#.MOST IMPORTANT 50 MCQS IN SCIENCE CLASS 10th FOR BOARD EXAM 2024 :
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
(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
Q2. 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
Q3. Posture and balance of the body is controlled by :
(a) Cerebellum
(b) Medulla oblongata
(c) Pons
(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
(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
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
(c) (iv) 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.
(c) To improve its quality.
(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
(c) Mixed autotrophs
(d) Autotrophs
Ans. (a) Saprotrophs
Q8. Which conducting tissue is responsible for multidirectional transport in plants ?
(a) Guard Cell
(b) Xylem
(c) Phloem
(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
(c) 120 mm Hg/ 120 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
(c) Mercury
(d) Carbon
Ans. (b) Bromine
Q11. What is the main function of the cerebrum ?
(a) Thinking
(b) Hearing
(c) Memory
(d) Balancing
Ans. (a) Thinking
Q12. The highest coordinating center in the human body is :
(a) Kidney
(b) Heart
(c) Brain
(d) Spinal cord
Ans. (c) Brain
Q13. The longest fiber on the cell body of a neuron is called :
(a) Axon
(b) Sheath
(c) Cytoplasm
(d) Dendrites
Ans. (a) Axon
Q14. Which of the following diseases is not sexually transmitted ?
(a) Syphilis
(b) Gonorrhea
(c) HIV-AIDS
(d) Hepatitis
Ans. (d) Hepatitis
Q15. 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
Q16. 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
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
(c) Red
(d) Orange
Ans. (b) Blue
Q18. Which of the following is a biodegradable waste ?
(a) Aluminum can
(b) DDT
(c) Plastic bag
(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
(c) Pollution
(d) Accumulation
Ans. (a) Biomagnification
Q20. 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
Q21. 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
Q22. In which medium does light have the maximum velocity ?
(a) Glass
(b) Diamond
(c) Vacuum
(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
(c) Change in voice
(d) None of the above
Ans. (b) Menstruation
Q24. The device used for producing electric current is called a :
(a) Motor.
(b) Galvanometer.
(c) Ammeter.
(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.
(c) Right hand thumb rule.
(d) Fleming’s left-hand rule.
Ans. (d) Fleming’s left-hand rule.
Q26. What is the nature of nutrition in fungi ?
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