CBSE Class 10 Science Case Study MCQs
CBSE Class 10 Science – Case Study MCQs
Class: 10 | Subject: Science
Section: Exam Oriented
Topic: Case Study Based MCQs
Based on Latest CBSE Board Examination Pattern
Section: Exam Oriented
Topic: Case Study Based MCQs
Based on Latest CBSE Board Examination Pattern
These Case Study Multiple Choice Questions (MCQs) are designed strictly as per the NCERT syllabus, making them ideal for CBSE Class 10 Science Board Examinations.
Case Study 1: A student tested the pH of different household substances like lemon juice, soap solution, and distilled water using pH paper.
1. Lemon juice shows pH:
Answer: C
Lemon juice contains citric acid, so it is acidic (pH less than 7).
Lemon juice contains citric acid, so it is acidic (pH less than 7).
2. Soap solution is:
Answer: C
Soap is alkaline and turns red litmus blue.
Soap is alkaline and turns red litmus blue.
3. Distilled water pH is:
Answer: B
Pure water is neutral.
Pure water is neutral.
4. Acidic substances produce:
Answer: B
Acids ionize releasing hydrogen ions.
Acids ionize releasing hydrogen ions.
5. pH scale range:
Answer: B
Standard pH scale ranges from 0 to 14.
Standard pH scale ranges from 0 to 14.
Case Study 2: A farmer uses fertilizers and observes increased plant growth but soil fertility declines over time.
6. Excess fertilizers cause:
Answer: B
Overuse harms microbes and soil structure.
Overuse harms microbes and soil structure.
7. Eco-friendly alternative:
Answer: B
Organic manure improves soil fertility sustainably.
Organic manure improves soil fertility sustainably.
8. Fertilizers mainly supply:
Answer: A
Nitrogen, phosphorus, potassium.
Nitrogen, phosphorus, potassium.
9. Long use reduces:
Answer: B
Beneficial soil microbes decline.
Beneficial soil microbes decline.
10. Sustainable practice:
Answer: A
Maintains soil nutrients.
Maintains soil nutrients.
Case Study 3: A ray of light passes from air to glass and bends towards the normal.
11. This phenomenon:
Answer: B – Change in medium bends light.
12. Speed in glass is:
Less than in air.
13. Refractive index depends on:
Optical density.
14. Bending towards normal means:
Denser medium.
15. Unit of refractive index:
No unit.
Case Study 4: During exercise, breathing and heartbeat increase.
16. Reason:
Higher energy demand.
17. Gas needed more:
Oxygen.
18. Respiration releases:
Energy (ATP).
19. CO₂ level:
Increases.
20. System involved:
Respiratory & circulatory systems.