Top 50+ CBSE Class 10 Science MCQs for Board Exam 2024 with Answers to Secure Good Marks, Download PDF Here

CBSE Board Class 10 Science MCQs (With Answers) 2024: The CBSE Class 10 Science Board Exam 2023–24 is scheduled to be conducted on March 2, 2024. As less than a month is left until the final exam, it is crucial for students to practice a good number of science questions to assess their level of preparation.

In this article, we have provided the top 50 multiple-choice questions (MCQs) in science for CBSE Class 10 students. These questions are created in accordance with the most recent CBSE Class 10 Science syllabus for 2023–2024, previous year question papers, and sample papers. Through practicing these MCQs, students can evaluate their level of preparation and develop an efficient time management strategy for the final exam day.

CBSE Class 10 Science Paper: Key Highlights

CBSE Class 10 Science Paper Pattern 2024

CBSE Class 10 Exam 2024 will be of total 100 marks out of which the theory paper will be for 80 marks, while the internal assessments will account for the remaining 20 marks. As per the latest CBSE Class 10 Exam Pattern 2023-24, the structure of the Science question paper will be as follows:

Also Read: CBSE Class 10 Science Exam Pattern 2024 with Marking Scheme, Question Paper Blue Print

CBSE Class 10 Science Top 50 MCQs 

Q.1. Which option correctly shows the transport of oxygen to the cell?

(a) Lungs →pulmonary artery →right atrium → right ventricle→ vena cava → body cells

(b) Lungs →pulmonary vein →right atrium →right ventricle → aorta → body cells

(c) Lungs →pulmonary artery →left atrium → left ventricle → vena cava → body cells

(d) Lungs →pulmonary vein →left atrium →left ventricle →aorta → body cells

Ans. (d) Lungs →pulmonary vein →left atrium →left ventricle →aorta → body cells

Q.2. What type of chemical reactions take place when electricity is passed through water?

(a) Decomposition

(b) Combination

(c) Displacement 

(d) Double displacement

Ans. (a) Decomposition

Q.3. Posture and balance of the body is controlled by:

(a) Cerebellum

(b) Medulla oblongata

(c) Pons

(d) Cerebrum

Ans. (a) Cerebellum

Q.4. Before burning in air, the magnesium ribbon is cleaned by rubbing with a sand paper to:

(a) Make the ribbon surface shinier

(b) Remove the layer of magnesium oxide from the ribbon surface

(c) Remove the dust from the ribbon surface

(d) Remove the moisture from the ribbon surface.

Ans. (b) Remove the layer of magnesium oxide from the ribbon surface

Q.5. Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of the reaction involved?

(i) Displacement reaction

(ii) Precipitation reaction

(iii) Combination reaction

(iv) Double displacement reaction

(a) (i) only

(b) (ii) only

(c) (iv) only

(d) (ii) and (iv)

Ans. (d) (ii) and (iv)

Q.6. A milkman adds a very small amount of baking soda to fresh milk. Why?

(a) To increase the rate of fermentation.

(b) To decrease the rate of fermentation.

(c) To improve its quality.

(d) To make paneer.

Ans. (b) To decrease the rate of fermentation.

Q.7. What is the nature of nutrition in fungi? 

(a) Saprotrophs

(b) Parasite

(c) Mixed autotrophs

(d) Autotrophs

Ans. (a) Saprotrophs

Q.8. Which conducting tissue is responsible for multidirectional transport in plants?

(a) Guard Cell

(b) Xylem

(c) Phloem

(d) Parenchyma

And. (c) Phloem

Q.9. What is the normal systolic and diastolic pressure in humans-

(a)80 mm Hg/ 120 mm Hg

(b) 80 mm Hg/ 80 mm Hg

(c) 120 mm Hg/ 120 mm Hg

(d) 120 mm Hg / 80 mm Hg

Ans: (d) 120 mm Hg / 80 mm Hg

Q.10. Which of the following non-metal is liquid at room temperature?

(a) Phosphorous

(b) Bromine

(c) Mercury

(d) Carbon

Ans. (b) Bromine

Q.11. What is the main function of the cerebrum?

(a) Thinking

(b) Hearing

(c) Memory

(d) Balancing

Ans. (a) Thinking

Q.12. The highest coordinating center in the human body is:

(a) Kidney 

(b) Heart

(c) Brain

(d) Spinal cord

Ans. (c) Brain

Q.13. The longest fiber on the cell body of a neuron is called:

(a) Axon

(b) Sheath

(c) Cytoplasm

(d) Dendrites

Ans. (a) Axon

Q.14. Which of the following diseases is not sexually transmitted?

(a) Syphilis 

(b) Gonorrhea

(c) HIV-AIDS 

(d) Hepatitis 

Ans. (d) Hepatitis 

Q.15. The blue appearance of the sky is due to:

(a) Atmospheric refraction

(b) Scattering of light

(c) Presence of plants in water 

(d) None of these

Ans. (b) Scattering of light

Q.16. The phenomenon of light scattering by colloidal particles is known as:

(a) Dispersion 

(b) Tyndall effect

(c) Atmospheric refraction

(d) Internal reflection

Ans. (b) Tyndall effect

Q.17. Sunlight is passed through a transparent medium having very fine particles These particles scatter light. Which among the given components of light undergoes more scattering?
(a) Yellow  
(b) Blue
(c) Red
(d) Orange 
Ans. (b) Blue

Q.18. Which of the following is a biodegradable waste ?
(a) Aluminum can
(b) DDT 
(c) Plastic bag 
(d) Cow dung
Ans. (d) Cow dung

Q.19. The process in which non-biodegradable pesticides accumulate in increasing amounts at each higher trophic level within the food chain is referred to as:
(a) Biomagnification
(b) Eutrophication
(c) Pollution
(d) Accumulation
Ans. (a) Biomagnification

Q.20. What term is used to refer to the genetic makeup of an individual organism?

(a) Allele 

(b) Homozygous

(c) Genotype

(d) Phenotype

Ans. (c) Genotype

Q.21. What should be the core of an electromagnet?

(a) Hard iron 

(b) Soft iron 

(c) Rusted iron 

(d) None of above

Ans.(b) Soft iron

Q.22. In which medium does light have the maximum velocity?

(a) Glass

(b) Diamond

(c) Vacuum

(d) Water 

Ans. (c) Vacuum

Q.23.  In human females, an event that indicates the onset of reproductive phase is:

(a) Growth of the body 

(b) Menstruation 

(c) Change in voice 

(d) None of the above

Ans. (b) Menstruation

Q.24. The device used for producing electric current is called a: 

(a) Motor.

(b) Galvanometer.

(c) Ammeter. 

(a) Generator.

Ans. (d) Generator.

Q.25. The direction of force on a current carrying conductor in a magnetic field is given by: 

(a) Left hand thumb rule. 

(b) Fleming’s right-hand rule.

(c) Right hand thumb rule. 

(d) Fleming’s left-hand rule.

Ans. (d) Fleming’s left-hand rule.

View and download the PDF of CBSE Class 10 Science Top 50 MCQs 

Important Study Resources for CBSE Class 10 Science Exam 2024

Here, we have provided links to some important study material for the science board exam in 2024. Students can view and download the PDFs using the links given below. 

Students appearing for the CBSE Class 10 Science exam can also solve previous year question paper and latest sample papers to overcome the exam fear and boost their confidence. 

Also check: CBSE Date Sheet 2024 Class 10 PDF Download