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Question
Turmeric is used as a _______.
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Solution
Turmeric is used as a indicator.
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RELATED QUESTIONS
Is the distilled water acidic/basic/neutral? How would you verify it?
- Both acids and bases change colour of all indicators.
- If an indicator gives a colour change with an acid, it does not give a change with a base.
- If an indicator changes colour with a base, it does not change colour with an acid.
- Change of colour in an acid and a base depends on the type of the indicator.
Which of these statements are correct?
What colour does the following indicator turn when added to a base or alkali (such as sodium hydroxide)?
Litmus
What is a universal indicator? For what purpose is it used?
What does the pH of a solution signify? Three solution A, B and C have pH values of 6, 4 and 10 respectively. Which of the solutions is highly acidic?
Someone put some universal indicator paper into vinegar. The pH is 3. What does this tell you about the vinegar?
Here are some results of solutions tested with universal indicator paper:
| Sulphuric acid | : Red |
| Metal polish | : Dark blue |
| Washing-up liquid | : Yellow |
| Milk of magnesia | : Light blue |
| Oven cleaner | : Purple |
| Car batter acid | : Pink |
Arrange the solutions in order of their increasing pH value (starting with the one with the lowest pH).
A student prepares solutions of (i) an acid and (ii) a base in two separate beakers. She forgot to label the solutions and litmus paper is not available in the laboratory. Since both the solutions are colourless, how will she distinguish between the two?
Turmeric and litmus are ______ acid-base indicators.
Methyl orange gives ______ colour in an acidic solution.
