What is the colour of litmus in acid?
a) red
b) blue
c) yellow
d) pink
What is the colour of litmus in alkali?
a) red
b) blue
c) yellow
d) pink
Explanation:Litmus is a water-soluble mixture of different dyesextracted from lichens. It is often absorbed onto filter paperto produce one of the oldest forms of pH indicator, used to test materials for acidity.
What is the colour of methyl orange in acid?
a) red
b) blue
c) yellow
d) pink
What is the colour of methyl orange in alkali?
a)red
b) blue
c) yellow
d) pink
Explanation:Methyl orange is a pH indicator frequently used in titration because of its clear and distinct color variance at different pH values. Methyl orange shows red color in acidic medium and yellow color in basic medium. Because it changes color at the pKa of a mid strength acid, it is usually used in titration for acids. Unlike a universal indicator, methyl orange does not have a full spectrum of color change, but it has a sharp end point. In a solution becoming less acidic, methyl orange changes from red to orange and, finally, to yellow—with the reverse process occurring in a solution of increasing acidity.
What is the colour of phenolphthalein in acid?
a) colourless
b) blue
c) yellow
d) pink
Explanation:phenolphthalein, (C20H14O4), an organic compound of the phthalein family that is widely employed as an acid-base indicator. As an indicator of a solution's pH, phenolphthalein is colourless below pH 8.5 and attains a pink to deep red hue above pH 9.0.
What is the colour of phenolphthalein in alkali?
a)colourless
b) blue
c) yellow
d)pink
