- Litmus: A natural dye
- Turmeric is another natural indicator
- China Rose as Indicator
Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution? Explain.
Mark ‘T’ if the statement is true and ‘F’ if it is false:
Indicator is a substance which shows different colours in acidic and basic solutions. (T/F)
Three liquids are given to you. One is hydrochloric acid, another is sodium hydroxide and the third is a sugar solution. How will you identify them? You have only turmeric indicator.
Consider the following statements:
a) Both acids and bases change colour of all indicators.
b) If an indicator gives a colour change with an acid, it does not give a change with a base.
c) If an indicator changes colour with a base, it does not change colour with an acid.
d) Change of colour in an acid and a base depends on the type of the indicator.
Which of these statements are correct?