Which of the following 'indicators' is used to test the nature of solutions besides litmus paper?
Turmeric and red cabbage juice
Correct Answer: Turmeric and red cabbage juice
Natural substances that can act as acid-base indicators (change colour with pH):
- Turmeric: Yellow in neutral/acid; red/brown in base (becomes red with NaOH)
- Red cabbage juice: Contains anthocyanins; purple in neutral, red in acid, green/yellow in base
- China rose (Gudhal): Pink/dark pink in acid; green in base
- Litmus: Most common; red in acid, blue in base
Sand, sugar, salt, and alcohol are not indicators as they do not change colour with pH.
Similar Questions
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The molecular mass of carbon dioxide is:
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If the molecular mass of nitrogen gas (N2) is 28, what is the atomic mass of a single nitrogen atom?
Which of the following solutions has the lowest hydrogen ion concentration?
Molecules of compounds are formed by:
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Important Questions from Basic Concepts of Chemistry
Which of the following pair is correct?
I. Isotopes – different mass numbers
II. Isobars – different atomic numbers
Which of the following is a zone of a flame?
I. Dark
II. Luminous
III. Non-Luminous
Sphalerite is an ore of:
If formula of sodium salt of an anion X is \(Na_2X\) , then the formula of its aluminium salt would be
Which of the following set contains same number of molecules?
A. 1 gram O 2, 2 grams SO 2
B. 1 gram CO 2, 1 gram N 2O
C. 1 gram O 2, 1 gram O 3
