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.
Solutions with pH levels below seven are considered acidic. Those with pH levels at seven are considered neutral. Litmus paper is paper that has been treated with a mixture of natural dyes known as lichens, or Roccella tinctoria. Litmus paper is not the only method of using color change to detect pH level. One natural way to do so is to use red cabbage juice. It appears red in acidic solutions, blue in neutral ones and greenish-yellow is base solution with pH levels at 12.