CBSE Class 10th Science Exam 2024 : Top 50+ MCQs with Answers for Last Minute Revision

As the CBSE Class 10 exams are in full swing, it’s time to gear up for the Science Paper scheduled on 2nd March 2024. With only a few hours left, efficient revision becomes crucial.

In this article, we have provided Top 50 Multiple Choice Questions (MCQs) in Science for CBSE Class 10 students. These questions are designed according to the latest CBSE Class 10 Science syllabus for 2023-2024, previous year question papers and sample papers. By practicing these MCQs, students can evaluate their preparation level and develop an efficient time management strategy for the final exam day.

We don’t want you to waste any time searching, so these important MCQs are available.

CBSE Class 10 Science Top 50 MCQs with Answers

Q1. 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

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

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

Q2. What type of chemical reactions take place when electricity is passed through water ?

(a) Decomposition

(b) Combination

(d) Double displacement

Ans. (a) Decomposition

Q3. Posture and balance of the body is controlled by :

(a) Cerebellum

(b) Medulla oblongata

(d) Cerebrum

Ans. (a) Cerebellum

Q4. 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

(d) Remove the moisture from the ribbon surface.

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

Q5. 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

(d) (ii) and (iv)

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

Q6. 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.

(d) To make paneer.

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

Q7. What is the nature of nutrition in fungi ?

(a) Saprotrophs

(b) Parasite

(d) Autotrophs

Ans. (a) Saprotrophs

Q8. Which conducting tissue is responsible for multidirectional transport in plants ?

(a) Guard Cell

(b) Xylem

(d) Parenchyma

And. (c) Phloem

Q9. What is the normal systolic and diastolic pressure in humans –

(a) 80 mm Hg/ 120 mm Hg

(b) 80 mm Hg/ 80 mm Hg

(d) 120 mm Hg / 80 mm Hg

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

Q10. Which of the following non-metal is liquid at room temperature ?

(a) Phosphorous

(b) Bromine

(d) Carbon

Ans. (b) Bromine

Q11. What is the main function of the cerebrum ?

(a) Thinking

(b) Hearing

(d) Balancing

Ans. (a) Thinking

Q12. The highest coordinating center in the human body is :

(a) Kidney

(b) Heart

(d) Spinal cord

Ans. (c) Brain

Q13. The longest fiber on the cell body of a neuron is called :

(a) Axon

(b) Sheath

(d) Dendrites

Ans. (a) Axon

Q14. Which of the following diseases is not sexually transmitted ?

(a) Syphilis

(b) Gonorrhea

(d) Hepatitis

Ans. (d) Hepatitis

Q15. The blue appearance of the sky is due to :

(a) Atmospheric refraction

(b) Scattering of light

(d) None of these

Ans. (b) Scattering of light

Q16. The phenomenon of light scattering by colloidal particles is known as :

(a) Dispersion

(b) Tyndall effect

(d) Internal reflection

Ans. (b) Tyndall effect

Q17. 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

(d) Orange

Ans. (b) Blue

Q18. Which of the following is a biodegradable waste ?

(a) Aluminum can

(b) DDT

(d) Cow dung

Ans. (d) Cow dung

Q19. 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

(d) Accumulation

Ans. (a) Biomagnification

Q20. What term is used to refer to the genetic makeup of an individual organism ?

(a) Allele

(b) Homozygous

(d) Phenotype

Ans. (c) Genotype

Q21. What should be the core of an electromagnet ?

(a) Hard iron

(b) Soft iron

(d) None of above

Ans.(b) Soft iron

Q22. In which medium does light have the maximum velocity ?

(a) Glass

(b) Diamond

(d) Water

Ans. (c) Vacuum

Q23. In human females, an event that indicates the onset of reproductive phase is :

(a) Growth of the body

(b) Menstruation

(d) None of the above

Ans. (b) Menstruation

Q24. The device used for producing electric current is called a :

(a) Motor.

(b) Galvanometer.

(a) Generator.

Ans. (d) Generator.

Q25. 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.

(d) Fleming’s left-hand rule.

Ans. (d) Fleming’s left-hand rule.

Q26. What is the nature of nutrition in fungi ?

(a) Saprotrophs

(b) Parasite

(d) Autotrophs

Ans. (a) Saprotrophs

Q27. A plant gets rid of excess water through transpiration. Which is a method used by plants to get rid of solid waste products ?

(a) Shortening of stem

(b) Shedding of yellow leaves

(d) Expansion of roots into the soil

Ans. (b) Shedding of yellow leaves

Q28. Which plant hormone promotes cell division ?

(a) Auxin

(b) Cytokinin

(d) Gibberellin

Ans. (b) Cytokinin

Q29. The longest fiber on the cell body of a neuron is called :

(a) Axon

(b) Sheath

(d) Dendrites

Ans. (a) Axon

Q30. The highest co-ordinating center in the human body is :

(a) Kidney

(b) Heart

(d) Spinal cord

Ans. (c) Brain

Q31. Which of the following acts as both endocrine and exocrine gland ?

(a) Adrenal

(b) Thyroid

(d) Pancreas

Ans. (d) Pancreas

Q32. The part of a seed which grows and develops into root on germination is :

(a) Cotyledon

(b) Radicle

(d) Plumule

Ans. (b) Radicle

Q33. Posture and balance of the body is controlled by :

(a) Cerebellum

(b) Medulla oblongata

(d) Cerebrum

Ans. (a) Cerebellum

Q34. Which of the following diseases is not sexually transmitted ?

(a) Syphilis

(b) Gonorrhea

(d) Hepatitis

Ans. (d) Hepatitis

Q35. The device used for producing electric current is called a :

(a) Motor.

(b) Galvanometer.

(d) Generator.

Ans. (d) Generator.

Q36. In human females, an event that indicates the onset of reproductive phase is :

(a) Growth of the body

(b) Menstruation

(d) None of the above

Ans. (b) Menstruation

Q37. 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.

(d) Fleming’s left-hand rule.

Ans. (d) Fleming’s left-hand rule.

Q38. What should be the core of an electromagnet ?

(a) Hard iron

(b) Soft iron

(d) None of above

Ans.(b) Soft iron

Q39. Which part of the DNA provides information for a protein ?

(a) Gene

(b) Mitochondria

(d) Chromosome

Ans. (a) Gene

Q40. What term is used to refer to the genetic makeup of an individual organism ?

(a) Allele

(b) Homozygous

(d) Phenotype

Ans. (c) Genotype

Q41. Regardless of your distance from a mirror, the reflected image appears upright. The mirror is most likely to be :

(a) Plane

(b) Concave

(d) Either plane or convex

Ans. (b) Concave

Q42. In which medium does light have the maximum velocity ?

(a) Glass

(b) Diamond

(d) Water

Ans. (c) Vacuum

Q43. If a normal human body cell has 46 pairs of chromosomes, what is the probable number of chromosomes in a human sex cell ?

(a) 22

(b) 23

(d) 40

Ans. (b) 23

Q44. The blue appearance of the sky is due to :

(a) Atmospheric refraction

(b) Scattering of light

(d) None of these

Ans. (b) Scattering of light

Q45. The phenomenon of light scattering by colloidal particles is known as :

(a) Dispersion

(b) Tyndall effect

(d) Internal reflection

Ans. (b) Tyndall effect

Q46. When electric current is passed, electrons move from :

(a) High potential to low potential.

(b) Low potential to high potential.

(d) Against the direction of the current.

Ans. (c) In the direction of the current.

Q47. The electrical resistivity of a given metallic wire depends on :

(a) Its shape

(b) Its thickness

(d) Its length

Ans. (c) The nature of the material

Q48. Sunlight is passed through a transparent medium having very fine particles, These particles scatter light. Which among the given components of light under goes more scattering ?