Courses

Courses for Kids

Free study material

Talk to our experts

1800-120-456-456

Important Questions and Answers for Class 7 Science Chapter 2 Exploring Substances Acidic Basic And Neutral 2025-26

Q: 1. What types of important questions are most frequently asked from Class 7 Science Chapter 2: Exploring Substances Acidic Basic and Neutral?

The most frequent questions from this chapter include MCQs, short answer, long answer, and case-based questions. Focus on types like: Explaining acidic, basic, and neutral substances with examplesDifferences between acids and basesUses and importance of indicatorsThese are exam-focused and often seen in school tests.

Q: 2. How should I structure answers for important questions to score full marks in Chapter 2?

Structure your answers using keywords, clear steps, and diagrams when needed. Use a simple three-part format: Start with a defining sentence or introduction.Add bullet points or steps for main points.End with a closing line or result.Highlight terms like ‘indicator’, ‘acidic’, and ‘pH’ for better marks.

Q: 3. Where can I find the Class 7 Science Chapter 2 exploring substances: acidic, basic and neutral important questions PDF?

You can get a class 7 science chapter 2 exploring substances acidic basic and neutral PDF with all important questions and answers from Vedantu’s study resources. It’s helpful for offline revision and last-minute exam prep. Always use the latest CBSE syllabus to verify you have all relevant topics included.

Q: 4. Which subtopics in Chapter 2 have the highest exam weightage for important questions?

The high-weightage subtopics are indicators and their types, properties of acids and bases, and classification of substances. Focus revision on: Examples of acids, bases, and neutral substancesUse of litmus paper and other indicatorsEveryday examples of acid and base usage

Q: 5. Do I need to draw diagrams or include tables to answer important questions in this chapter?

Not every answer needs a diagram, but using labelled diagrams or tables for indicators and classification can secure extra marks. For questions on indicator changes or properties, drawing small tables or neat diagrams makes your answer clearer and helps examiners with step-marking.

Q: 6. What is the best way to practice or revise important questions from Chapter 2 for quick exam preparation?

To revise quickly, use a worksheet or short-answer list focusing on acidic, basic, and neutral substances. Practice: Daily timed writing of 3-5 questionsMCQs and one-word answers for rapid recallRewriting notes or flowcharts for key concepts

Q: 7. Are extra and HOTS (Higher Order Thinking Skills) questions important for scoring well in Class 7 Science Chapter 2?

Yes, practicing extra and HOTS questions helps improve your understanding and prepares you for unexpected exams. HOTS questions require you to analyse situations, apply concepts to new examples, and compare substances. Answering these also sharpens your reasoning skills and increases your marks in application-based questions.

Exploring Substances: Acidic Basic And Neutral Question Answer for CBSE Exam Preparation

On this page, you will find Important Questions Class 7 Science Chapter 2 Exploring Substances Acidic Basic And Neutral. Here, we bring you all the exploring substances: acidic, basic, and neutral question answer sets your exams may ask. These questions are sorted for Class 7 CBSE Science, Chapter 2, and follow the NCERT syllabus closely.

This chapter discusses acids, bases, and neutral substances using simple experiments and facts. Using Vedantu’s Important Questions with Answers, you can learn all about class 7 science chapter 2 exploring substances acidic basic and neutral pdf and other chapter materials. Every answer is explained step by step, following school exam requirements.

Practicing these questions helps students remember important facts and write clear answers during exams. Each set includes key points and sample diagrams to make revision simple. Download the Important Questions PDF for free and make your Class 7 Science Chapter 2 preparation effective and easy.

Exploring Substances: Acidic Basic And Neutral Question Answer for CBSE Exam Preparation

1. Multiple choice questions.

Q1. Which of the following substances does NOT change the colour of blue or red litmus paper?

(a) Lemon juice
(b) Tap water
(c) Vinegar
(d) Soap solution

Answer: (b) Tap water.

Q2. What colour does turmeric paper turn in a basic solution?

(a) Red
(b) Yellow
(c) Blue
(d) Green

Answer: (a) Red.

Q3. Which group contains only basic substances as per the chapter?

(a) Lemon juice, vinegar, amla juice
(b) Sugar solution, tap water, salt solution
(c) Soap solution, baking soda solution, lime water
(d) Vinegar, tamarind water, amla juice

Answer: (c) Soap solution, baking soda solution, lime water.

Q4. Which indicator can be prepared using a common kitchen spice?

(a) Litmus
(b) Turmeric paper
(c) Red rose extract
(d) Hibiscus extract

Answer: (b) Turmeric paper.

2. Very Short Answer (VSA).

Q1. What is an acid-base indicator?

Answer: Acid-base indicators are substances that show different colours in acidic and basic solutions, helping to identify the nature of other substances.

Q2. Name one natural acid-base indicator found in plants.

Answer: Red rose extract is a natural acid-base indicator that changes colour in acidic and basic solutions.

Q3. What indicates a neutral substance during a litmus test?

Answer: Neutral substances do not change the colour of either red or blue litmus paper.

Q4. What is the colour change seen in blue litmus paper with acids?

Answer: Acids turn blue litmus paper to red.

3. Short Answer Questions.

Q1. Explain with an example how neutralisation helps in daily life.

Answer: Neutralisation is useful when an ant bites and injects formic acid into the skin. Applying moist baking soda, a base, neutralises the acid and relieves pain. This reaction produces salt and water, reducing the burning sensation.

Q2. Describe the steps to prepare turmeric paper as an indicator at home.

Answer: To prepare turmeric paper, make a paste of turmeric and water, dip filter paper into the paste, and let it dry. Then, cut the yellow paper into strips. These strips can test for basic substances by observing the colour change to red.

Q3. How can one make red rose extract for testing acids and bases?

Answer: Collect fallen red rose petals, wash, and crush them. Soak in hot water for 5-10 minutes, cover, then filter the coloured liquid. Use this extract to test: it turns red with acids and green with bases.

Q4. Why does turmeric stain on a white shirt turn red when soap is applied?

Answer: Soap is basic in nature. When soap touches a turmeric stain, the basic property changes the yellow colour to red, showing turmeric acts as a natural indicator for bases.

Q5. What is the purpose of adding manure to basic soil?

Answer: Manure is added to basic soil because it releases acids that neutralise the soil’s basicity, making it suitable for healthy plant growth.

4. True or False Questions.

Q1. Acids turn red litmus paper blue.

Answer: False.

Q2. Neutral substances do not affect either red or blue litmus paper.

Answer: True.

Q3. Turmeric paper can differentiate between acidic and neutral substances.

Answer: False.

Q4. Addition of a base to an acidic solution always results in a neutral solution immediately.

Answer: False.

3. Fill in the Blanks Questions.

Q1. ________ is a natural indicator obtained from lichens.

Answer: Litmus.

Q2. When an acid and a base react, they produce salt, water, and ________.

Answer: Heat.

Q3. Extract of red rose gives ________ colour in acidic solutions and green in basic solutions.

Answer: Red.

Q4. The yellow colour of turmeric turns ________ in basic solutions.

Answer: Red.

Q5. Substances like tap water and sugar solution are ________ in nature.

Answer: Neutral.

Benefits of Learning About Acids, Bases, and Neutral Substances in Class 7 Science

Exploring substances: acidic, basic, and neutral question answer helps develop basic science skills. By understanding indicators, students can better relate to class 7 science chapter 2 exploring substances acidic basic and neutral pdf topics and experiment at home with natural indicators from their kitchen.

Solving class 7 science chapter 2 exploring substances: acidic, basic and neutral notes and extra question answers prepares learners for higher grades. These worksheets and MCQs encourage critical thinking, making concepts clear through real-life examples and hands-on activities.

For students searching for exploring substances: acidic, basic and neutral class 7 worksheet or extra question answers, this chapter guides you to identify acids, bases, and neutrals easily. The chapter’s activities boost observation and application—skills crucial for everyday life and science exams.

FAQs on Important Questions and Answers for Class 7 Science Chapter 2 Exploring Substances Acidic Basic And Neutral 2025-26

1. What types of important questions are most frequently asked from Class 7 Science Chapter 2: Exploring Substances Acidic Basic and Neutral?

The most frequent questions from this chapter include MCQs, short answer, long answer, and case-based questions. Focus on types like:

Explaining acidic, basic, and neutral substances with examples
Differences between acids and bases
Uses and importance of indicators

These are exam-focused and often seen in school tests.

2. How should I structure answers for important questions to score full marks in Chapter 2?

Structure your answers using keywords, clear steps, and diagrams when needed. Use a simple three-part format:

Start with a defining sentence or introduction.
Add bullet points or steps for main points.
End with a closing line or result.

Highlight terms like ‘indicator’, ‘acidic’, and ‘pH’ for better marks.

3. Where can I find the Class 7 Science Chapter 2 exploring substances: acidic, basic and neutral important questions PDF?

You can get a class 7 science chapter 2 exploring substances acidic basic and neutral PDF with all important questions and answers from Vedantu’s study resources. It’s helpful for offline revision and last-minute exam prep. Always use the latest CBSE syllabus to verify you have all relevant topics included.

4. Which subtopics in Chapter 2 have the highest exam weightage for important questions?

The high-weightage subtopics are indicators and their types, properties of acids and bases, and classification of substances. Focus revision on:

Examples of acids, bases, and neutral substances
Use of litmus paper and other indicators
Everyday examples of acid and base usage

5. Do I need to draw diagrams or include tables to answer important questions in this chapter?

Not every answer needs a diagram, but using labelled diagrams or tables for indicators and classification can secure extra marks. For questions on indicator changes or properties, drawing small tables or neat diagrams makes your answer clearer and helps examiners with step-marking.

6. What is the best way to practice or revise important questions from Chapter 2 for quick exam preparation?

To revise quickly, use a worksheet or short-answer list focusing on acidic, basic, and neutral substances. Practice:

Daily timed writing of 3-5 questions
MCQs and one-word answers for rapid recall
Rewriting notes or flowcharts for key concepts

7. Are extra and HOTS (Higher Order Thinking Skills) questions important for scoring well in Class 7 Science Chapter 2?

Yes, practicing extra and HOTS questions helps improve your understanding and prepares you for unexpected exams. HOTS questions require you to analyse situations, apply concepts to new examples, and compare substances. Answering these also sharpens your reasoning skills and increases your marks in application-based questions.