Class 10 Science Chapter-wise MCQs with Answers

Class 10 Science Chapter-wise MCQs with Answers – All Chapters CBSE (2025)

Title: Class 10 Science Chapter-wise MCQs with Answers – All Chapters CBSE (2025) | COTINEW

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Download chapter-wise Class 10 Science MCQs with answers (2025) based on the latest CBSE syllabus. Practice Physics, Chemistry & Biology questions to boost your exam prep. Free PDF by COTINEW.

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Get ready for your CBSE Class 10 Board Exams with COTINEW's comprehensive collection of Science MCQs (2025). This resource offers chapter-wise multiple-choice questions (MCQs) for Physics, Chemistry, and Biology, strictly based on the latest NCERT syllabus and CBSE guidelines.

Whether you're revising or testing your concept clarity, these Class 10 Science MCQs with detailed answers will help you practice efficiently and score higher. Suitable for school tests, board exams, and Olympiad preparation.

📘 Chapter-wise Class 10 Science MCQs with Answers (2025)

🧪 Chapter 1: Chemical Reactions and Equations

Which of the following is a displacement reaction?
A) NaOH + HCl → NaCl + H₂O
B) Zn + H₂SO₄ → ZnSO₄ + H₂
C) BaCl₂ + Na₂SO₄ → BaSO₄ + 2NaCl
D) C + O₂ → CO₂
Answer: B
A substance 'X' is used in whitewashing and reacts with water to form 'Y'. 'Y' gives a hard coating on walls. Identify 'X'.
A) Ca(OH)₂
B) CaO
C) CaCO₃
D) CaSO₄
Answer: B

🌡 Chapter 2: Acids, Bases and Salts

The pH of a basic solution is:
A) Less than 7
B) Equal to 7
C) More than 7
D) Zero
Answer: C
Which of the following is a natural indicator?
A) Phenolphthalein
B) Methyl orange
C) Turmeric
D) Litmus
Answer: C

🔩 Chapter 3: Metals and Non-Metals

Which metal is liquid at room temperature?
A) Zinc
B) Mercury
C) Copper
D) Sodium
Answer: B
The metal which does not react with dilute HCl is:
A) Zn
B) Cu
C) Mg
D) Fe
Answer: B

💠 Chapter 4: Carbon and Its Compounds

The molecular formula of ethyne is:
A) C₂H₄
B) C₂H₂
C) CH₄
D) C₃H₆
Answer: B
Which of the following is a saturated hydrocarbon?
A) Ethane
B) Ethene
C) Ethyne
D) Benzene
Answer: A

📊 Chapter 5: Periodic Classification of Elements

Who proposed the Modern Periodic Table?
A) Mendeleev
B) Newlands
C) Dobereiner
D) Moseley
Answer: D
Elements in the same group have the same:
A) Atomic number
B) Valency
C) Atomic mass
D) Period number
Answer: B

🌱 Chapter 6: Life Processes

11. Which of the following is a product of anaerobic respiration in muscles?
A) Lactic acid
B) Ethanol
C) Oxygen
D) Carbon dioxide
Answer: A

12. The basic unit of excretion in human kidneys is:
A) Alveoli
B) Nephron
C) Villi
D) Ureter
Answer: B

13. Which part of the plant helps in the transport of water?
A) Phloem
B) Xylem
C) Cortex
D) Cambium
Answer: B

14. In human beings, the site of complete digestion is:
A) Stomach
B) Mouth
C) Small intestine
D) Large intestine
Answer: C

15. Blood vessels that carry blood away from the heart are:
A) Arteries
B) Veins
C) Capillaries
D) Lymph
Answer: A

🧠 Chapter 7: Control and Coordination

16. The hormone responsible for maintaining sugar level in blood is:
A) Insulin
B) Thyroxine
C) Adrenaline
D) Estrogen
Answer: A

17. The largest part of the human brain is:
A) Cerebrum
B) Cerebellum
C) Medulla
D) Thalamus
Answer: A

18. Tropic movements in plants are caused by:
A) Water
B) Hormones
C) Sunlight
D) Minerals
Answer: B

19. Which part of the brain controls balance and posture?
A) Medulla
B) Cerebrum
C) Cerebellum
D) Pons
Answer: C

20. The response of a plant to light is called:
A) Hydrotropism
B) Phototropism
C) Geotropism
D) Chemotropism
Answer: B

🌿 Chapter 8: How Do Organisms Reproduce?

21. The mode of reproduction in Amoeba is:
A) Budding
B) Binary fission
C) Fragmentation
D) Spore formation
Answer: B

22. Pollination is the transfer of pollen from:
A) Anther to ovule
B) Stigma to ovary
C) Anther to stigma
D) Ovule to anther
Answer: C

23. Which of the following is a unisexual flower?
A) Mustard
B) Hibiscus
C) Watermelon
D) Rose
Answer: C

24. Testes are located outside the body in a sac called:
A) Scrotum
B) Urethra
C) Penis
D) Vas deferens
Answer: A

25. Which method of contraception is permanent?
A) Condom
B) IUD
C) Oral pill
D) Surgical method
Answer: D

🧬 Chapter 9: Heredity and Evolution

26. The unit of heredity is:
A) Chromosome
B) Gene
C) DNA
D) RNA
Answer: B

27. Sex of a child in humans is determined by:
A) Father’s chromosome
B) Mother’s chromosome
C) X chromosome
D) Environment
Answer: A

28. Mendel’s law of segregation is based on:
A) Hybrid variety
B) Dominant traits
C) Monohybrid cross
D) Genetic mutation
Answer: C

29. The number of chromosomes in human gametes is:
A) 46
B) 23
C) 44
D) 22
Answer: B

30. Wings of bat and wings of bird are:
A) Homologous organs
B) Analogous organs
C) Vestigial organs
D) Identical
Answer: B

🔍 Chapter 10: Light – Reflection and Refraction

31. The focal length of a plane mirror is:
A) 0
B) ∞
C) 1
D) –1
Answer: B

32. A concave mirror forms a virtual image when the object is placed:
A) At infinity
B) Beyond C
C) At F
D) Between pole and focus
Answer: D

33. The mirror used by dentists is:
A) Convex
B) Plane
C) Concave
D) None
Answer: C

34. When light passes from air to glass, it:
A) Speeds up
B) Slows down
C) Remains same
D) Bends away
Answer: B

35. The power of a lens is given in:
A) Metre
B) Centimetre
C) Dioptre
D) Watt
Answer: C

👁 Chapter 11: Human Eye and the Colourful World

36. The part of the eye that controls the size of the pupil is:
A) Iris
B) Retina
C) Lens
D) Cornea
Answer: A

37. The defect of vision in which distant objects are clear but nearby objects appear blurred is:
A) Hypermetropia
B) Myopia
C) Astigmatism
D) Cataract
Answer: A

38. Rainbow is formed due to:
A) Dispersion
B) Total internal reflection
C) Refraction
D) All of these
Answer: D

39. The splitting of white light into different colours is called:
A) Dispersion
B) Scattering
C) Reflection
D) Refraction
Answer: A

40. Atmospheric refraction is responsible for:
A) Rainbow
B) Twinkling of stars
C) Formation of mirage
D) None
Answer: B

⚡ Chapter 12: Electricity

41. The SI unit of resistance is:
A) Ampere
B) Volt
C) Ohm
D) Watt
Answer: C

42. Ohm’s law is V =
A) I/R
B) IR
C) R/I
D) P/I
Answer: B

43. The device used to measure current is:
A) Voltmeter
B) Ammeter
C) Galvanometer
D) Multimeter
Answer: B

44. A fuse wire should have:
A) Low melting point
B) High resistance
C) High melting point
D) Both A and B
Answer: D

45. The commercial unit of electrical energy is:
A) Watt
B) Kilowatt
C) Kilowatt-hour
D) Joule
Answer: C

🧲 Chapter 13: Magnetic Effects of Electric Current

46. The magnetic field around a current-carrying conductor is:
A) Straight
B) Circular
C) Elliptical
D) Irregular
Answer: B

47. The right-hand thumb rule is used to find:
A) Direction of electric current
B) Direction of magnetic field
C) Voltage
D) Force
Answer: B

48. In a solenoid, magnetic field lines are:
A) Circular
B) Elliptical
C) Straight and parallel
D) Irregular
Answer: C

49. An electric motor converts:
A) Electrical energy to mechanical energy
B) Mechanical to electrical
C) Heat to electricity
D) Magnetic to chemical
Answer: A

50. The device that converts mechanical energy into electrical energy is:
A) Electric bulb
B) Electric generator
C) Electric motor
D) Transformer
Answer: B

🔋 Chapter 14: Sources of Energy

51. The main fuel for nuclear power plants is:
A) Coal
B) Uranium
C) Petrol
D) Natural gas
Answer: B

52. Which is not a renewable source of energy?
A) Wind
B) Sun
C) Coal
D) Tides
Answer: C

53. Biogas is formed by the action of:
A) Aerobic bacteria
B) Anaerobic bacteria
C) Algae
D) Fungi
Answer: B

54. A good source of energy is one which:
A) Produces smoke
B) Is expensive
C) Is easily available
D) Has low calorific value
Answer: C

55. Wind energy is harnessed using:
A) Solar panels
B) Wind mills
C) Generators
D) Heat engines
Answer: B

🌍 Chapter 15: Our Environment

56. Ozone is present in the:
A) Troposphere
B) Stratosphere
C) Mesosphere
D) Ionosphere
Answer: B

57. Which of the following is a decomposer?
A) Bacteria
B) Lion
C) Deer
D) Plant
Answer: A

58. The main cause of ozone depletion is:
A) CO₂
B) SO₂
C) CFCs
D) CH₄
Answer: C

59. Energy flow in an ecosystem is:
A) Cyclic
B) Linear
C) Random
D) Backward
Answer: B

60. Non-biodegradable waste is:
A) Vegetable peels
B) Paper
C) Plastic
D) Cotton
Answer: C

🌱 Chapter 16: Sustainable Management of Natural Resources

61. Which of the following is not a 3R principle?
A) Reduce
B) Reuse
C) Recycle
D) Reform
Answer: D

62. Forests are conserved using:
A) Chipko movement
B) Greenhouse
C) Urbanization
D) Nuclear energy
Answer: A

63. Which river is the Ganga Action Plan associated with?
A) Yamuna
B) Ganga
C) Krishna
D) Brahmaputra
Answer: B

64. Which of these is an exhaustible natural resource?
A) Solar energy
B) Coal
C) Wind
D) Water
Answer: B

65. Watershed management is related to:
A) Forest development
B) Soil conservation
C) Water conservation
D) Mining
Answer: C

🌍 Chapter 15: Our Environment (Contd.)

66. Which of the following organisms form the first trophic level in a food chain?
A) Carnivores
B) Producers
C) Herbivores
D) Decomposers
Answer: B

67. The percentage of solar energy trapped by green plants is about:
A) 0.1%
B) 10%
C) 1%
D) 100%
Answer: C

68. Which of these is an example of a biodegradable substance?
A) Polythene
B) Aluminium foil
C) Vegetable peels
D) Plastic
Answer: C

69. Which gas is primarily responsible for causing global warming?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Hydrogen
Answer: B

70. Which of the following is not part of a natural ecosystem?
A) Aquarium
B) Forest
C) Pond
D) Desert
Answer: A

🌱 Chapter 16: Sustainable Management of Natural Resources (Contd.)

71. Which one is the best method to manage solid waste?
A) Segregation at source
B) Dumping in rivers
C) Open burning
D) Chemical spraying
Answer: A

72. The aim of sustainable development is to:
A) Use more natural resources
B) Increase industrial output
C) Meet present needs without compromising future
D) Maximize urbanization
Answer: C

73. Which of the following is a renewable resource?
A) Petrol
B) Solar energy
C) Coal
D) Diesel
Answer: B

74. Select the odd one out based on exhaustibility:
A) Forest
B) Wind energy
C) Petroleum
D) Solar energy
Answer: C

75. Water harvesting is a method of:
A) Collecting and storing rainwater
B) Flood control
C) Cloud seeding
D) Increasing evaporation
Answer: A

🔄 Integrated Environment & Conservation MCQs

76. The 5 Rs of waste management do not include:
A) Refuse
B) Reduce
C) Recycle
D) Rearrange
Answer: D

77. One of the following is a direct consequence of deforestation:
A) Increase in biodiversity
B) Soil erosion
C) Global cooling
D) Oxygen increase
Answer: B

78. Which of these methods conserves biodiversity?
A) Deforestation
B) Industrialization
C) Afforestation
D) Urban sprawl
Answer: C

79. Which of the following is a traditional method of water conservation in India?
A) Check dams
B) Borewells
C) Canals
D) Pipelines
Answer: A

80. The main objective of the Ganga Action Plan is:
A) Deforestation
B) Cleaning the river
C) Building dams
D) River linking
Answer: B

🌐 Environment & Ecosystem (Conceptual MCQs)

81. Energy flow in an ecosystem is always:
A) Cyclic
B) Bidirectional
C) Unidirectional
D) Reversible
Answer: C

82. Which of the following practices leads to water pollution?
A) Dumping industrial waste
B) Solar farming
C) Organic farming
D) Crop rotation
Answer: A

83. Which of the following gases damages the ozone layer?
A) CO₂
B) CFCs
C) O₂
D) H₂
Answer: B

84. The presence of which of the following in water indicates water pollution?
A) High oxygen level
B) Low CO₂ level
C) Coliform bacteria
D) Clear water
Answer: C

85. Which practice will help in resource conservation?
A) Excessive use
B) Overgrazing
C) Rainwater harvesting
D) Deforestation
Answer: C

86. Which of these can be recycled?
A) Food waste
B) Wood
C) Vegetable peel
D) Glass
Answer: D

87. The chipko movement is associated with:
A) Animal protection
B) Tree conservation
C) River cleaning
D) Renewable energy
Answer: B

88. Which of the following activities can reduce air pollution?
A) Using public transport
B) Burning leaves
C) Using diesel vehicles
D) Open incineration
Answer: A

89. Which of the following is the correct sequence in a food chain?
A) Producer → Herbivore → Carnivore
B) Herbivore → Producer → Carnivore
C) Carnivore → Herbivore → Producer
D) Producer → Carnivore → Herbivore
Answer: A

90. Which type of pollution is reduced by planting more trees?
A) Noise
B) Soil
C) Air
D) Water
Answer: C

🔁 Integrated Revision MCQs (Chapters 1–16 Mix)

91. Which reaction is represented by the following equation:
Zn + 2HCl → ZnCl₂ + H₂
A) Combination
B) Decomposition
C) Displacement
D) Double displacement
Answer: C

92. The correct formula of Plaster of Paris is:
A) CaSO₄·2H₂O
B) CaSO₄
C) CaSO₄·½H₂O
D) Ca(OH)₂
Answer: C

93. Which non-metal is a good conductor of electricity?
A) Iodine
B) Sulphur
C) Graphite
D) Phosphorus
Answer: C

94. Which functional group is present in alcohols?
A) –CHO
B) –OH
C) –COOH
D) –CO
Answer: B

95. The modern periodic table is based on:
A) Atomic mass
B) Number of neutrons
C) Atomic number
D) Valency
Answer: C

🧬 Biology Mixed Questions

96. The correct sequence of parts in the human digestive system is:
A) Mouth → Esophagus → Stomach → Small Intestine → Large Intestine
B) Mouth → Stomach → Esophagus → Large Intestine → Small Intestine
C) Mouth → Small Intestine → Esophagus → Stomach → Large Intestine
D) Mouth → Esophagus → Large Intestine → Stomach → Small Intestine
Answer: A

97. Which plant hormone is responsible for cell elongation?
A) Cytokinin
B) Auxin
C) Gibberellin
D) Ethylene
Answer: B

98. Which method of reproduction is common in yeast?
A) Binary fission
B) Fragmentation
C) Budding
D) Sporulation
Answer: C

99. In a monohybrid cross, the F₂ generation ratio is:
A) 1:1
B) 3:1
C) 2:1
D) 1:2:1
Answer: B

100. Myopia is corrected by using:
A) Convex lens
B) Concave lens
C) Cylindrical lens
D) Bifocal lens
Answer: B

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Class 10 Science Chapter-wise MCQs with Answers – All Chapters CBSE (2025)