What is the difference between hard return and soft return? A hard return is when the user hits the return or enter key to bring subsequent text onto a new line. If you keep typing until the text reaches the end of the line and it star â¦ ts on a new line itself automatically, that is a soft return.
Definition of litmus. 1  1 : a coloring matter from lichens that turns red in acid solutions and blue in alkaline solutions and is used as an acid-base indicator. 2  2 : the critical factor in a litmus test; also : litmus test.
Litmus test is a test done to find out whether a given compound is acidic, basic or amphoteric in nature. It is a natural chemical indicator that shows color change with pH(hydrogen ion concentration) change. While acid turns blue litmus red a base or alkali turns red litmus blue.