CBSE Class 10 Science & Mathematics
Comprehensive Practice Examination (2026
Edition) | Latest 2026 Syllabus | High-
Difficulty Practice Questions | Complete
Answer Key with Detailed Solutions |
Comprehensive Exam Preparation
Date: 16-07-2026
Duration: 3 Hours
Maximum Marks: 100
Instructions
Answer all questions.
Read each question carefully before answering.
Use scientific calculators only where permitted.
Show all necessary steps in Mathematics.
Draw neat, labeled diagrams wherever required.
This paper follows the latest CBSE Class 10 competency-
based assessment pattern, including application, analytical,
case-based, and assertion–reason questions.
Section A – Science (50 Marks)
1.
Which of the following is an oxidation reaction?
A. CuO + H₂ → Cu + H₂O
,B. Zn + CuSO₄ → ZnSO₄ + Cu
C. 2Mg + O₂ → 2MgO
D. AgNO₃ + NaCl → AgCl + NaNO₃
Answer: C
Rationale: Magnesium gains oxygen, which is oxidation.
2.
The functional unit of the kidney is:
A. Neuron
B. Alveolus
C. Nephron
D. Glomerulus
Answer: C
Rationale: The nephron filters blood and forms urine.
3.
The SI unit of electric power is:
A. Joule
B. Volt
,C. Watt
D. Ampere
Answer: C
Rationale: Power is measured in watts (W).
4.
Which lens is used to correct myopia?
A. Convex lens
B. Concave lens
C. Cylindrical lens
D. Bifocal lens
Answer: B
Rationale: A concave lens diverges incoming light before it
reaches the eye.
5.
The process by which green plants prepare food is:
A. Respiration
B. Digestion
, C. Photosynthesis
D. Transpiration
Answer: C
Rationale: Photosynthesis converts carbon dioxide and water
into glucose using sunlight.
6.
Which gas is evolved when zinc reacts with dilute hydrochloric
acid?
A. Oxygen
B. Hydrogen
C. Chlorine
D. Carbon dioxide
Answer: B
Rationale: Zn + 2HCl → ZnCl₂ + H₂.
7.
The genetic material in human cells is:
A. RNA
Comprehensive Practice Examination (2026
Edition) | Latest 2026 Syllabus | High-
Difficulty Practice Questions | Complete
Answer Key with Detailed Solutions |
Comprehensive Exam Preparation
Date: 16-07-2026
Duration: 3 Hours
Maximum Marks: 100
Instructions
Answer all questions.
Read each question carefully before answering.
Use scientific calculators only where permitted.
Show all necessary steps in Mathematics.
Draw neat, labeled diagrams wherever required.
This paper follows the latest CBSE Class 10 competency-
based assessment pattern, including application, analytical,
case-based, and assertion–reason questions.
Section A – Science (50 Marks)
1.
Which of the following is an oxidation reaction?
A. CuO + H₂ → Cu + H₂O
,B. Zn + CuSO₄ → ZnSO₄ + Cu
C. 2Mg + O₂ → 2MgO
D. AgNO₃ + NaCl → AgCl + NaNO₃
Answer: C
Rationale: Magnesium gains oxygen, which is oxidation.
2.
The functional unit of the kidney is:
A. Neuron
B. Alveolus
C. Nephron
D. Glomerulus
Answer: C
Rationale: The nephron filters blood and forms urine.
3.
The SI unit of electric power is:
A. Joule
B. Volt
,C. Watt
D. Ampere
Answer: C
Rationale: Power is measured in watts (W).
4.
Which lens is used to correct myopia?
A. Convex lens
B. Concave lens
C. Cylindrical lens
D. Bifocal lens
Answer: B
Rationale: A concave lens diverges incoming light before it
reaches the eye.
5.
The process by which green plants prepare food is:
A. Respiration
B. Digestion
, C. Photosynthesis
D. Transpiration
Answer: C
Rationale: Photosynthesis converts carbon dioxide and water
into glucose using sunlight.
6.
Which gas is evolved when zinc reacts with dilute hydrochloric
acid?
A. Oxygen
B. Hydrogen
C. Chlorine
D. Carbon dioxide
Answer: B
Rationale: Zn + 2HCl → ZnCl₂ + H₂.
7.
The genetic material in human cells is:
A. RNA
