CBSE Class 10 Comprehensive Practice
Examination (2026 Edition) | Science,
Mathematics, English, Social Science &
Information Technology | Latest 2026 Syllabus
| High-Difficulty Practice Questions with
Detailed Solutions | Complete Exam
Preparation
Latest Syllabus-Based Practice Examination | High-Difficulty
Multiple-Choice Questions | Verified Answers with Detailed
Rationales
Examination Date: 16-07-2026
Instructions
Time: 3 Hours
Total Questions: 50
All questions are Multiple Choice Questions (MCQs).
Choose the one best answer.
Each question carries 1 mark.
Answers are provided after each question with a detailed
rationale for learning purposes.
,Question 1
Which of the following correctly represents the balanced
chemical equation for the burning of magnesium in oxygen?
A. Mg + O → MgO₂
B. 2Mg + O₂ → 2MgO
C. Mg + O₂ → MgO
D. Mg₂ + O₂ → Mg₂O
Answer: B
Rationale: Magnesium reacts with oxygen to form magnesium
oxide. The balanced equation is 2Mg + O₂ → 2MgO.
Question 2
Which process is responsible for the transport of water in
plants?
A. Photosynthesis
B. Transpiration pull
C. Respiration
D. Germination
Answer: B
, Rationale: Water moves upward mainly because of
transpiration pull created by evaporation from leaf surfaces.
Question 3
The SI unit of electric power is:
A. Joule
B. Watt
C. Volt
D. Ampere
Answer: B
Rationale: Power is measured in watts (W), where 1 watt = 1
joule per second.
Question 4
Which mirror is commonly used in vehicle rear-view mirrors?
A. Convex mirror
B. Concave mirror
C. Plane mirror
D. Cylindrical mirror
Examination (2026 Edition) | Science,
Mathematics, English, Social Science &
Information Technology | Latest 2026 Syllabus
| High-Difficulty Practice Questions with
Detailed Solutions | Complete Exam
Preparation
Latest Syllabus-Based Practice Examination | High-Difficulty
Multiple-Choice Questions | Verified Answers with Detailed
Rationales
Examination Date: 16-07-2026
Instructions
Time: 3 Hours
Total Questions: 50
All questions are Multiple Choice Questions (MCQs).
Choose the one best answer.
Each question carries 1 mark.
Answers are provided after each question with a detailed
rationale for learning purposes.
,Question 1
Which of the following correctly represents the balanced
chemical equation for the burning of magnesium in oxygen?
A. Mg + O → MgO₂
B. 2Mg + O₂ → 2MgO
C. Mg + O₂ → MgO
D. Mg₂ + O₂ → Mg₂O
Answer: B
Rationale: Magnesium reacts with oxygen to form magnesium
oxide. The balanced equation is 2Mg + O₂ → 2MgO.
Question 2
Which process is responsible for the transport of water in
plants?
A. Photosynthesis
B. Transpiration pull
C. Respiration
D. Germination
Answer: B
, Rationale: Water moves upward mainly because of
transpiration pull created by evaporation from leaf surfaces.
Question 3
The SI unit of electric power is:
A. Joule
B. Watt
C. Volt
D. Ampere
Answer: B
Rationale: Power is measured in watts (W), where 1 watt = 1
joule per second.
Question 4
Which mirror is commonly used in vehicle rear-view mirrors?
A. Convex mirror
B. Concave mirror
C. Plane mirror
D. Cylindrical mirror
