🌱 Biodiversity & Conservation Part 1: Q1–Q25 Q1. The term ‘biodiversity’ refers to: a) Variety of ecosystems b) Variety of species c) Genetic variation within species d) All of the above ✅ Explanation: Biodiversity includes diversity at genetic, species, and ecosystem levels. Q2. Which of the following is a “hotspot …
🌍 Environmental Issues – MCQs Part 1: Q1–Q25 Q1. The major cause of ozone depletion is emission of: a) CO₂ b) CFCs (chlorofluorocarbons) ✅ c) SO₂ d) NO₂ Explanation: CFCs release chlorine radicals in the stratosphere that catalyze the breakdown of ozone (O₃). Q2. The protocol to control ozone-depleting substances …
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Chapter 6 – Life Processes – MCQs (Part 1: Q1–Q25) Q1. The basic life processes are: a) Respiration, Excretion, Movement, Reproduction b) Nutrition, Respiration, Transportation, Excretion ✅ c) Growth, Locomotion, Reproduction, Excretion d) Circulation, Excretion, Photosynthesis, Movement Answer: b) Nutrition, Respiration, Transportation, Excretion Explanation: These are essential for maintaining life …
Chapter 7 – Control and Coordination – MCQs (Part 1: Q1–Q25) Q1. The structural and functional unit of the nervous system is: a) Brain b) Nephron c) Neuron ✅ d) Axon Answer: c) Neuron Explanation: Neurons are specialized cells that transmit nerve impulses. Q2. The longest part of a neuron …
Chapter 8 – How Do Organisms Reproduce? – MCQs (Part 1: Q1–Q25) Q1. The process by which new organisms are produced from existing ones is called: a) Respiration b) Photosynthesis c) Reproduction ✅ d) Evolution Answer: c) Reproduction Explanation: Reproduction ensures continuity of life by producing new individuals of the …
Chapter 9 – Heredity and Evolution – MCQs (Part 1: Q1–Q25) Q1. The unit of heredity is: a) Chromosome b) Gene ✅ c) DNA d) Trait Answer: b) Gene Explanation: Genes are segments of DNA that determine specific traits and are the basic unit of heredity. Q2. Which structure carries …
Light reflection and refraction mcqs for class 10, cbse class 10 light reflection mcqs with answers, important physics mcqs on reflection and refraction, class 10 science board exam practice questions, solved multiple choice questions on light class 10, objective type questions for class 10 reflection refraction, light chapter mcqs …
Chapter 11 – Human Eye and Colourful World – MCQs (Part 1: Q1–Q25) Q1. The human eye forms the image of an object at: a) Cornea b) Retina c) Lens d) Iris ✅ Answer: b) Retina Explanation: Retina acts as a screen where real and inverted images are formed. Q2. …
Chapter 12 – Electricity – MCQs (Part 1: Q1–Q25) Q1. The SI unit of electric current is: a) Volt b) Ampere c) Ohm d) Coulomb ✅ Answer: b) Ampere Explanation: Current is measured in amperes (A), which represents 1 coulomb of charge per second. Q2. Electric potential difference is measured …
Chapter 13 – Magnetic Effects of Electric Current – MCQs (Part 1: Q1–Q25) Q1. The magnetic field produced around a current-carrying conductor is due to: a) Motion of protons b) Motion of neutrons c) Motion of electrons d) Stationary charges ✅ Answer: c) Motion of electrons Explanation: A current is …
Chapter 14 – Sources of Energy – MCQs (Part 1: Q1–Q25) Q1. Which of the following is a renewable source of energy? a) Coal b) Petroleum c) Solar energy d) Natural gas ✅ Answer: c) Solar energy Explanation: Solar energy is inexhaustible and renewable, unlike fossil fuels. Q2. Which of …
Chapter 15 – Our Environment – MCQs (Part 1: Q1–Q25) Q1. Which of the following is a biodegradable substance? a) Plastic b) Glass c) Paper d) Aluminium foil ✅ Answer: c) Paper Explanation: Paper is biodegradable as it can be decomposed by microorganisms. Q2. Which of the following is a …
Chapter 16 – Management of Natural Resources – MCQs (Part 1: Q1–Q25) Q1. Which of the following is NOT a natural resource? a) Air b) Water c) Plastic d) Forests ✅ Answer: c) Plastic Explanation: Plastic is man-made, not naturally occurring, hence not a natural resource. Q2. Which of the …
Chapter 12 – Sound – MCQs (Part 1: Q1–Q25) Q1. Sound cannot travel through: a) Solids b) Liquids c) Vacuum d) Gases Answer: c) Vacuum 👉 Explanation: Sound requires a medium (solid, liquid, or gas) for propagation. It cannot travel in a vacuum. Q2. Which of the following is a …
Chapter 14 – Natural Resources – MCQs (Part 1: Q1–Q25) Q1. Which of the following is a non-renewable natural resource? a) Water b) Soil c) Petroleum ✅ d) Forest Answer: c) Petroleum Explanation: Petroleum cannot be replenished quickly; it is a non-renewable fossil fuel. Q2. Which is the primary source …
Chapter 13 – Why Do We Fall Ill – MCQs (Part 1: Q1–Q25) Q1. Which of the following is NOT a factor that determines health? a) Balanced diet b) Good housing c) Chronic illness d) Playing video games Answer: d) Playing video games 👉 Explanation: Balanced diet, good housing, and …