Question

the most commonly used natural indicator Litmus is extracted from

Answer 1

an acid (e.g. vinegar, lemon juice), purple in an alkali (e.g. bicarbonate of soda, bleach) and green in something that is neutral (e.g. water). Many plants contain their own indicators – turmeric, red cabbage juice and beetroot juice are three good examples. Other examples are tea and red grape juice.