What colour does turmeric become in contact with a basic substance?
Answer and explanation
Correct answer: Reddish-brown
Turmeric contains curcumin, which acts as a natural acid-base indicator. Its original yellow colour remains in acidic or neutral conditions, but in the presence of a basic substance it changes to a reddish-brown colour. Hence option B is correct. The unchanged yellow colour is not evidence of a base, and green or blue are not the characteristic turmeric response to alkalinity.
Frequently asked questions
What is the correct answer to this question?
Reddish-brown
Why is this the correct answer?
Turmeric contains curcumin, which acts as a natural acid-base indicator. Its original yellow colour remains in acidic or neutral conditions, but in the presence of a basic substance it changes to a reddish-brown colour. Hence option B is correct. The unchanged yellow colour is not evidence of a base, and green or blue are not the characteristic turmeric response to alkalinity.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
