Exploring Substances Acidic Basic and Neutral Class 7 Science MCQ with Answer Chapter 2

Understanding the nature of substances around us is an important part of learning science. In our daily lives, we come across many substances such as lemon juice, vinegar, soap, toothpaste, and baking soda. Some of these substances are acidic, some are basic, while others are neutral. Chapter 2 – Exploring Substances Acidic, Basic and Neutral helps students understand the properties, uses, and identification of these substances through simple observations and experiments.

To help students prepare effectively for exams, Infinity Learn provides Exploring Substances Acidic, Basic and Neutral Class 7 Science MCQ with Answer based on the latest CBSE syllabus and NCERT curriculum. These MCQs are designed to improve conceptual understanding, strengthen problem-solving skills, and boost confidence before examinations. Whether you are revising for school exams or looking for Class 7 Science Chapter 2 MCQ with Answers PDF, these questions will help you master the chapter and perform better in assessments.

Exploring Substances Acidic Basic and Neutral Class 7 MCQ Online Test With Answers Questions

Prepare effectively for your exams with the latest Class 7 Science Chapter 2 MCQ Questions with Answers on Exploring Substances Acidic, Basic and Neutral. These multiple-choice questions have been carefully designed according to the latest class 7 CBSE syllabus and exam pattern to help students strengthen their understanding of important concepts.

At Infinity Learn, we provide chapter-wise Class 7 Science MCQ Questions with Answers PDF to make revision simple and effective. These Exploring Substances Acidic, Basic and Neutral Class 7 Science MCQs with Answers cover key topics such as acids, bases, neutral substances, indicators, and neutralization reactions. Regular practice of these MCQs will help students improve conceptual clarity, enhance problem-solving skills, and boost confidence for school exams and assessments.

Download Class 7 Science Chapter 2 MCQ With Answers PDF

Preparing for exams becomes easier when you have access to well-structured practice questions. The Class 7 Science Chapter 2 MCQ With Answers PDF is an excellent resource for students who want to strengthen their understanding of Exploring Substances Acidic, Basic and Neutral. This chapter introduces important concepts such as acids, bases, neutral substances, indicators, and neutralization reactions, which form the foundation for advanced scientific learning.

By practicing these questions regularly, students can enhance their conceptual clarity, boost confidence, and perform better in school examinations. Download the PDF and start practicing today to make your revision more effective and exam-ready with Infinity Learn.

Exploring Substances: Acidic, Basic and Neutral Class 7 Science MCQ Questions with Answers

1. Which day was the science fair organized?

A. National Mathematics Day

B. National Science Day

C. Children's Day

D. Earth Day

Answer: B. National Science Day

2. Which indicator was first used in the chapter activities?

A. Turmeric

B. Red rose extract

C. Litmus

D. Onion

Answer: C. Litmus

3. Litmus is obtained from:

A. Algae

B. Mosses

C. Lichens

D. Ferns

Answer: C. Lichens

4. Blue litmus turns red in:

A. Basic substances

B. Neutral substances

C. Acidic substances

D. Salts

Answer: C. Acidic substances

5. Red litmus turns blue in:

A. Acids

B. Bases

C. Neutral substances

D. Water

Answer: B. Bases

6. Which of the following is acidic?

A. Soap solution

B. Lime water

C. Lemon juice

D. Washing powder solution

Answer: C. Lemon juice

7. Which substance is basic?

A. Vinegar

B. Tamarind water

C. Baking soda solution

D. Amla juice

Answer: C. Baking soda solution

8. Which substance is neutral?

A. Vinegar

B. Salt solution

C. Lemon juice

D. Soap solution

Answer: B. Salt solution

Also Read: Class 7 Science Chapter 1 MCQ With Answers

9. Amla juice belongs to:

A. Basic group

B. Neutral group

C. Acidic group

D. Salt group

Answer: C. Acidic group

10. Vinegar is:

A. Acidic

B. Basic

C. Neutral

D. Alkaline salt

Answer: A. Acidic

11. Soap solution turns red litmus:

A. Red

B. Blue

C. Yellow

D. Green

Answer: B. Blue

12. Tap water is generally:

A. Acidic

B. Basic

C. Neutral

D. Salty

Answer: C. Neutral

13. Sugar solution is:

A. Acidic

B. Basic

C. Neutral

D. Saline

Answer: C. Neutral

14. Which of the following tastes sour?

A. Base

B. Acid

C. Salt

D. Neutral substance

Answer: B. Acid

15. Basic substances generally feel:

A. Rough

B. Sticky

C. Slippery

D. Dry

Answer: C. Slippery

16. Bases generally taste:

A. Sour

B. Sweet

C. Bitter

D. Salty

Answer: C. Bitter

17. Citric acid is commonly found in:

A. Soap

B. Lemon

C. Baking soda

D. Salt

Answer: B. Lemon

18. Tamarind contains:

A. Citric acid

B. Tartaric acid

C. Acetic acid

D. Oxalic acid

Answer: B. Tartaric acid

19. Vinegar contains:

A. Citric acid

B. Acetic acid

C. Formic acid

D. Lactic acid

Answer: B. Acetic acid

20. Curd contains:

A. Lactic acid

B. Citric acid

C. Formic acid

D. Oxalic acid

Answer: A. Lactic acid

21. Red rose extract acts as:

A. Fertilizer

B. Acid

C. Indicator

D. Salt

Answer: C. Indicator

22. Red rose extract turns _____ in acidic solution.

A. Green

B. Red

C. Yellow

D. Blue

Answer: B. Red

23. Red rose extract turns _____ in basic solution.

A. Red

B. Yellow

C. Green

D. Blue

Answer: C. Green

24. Which flower was used to prepare a natural indicator?

A. Sunflower

B. Rose

C. Lotus

D. Marigold

Answer: B. Rose

25. The liquid obtained after filtration is called:

A. Residue

B. Filtrate

C. Solvent

D. Sediment

Answer: B. Filtrate

26. Purple cabbage can act as:

A. Fertilizer

B. Acid-base indicator

C. Fuel

D. Salt

Answer: B. Acid-base indicator

27. Turmeric paper is prepared from:

A. Turmeric paste

B. Lime water

C. Vinegar

D. Soap solution

Answer: A. Turmeric paste

28. Turmeric paper is:

A. Red

B. Blue

C. Yellow

D. Green

Answer: C. Yellow

29. Turmeric turns red in:

A. Acidic solution

B. Neutral solution

C. Basic solution

D. Salt solution

Answer: C. Basic solution

30. Turmeric cannot distinguish between:

A. Acids and bases

B. Acids and neutral substances

C. Bases and neutral substances

D. Acids and salts

Answer: B. Acids and neutral substances

31. Onion is an example of:

A. Natural indicator

B. Olfactory indicator

C. Synthetic indicator

D. Universal indicator

Answer: B. Olfactory indicator

32. Substances whose odour changes in acidic or basic medium are called:

A. Acid-base indicators

B. Olfactory indicators

C. Litmus indicators

D. Universal indicators

Answer: B. Olfactory indicators

33. Who is known as the Father of Modern Indian Chemistry?

A. C.V. Raman

B. Jagadish Chandra Bose

C. P.C. Ray

D. Homi Bhabha

Answer: C. P.C. Ray

34. P.C. Ray established India's first pharmaceutical company in:

A. 1890

B. 1901

C. 1915

D. 1920

Answer: B. 1901

35. When lime water is added to lemon juice solution, the acidic effect is:

A. Increased

B. Neutralised

C. Unchanged

D. Removed permanently

Answer: B. Neutralised

36. The reaction between an acid and a base is called:

A. Combustion

B. Respiration

C. Neutralisation

D. Fermentation

Answer: C. Neutralisation

37. Neutralisation produces:

A. Salt and water

B. Acid and water

C. Base and water

D. Salt only

Answer: A. Salt and water

38. Neutralisation reaction releases:

A. Light

B. Sound

C. Heat

D. Smoke

Answer: C. Heat

39. Ant bites inject:

A. Citric acid

B. Acetic acid

C. Formic acid

D. Oxalic acid

Answer: C. Formic acid

40. The effect of an ant bite can be reduced by applying:

A. Lemon juice

B. Vinegar

C. Baking soda

D. Tamarind water

Answer: C. Baking soda

41. Excessive fertilizers can make soil:

A. Basic

B. Acidic

C. Neutral

D. Salty

Answer: B. Acidic

42. Acidic soil can be treated with:

A. Vinegar

B. Lemon juice

C. Lime

D. Tamarind

Answer: C. Lime

43. Basic soil can be treated by adding:

A. Baking soda

B. Lime water

C. Compost and manure

D. Soap solution

Answer: C. Compost and manure

44. Industrial acidic waste should be treated with:

A. Acids

B. Bases

C. Sugar solution

D. Salt solution

Answer: B. Bases

45. Hydrangea flowers become blue in:

A. Basic soil

B. Neutral soil

C. Acidic soil

D. Salty soil

Answer: C. Acidic soil

46. Hydrangea flowers become pink or red in:

A. Acidic soil

B. Basic soil

C. Neutral soil

D. Sandy soil

Answer: B. Basic soil

47. Which indicator gives red colour in acidic solution and green colour in basic solution?

A. Litmus

B. Turmeric

C. Red rose extract

D. Onion

Answer: C. Red rose extract

48. Which natural indicator is obtained from lichens?

A. Turmeric

B. Litmus

C. Rose extract

D. Onion

Answer: B. Litmus

49. Which solution can be used to write a hidden message on turmeric-coated paper?

A. Sugar solution

B. Salt solution

C. Soap solution

D. Water

Answer: C. Soap solution

50. Substances that are neither acidic nor basic are called:

A. Salts

B. Indicators

C. Neutral substances

D. Bases

Answer: C. Neutral substances

Why Practice Exploring Substances Acidic Basic and Neutral Class 7 Science MCQ With Answers?

Practicing Exploring Substances Acidic Basic and Neutral Class 7 Science MCQ With Answers helps students revise Chapter 2 quickly and understand important concepts like acids, bases, neutral substances, indicators, and neutralization. MCQs make learning simple because students can test their knowledge, check their mistakes, and improve their exam preparation. At Infinity Learn, these Class 7 Science MCQs are designed as per the latest CBSE syllabus and NCERT pattern, helping students build conceptual clarity and confidence.

Regular MCQ practice helps students:

• Understand acids, bases, and neutral substances clearly
• Learn the use of litmus, turmeric, and red rose indicators
• Improve speed and accuracy in exams
• Identify weak topics for better revision
• Prepare for school tests and online assessments
• Strengthen learning with NCERT-based questions

By solving these MCQs with answers, students can revise Chapter 2 effectively and score better in Science exams.