all goes well, and you pass the test, good luck!