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Indicators

Which colour ...

Question

Which colour does a turmeric turn into in the presence of bases?

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Solution

Turmeric
Turmeric turns into a deep red colour in the presence of bases.
Turmeric acts as an acid-base indicator.
On reacting with bases, it changes its colour to deep red.
This red colour can change to yellow colour when we add acid to it.

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Similar questions

Q. (a) What is an indicator? Name three common indicators.
(b) Name the acid-base indicator extracted from lichen.
(c) What colour does the turmeric paper turn when put in an alkaline solution?

Q. State whether the following properties are those of acids, alkalies or both.
(a) sour taste
(b) pH value greater than 7
(c) changes the colour of litmus
(d) soapy to touch
(e) remains colourless in phenolphthalein
(f) may be strong or weak
(g) neutralises bases
(h) dangerous to handle
(i) usually react with metals
(j) turns red in the presence of turmeric

Turmeric, a natural indicator in presence of bases turns:

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Why does turmeric changes colour into red when we put lemon juice in it

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