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Class 9 Science NCERT MCQs Chapter 2 IS MATTER AROUND US PURE?

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NCERT MCQs of Class 9 Science (Chemistry) Chapter 2 Is Matter Around Us Pure?   1) Which of the following is a pure substance? (a) Air (b) Brass (c) Water (d) Soil Answer: (c) Water Explanation: Water is a pure substance because it has a fixed composition and chemical formula (H₂O). 2) What type of mixture is a solution of sugar in water? (a) Homogeneous mixture (b) Heterogeneous mixture (c) Colloid (d) Suspension Answer: (a) Homogeneous mixture Explanation: Sugar dissolves completely in water, forming a uniform mixture throughout. 3) Which of the following can be separated using a separating funnel? (a) Salt and water (b) Oil and water (c) Alcohol and water (d) Sugar and water Answer: (b) Oil and water Explanation: Oil and water are immiscible liquids and can be separated using a separating funnel. 4) What happens to the solubility of solids in water as temperature increases? (a) It decreases (b) It increases (c) It remains unchanged (d) It first inc...
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Class 10 NCERT General Science MCQs-Chapter 5-Life Processes

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  NCERT MCQs of Class 10 General Science, Chapter no 5 (Life Processes) 1) Which of the following is not a life process? (a) Respiration (b) Nutrition (c) Excretion (d) Growth of crystals Answer: (d) Growth of crystals Explanation: Life processes are activities performed by living organisms to sustain life, and growth of crystals is a physical process, not a biological one. 2) What is the primary source of energy for living organisms? (a) Carbohydrates (b) Sunlight (c) Vitamins (d) Proteins Answer: (b) Sunlight Explanation: Sunlight is the primary energy source for life on Earth, as it powers photosynthesis in plants. 3) In which part of the plant does photosynthesis mainly occur? (a) Roots (b) Stem (c) Leaves (d) Flowers Answer: (c) Leaves Explanation: Leaves contain chlorophyll, which captures sunlight to perform photosynthesis. 4) What is the end product of photosynthesis?...
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Class 9 Science NCERT MCQs Chapter 1 MATTER IN OUR SURROUNDINGS

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NCERT MCQs of Class 9 (Chemistry) Chapter 1 Mater in Our Surroundings   1) Which of the following is NOT a characteristic of matter? A) It has mass B) It occupies space C) It has no volume D) It is made up of particles ✅ Answer: C) It has no volume 📝 Explanation: Matter always has volume. Everything that has mass and occupies space is called matter. 2) The interparticle force of attraction is strongest in: A) Solids B) Liquids C) Gases D) Plasma ✅ Answer: A) Solids 📝 Explanation: The particles in solids are tightly packed, making the force of attraction stronger than in liquids or gases. 3 ) Which of the following is an example of diffusion? A) Ice melting B) Sugar dissolving in water C) The spreading of perfume in a room D) Boiling of water ✅ Answer: C) The spreading of perfume in a room 📝 Explanation: Diffusion is the movement of particles from a region of higher concentration to a region of lower concentration. 4 ) Which state of matter has no fixe...
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