Is cocoa powder the same thing as chocolate powder? No. Chocolate powder is ground chocolate, which has sugar and other ingredients that cocoa powder does not have. no cocoa powder is pure and chocolate powder is processed.
A knot is used to join two ropes together or a rope to itself while a hitch is used to tie the rope to another object, such as a pole.
It is easy to tie in a number of different ways and to untie. It has a wide variety of uses but care should be taken not to misuse it: it is so easy to use it when a more suitable hitch (e.g. a Rolling Hitch etc.) would serve better.