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.
What are the types of Litmus paper? 1  Red litmus paper: It is used to detect basicity. 2  Blue litmus paper: It is used to identify acids like sulphuric acid, nitric acid. 3  It is made by the treatment of plain paper with lichen blue dye. 4  Purple or neutral litmus paper: It can identify both acids and bases.