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MCQs for CBSE Class 8 Science With Answer
By rohit.pandey1
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Updated on 12 Sep 2025, 12:34 IST
Class 8 Science MCQs are one of the best ways to practice and revise the CBSE Class 8 Science syllabus chapter-wise. On this page, you will find CBSE Class 8 Science Multiple Choice Questions with answers, detailed explanations, and free PDF downloads for every chapter. These chapter-wise Science MCQs for Class 8 are designed to cover important topics, competency-based questions, diagram-based questions, and data-based questions to help you prepare for exams effectively.
Students can attempt our free online Science quiz for Class 8 with instant scoring, solve objective questions for revision, and download printable worksheets to practice offline. Whether you are looking for important Class 8 Science questions, online tests, or chapter-wise MCQ practice papers, this collection will help you strengthen your concepts and score high in school exams.
Chapter wise MCQ & Important Questions for Class 8 Science
| Chapter Wise MCQs for Class 8 Science | |
| Chapter No. | Chapter Name |
| 1 | Crop Production and Management |
| 2 | Microorganisms: Friend and Foe |
| 3 | Synthetic Fibres and Plastics |
| 4 | Materials: Metals and Non-Metals |
| 5 | Coal and Petroleum |
| 6 | Combustion and Flame |
| 7 | Conservation of Plants and Animals |
| 8 | Cell – Structure and Functions |
| 9 | Reproduction in Animals |
| 10 | Reaching the Age of Adolescence |
| 11 | Force and Pressure |
| 12 | Friction |
| 13 | Sound |
| 14 | Chemical Effects of Electric Current |
| 15 | Some Natural Phenomena |
Download Class 8 Science MCQ PDFs (All Chapters)
Prepare effectively for exams with our chapter-wise Class 8 Science MCQ PDFs. Each PDF includes important multiple-choice questions with answers and solutions explained for quick revision. These PDFs are based on the latest NCERT & CBSE syllabus and regularly updated to match new exam patterns and competency-based questions. Students can print them as worksheets or practice them offline to strengthen your concepts before school tests and final exams.
50 Most Important Class 8 Science MCQs (Chapter-Wise)
Chapter 1: Crop Production and Management MCQs
The process of loosening and turning of soil is called:
(a) Sowing
(b) Ploughing
(c) Manuring
(d) Weeding
Answer: (b) Ploughing
Explanation: Ploughing aerates the soil and helps roots grow deeper.
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The practice of growing two or more crops together is:
(a) Crop rotation
(b) Mixed cropping
(c) Weeding
(d) Harvesting
Answer: (b) Mixed cropping
Explanation: Mixed cropping reduces risk of total crop failure.
Which implement is used for sowing seeds uniformly?
(a) Plough
(b) Seed drill
(c) Hoe
(d) Harrow
Answer: (b) Seed drill
Explanation: Seed drill ensures proper depth and spacing for seeds.
Which of these is a rabi crop?
(a) Rice
(b) Wheat
(c) Maize
(d) Bajra
Answer: (b) Wheat
Explanation: Wheat is sown in winter (rabi season).
Chapter 2: Microorganisms – Friend and Foe MCQs
Which microorganism is used in the production of antibiotics?
(a) Yeast
(b) Penicillium
(c) Rhizobium
(d) Lactobacillus
Answer: (b) Penicillium
Explanation: Penicillium produces penicillin, an antibiotic.
The microorganism responsible for causing tuberculosis is:
(a) Virus
(b) Bacteria
(c) Protozoa
(d) Fungi
Answer: (b) Bacteria
Explanation: Mycobacterium tuberculosis is a bacterium.
Which microorganism is used in nitrogen fixation in pulses?
(a) Rhizobium
(b) Yeast
(c) Amoeba
(d) Algae
Answer: (a) Rhizobium
Explanation: Rhizobium lives in root nodules of legumes.
Chapter 3: Synthetic Fibres and Plastics MCQs
Rayon is obtained from:
(a) Cotton
(b) Wood pulp
(c) Petroleum
(d) Silk worm
Answer: (b) Wood pulp
Explanation: Rayon is a regenerated cellulose fibre.
Which of the following is a thermosetting plastic?
(a) PVC
(b) Polythene
(c) Bakelite
(d) Nylon
Answer: (c) Bakelite
Explanation: Thermosetting plastics cannot be remoulded once set.
Which of these is a biodegradable material?
(a) Plastic bag
(b) Cotton cloth
(c) Polythene
(d) Nylon
Answer: (b) Cotton cloth
Explanation: Cotton decomposes naturally.
Chapter 4: Materials – Metals and Non-Metals MCQs
Which metal is stored in kerosene?
(a) Sodium
(b) Iron
(c) Copper
(d) Aluminium
Answer: (a) Sodium
Explanation: Sodium reacts vigorously with air and water.
Which metal is used in making electrical wires?
(a) Zinc
(b) Copper
(c) Silver
(d) Aluminium
Answer: (b) Copper
Explanation: Copper has high electrical conductivity.
Which of the following is a non-metal?
(a) Sulphur
(b) Copper
(c) Zinc
(d) Aluminium
Answer: (a) Sulphur
Explanation: Sulphur is brittle and non-conductive.
Which metal is liquid at room temperature?
(a) Mercury
(b) Gallium
(c) Sodium
(d) Zinc
Answer: (a) Mercury
Explanation: Mercury is the only liquid metal at room temperature.
Chapter 5: Coal and Petroleum MCQs
Which of these is a fossil fuel?
(a) Biogas
(b) CNG
(c) LPG
(d) All of these
Answer: (d) All of these
Explanation: All are obtained from petroleum or natural sources.
The process of separating petroleum into fractions is called:
(a) Refining
(b) Filtration
(c) Decantation
(d) Sedimentation
Answer: (a) Refining
Explanation: Refining is done in a petroleum refinery.
Chapter 6: Combustion and Flame MCQs
Q1. The lowest temperature at which a substance catches fire is called:
(a) Boiling point
(b) Ignition temperature
(c) Melting point
(d) Flash point
Answer: (b) Ignition temperature
Explanation: Below ignition temperature, combustion will not start.
Q2. Which of the following is a non-combustible material?
(a) Coal
(b) Paper
(c) Glass
(d) LPG
Answer: (c) Glass
Explanation: Glass does not burn.
Q3. The color of hottest flame is:
(a) Yellow
(b) Blue
(c) Orange
(d) Red
Answer: (b) Blue
Explanation: Blue flame indicates complete combustion.
Chapter 7: Conservation of Plants and Animals MCQs
Q1. The place where animals are protected in their natural habitat is called:
(a) Sanctuary
(b) Zoo
(c) Aquarium
(d) Garden
Answer: (a) Sanctuary
Explanation: Sanctuaries conserve wildlife in natural conditions.
Q2. Which of these is an extinct animal?
(a) Tiger
(b) Elephant
(c) Dodo
(d) Lion
Answer: (c) Dodo
Explanation: Dodo is no longer found on Earth.
Q3. Deforestation leads to:
(a) Soil erosion
(b) Decrease in rainfall
(c) Loss of biodiversity
(d) All of these
Answer: (d) All of these
Explanation: Deforestation impacts soil, climate, and wildlife.
Chapter 8: Cell – Structure and Functions MCQs
Q1. The control center of a cell is:
(a) Cytoplasm
(b) Nucleus
(c) Cell wall
(d) Vacuole
Answer: (b) Nucleus
Explanation: Nucleus regulates cell activities.
Q2. Which is the powerhouse of the cell?
(a) Ribosome
(b) Mitochondria
(c) Golgi body
(d) Plastid
Answer: (b) Mitochondria
Explanation: Mitochondria produce energy (ATP).
Q3. Cell wall is present in:
(a) Animal cell
(b) Plant cell
(c) Both
(d) None
Answer: (b) Plant cell
Explanation: Cell wall gives rigidity to plant cells.
Chapter 9: Reproduction in Animals MCQs
Q1. The fusion of sperm and egg is called:
(a) Fertilization
(b) Ovulation
(c) Pollination
(d) Germination
Answer: (a) Fertilization
Explanation: Fertilization leads to formation of zygote.
Q2. Which type of reproduction involves a single parent?
(a) Sexual
(b) Asexual
(c) Binary fusion
(d) None
Answer: (b) Asexual
Explanation: Asexual reproduction requires only one parent.
Q3. The process of embryo development inside mother’s body is:
(a) Oviparous
(b) Viviparous
(c) External fertilization
(d) Budding
Answer: (b) Viviparous
Explanation: Viviparous animals give birth to young ones.
Chapter 10: Reaching the Age of Adolescence MCQs
Q1. Which hormone controls growth?
(a) Estrogen
(b) Growth hormone
(c) Insulin
(d) Testosterone
Answer: (b) Growth hormone
Explanation: Growth hormone is secreted by the pituitary gland.
Q2. Voice change in boys during puberty is due to:
(a) Larynx enlargement
(b) Thyroid gland
(c) Estrogen
(d) Progesterone
Answer: (a) Larynx enlargement
Explanation: Enlarged larynx causes deeper voice.
Q3. Adolescence is the period between:
(a) Childhood and Adulthood
(b) Birth and Infancy
(c) Old age and Death
(d) None
Answer: (a) Childhood and Adulthood
Explanation: Adolescence marks transition to adulthood.
Chapter 11: Force and Pressure MCQs
Q1. The force acting per unit area is called:
(a) Work
(b) Pressure
(c) Thrust
(d) Energy
Answer: (b) Pressure
Explanation: Pressure = Force ÷ Area.
Q2. Which device is used to measure atmospheric pressure?
(a) Thermometer
(b) Barometer
(c) Hygrometer
(d) Manometer
Answer: (b) Barometer
Explanation: Barometer measures air pressure.
Q3. Which force pulls objects towards Earth?
(a) Magnetic
(b) Gravitational
(c) Frictional
(d) Electrostatic
Answer: (b) Gravitational
Explanation: Gravity attracts objects towards Earth’s center.
Chapter 12: Friction
Q1. Friction is caused by:
(a) Smoothness
(b) Roughness
(c) Lubrication
(d) Rolling
Answer: (b) Roughness
Explanation: Rough surfaces interlock creating friction.
Q2. Which method reduces friction?
(a) Greasing
(b) Sanding
(c) Making surface rough
(d) Using more weight
Answer: (a) Greasing
Explanation: Grease acts as a lubricant.
Q3. Friction is maximum in:
(a) Rolling
(b) Sliding
(c) Static
(d) Fluid
Answer: (c) Static
Explanation: Static friction is greater than sliding friction.
Chapter 13: Sound
Q1. Sound cannot travel through:
(a) Solids
(b) Liquids
(c) Gases
(d) Vacuum
Answer: (d) Vacuum
Explanation: Sound needs a medium to travel.
Q2. The pitch of sound depends on:
(a) Amplitude
(b) Frequency
(c) Speed
(d) Loudness
Answer: (b) Frequency
Explanation: Higher frequency → higher pitch.
Q3. Sound above 20,000 Hz is called:
(a) Audible sound
(b) Infrasound
(c) Ultrasound
(d) Noise
Answer: (c) Ultrasound
Explanation: Humans can’t hear frequencies above 20 kHz.
Chapter 14: Chemical Effects of Electric Current
Q1. The process of depositing a layer of metal using electricity is called:
(a) Electroplating
(b) Galvanization
(c) Corrosion
(d) Oxidation
Answer: (a) Electroplating
Explanation: Electroplating improves appearance & prevents rusting.
Q2. Which liquid is a good conductor of electricity?
(a) Distilled water
(b) Tap water
(c) Pure oil
(d) Sugar solution
Answer: (b) Tap water
Explanation: Tap water contains salts & ions for conduction.
Q3. The glowing of bulb in a circuit shows:
(a) Heat production
(b) Chemical reaction
(c) Current flow
(d) Magnetism
Answer: (c) Current flow
Explanation: Bulb glows only when current passes through.
Chapter 15: Some Natural Phenomena
Q1. The phenomenon of sudden shaking of Earth is called:
(a) Cyclone
(b) Earthquake
(c) Tsunami
(d) Lightning
Answer: (b) Earthquake
Explanation: Earthquakes occur due to movement of tectonic plates.
Q2. The electric discharge between clouds is:
(a) Lightning
(b) Spark
(c) Thunder
(d) Cyclone
Answer: (a) Lightning
Explanation: Lightning is a huge electric spark in clouds.
Q3. Device used to protect buildings from lightning is:
(a) Fuse
(b) Lightning conductor
(c) Circuit breaker
(d) Insulator
Answer: (b) Lightning conductor
Explanation: It directs electric charge safely to ground.
Chapter 16: Light
Q1. The image formed by a plane mirror is:
(a) Real & inverted
(b) Virtual & erect
(c) Real & erect
(d) None
Answer: (b) Virtual & erect
Explanation: Plane mirror forms virtual, same-sized image.
Q2. Which mirror is used in vehicle headlights?
(a) Plane
(b) Convex
(c) Concave
(d) Spherical
Answer: (c) Concave
Explanation: Concave mirror focuses light into a beam.
Q3. The splitting of white light into seven colors is called:
(a) Dispersion
(b) Reflection
(c) Refraction
(d) Diffraction
Answer: (a) Dispersion
Explanation: Dispersion forms a spectrum (VIBGYOR).
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FAQs: MCQs for CBSE Class 8 Science With Answer
Where can I get Class 8 Science MCQs with answers?
Students can find chapter-wise Class 8 Science MCQs with answers on Infinity Learn website that follow the NCERT syllabus. These MCQs often come with explanations and free PDF downloads for offline practice.
Are Class 8 Science MCQs enough for exam preparation?
Yes, practicing MCQs helps you strengthen concepts, revise quickly, and get exam-ready. However, you should also go through NCERT textbook questions, important questions, and sample papers for comprehensive preparation.
How can I download Class 8 Science MCQ PDFs?
Infinity Learn offer free Class 8 Science MCQ PDFs chapter-wise. Look for a Download PDF button on the page. Students can print them as worksheets or solve them offline for better revision.
Do these MCQs follow the latest CBSE syllabus?
Infinity Learn CBSE Class 8 Science MCQs follow the latest CBSE and NCERT syllabus Class 8 Science MCQs.
Which chapters have the highest weightage in Class 8 Science exams?
Chapters like Crop Production and Management, Force & Pressure, Light, Sound, and Chemical Effects of Electric Current are frequently asked in exams. Focus on these chapters first and then cover the rest for a balanced preparation.