STUDY MCQ

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...

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...