Tennis, squash, and racket ball
The sport is called Squash because when you hit the ball on a solid structure, the ball tends to "squash" on impact.
the chemicals of a squash ball is hydrogen chloride and nitrous oxide
They theoretically could be any colour - but they're usually black.
You stuff the squash ball in your top hand glove and what this effectively does is you can only use your bottom hand in a V. It is hard to get around the back of the bat with it, which means he improves your grip. --Harold
The diameter of a tennis ball is 2.63 inches, or 6.7 centimers. A squash ball's diameter is between 39.5 and 40.5 millimeters.