Select a pair of natural indicator from the following:
Select a pair of natural indicator from the following:
Options
Official answer
B
Marking scheme
- 1.1 Mark for selecting the correct option (B).
Hint
Look for indicators that are obtained from natural sources like plants or lichens, rather than synthesized in a laboratory.
Quick oral answer
Litmus and turmeric are natural indicators. Litmus is obtained from lichens, while turmeric is a common kitchen spice that turns reddish-brown in basic solutions.
Common mistakes
- 1.Confusing synthetic indicators like methyl orange or phenolphthalein with natural indicators.
Analysis and explanation
According to the NCERT text, litmus is a natural indicator extracted from lichen (a plant belonging to the division Thallophyta), and turmeric is another natural indicator. On the other hand, methyl orange and phenolphthalein are synthetic indicators. Therefore, the pair of natural indicators is Turmeric and Litmus (Option B).
- Option A is incorrect because methyl orange is a synthetic indicator.
- Option C is incorrect because both phenolphthalein and methyl orange are synthetic indicators.
- Option D is incorrect because methyl orange is a synthetic indicator.
Interesting facts
Litmus solution is a purple dye extracted from lichens, which are symbiotic associations between algae and fungi.
Question details
Q2 of 39 questions
- Board
- CBSE
- Class
- Class 10
- Subject
- Science
- Year
- 2024
- Section
- Section A
- Marks
- 1
- Type
- MCQ
- Chapter
- Acids, Bases and Salts
- Topic
- Indicators
- Bloom's level
- Remembering
- Syllabus topic
- Acids, bases and salts: Their definitions in terms of furnishing of H+ and OH- ions, General properties, examples and uses, concept of pH scale, importance of pH in everyday life
Spotted a mistake or something unclear?
Tell us and we will fix it.
Frequently asked questions
How many marks does this question carry in CBSE Class 10 Science 2024?
This question carries 1 mark in the CBSE Class 10 Science 2024 examination.
Which chapter does this question come from in Science?
This question is from the chapter "Acids, Bases and Salts" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "Indicators" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2024 paper?
This is a MCQ question from Section A in the CBSE Class 10 Science 2024 paper.