Last updated on August 30th, 2023 at 01:45 am
Looking for information on Class 9 Matter in Our Surroundings? This topic explores the properties and behavior of matter in different states, such as solid, liquid, and gas.
Answer the following Questions in Short.
Q: What is the boiling point of water at atmospheric pressure?
A: The boiling point of water at atmospheric pressure is 100°C (or 373 K).
Q: What is sublimation?
A: Â Sublimation is the process in which a solid changes directly into a gas without passing through the liquid state.
Q: What is evaporation?
A: Â Evaporation is the process in which a liquid changes into vapour at any temperature below its boiling point.
Q: How do the forces of attraction between particles differ in solids, liquids, and gases?
A: The forces of attraction between particles are maximum in solids, intermediate in liquids, and minimum in gases.
Q: What factors affect the rate of evaporation?
A: The rate of evaporation depends upon the surface area exposed to the atmosphere, the temperature, the humidity, and the wind speed.
Q: What is sublimation?
A: Sublimation is the change of solid state directly to gaseous state without going through liquid state.
Q: What is deposition?
A: Deposition is the change of gaseous state directly to solid state without going through liquid state.
Q: What is matter?
A: Matter is anything that has mass and occupies space. It includes everything in the universe, such as air, water, food, stones, plants, and animals.
Q: What is kinetic energy?
A: Kinetic energy is the energy possessed by particles of matter due to their continuous movement.
Q: How does heating affect diffusion?
A: On heating, diffusion becomes faster.
Q: How do solids and liquids diffuse into liquids?
A: Solids and liquids can diffuse into liquids by getting into the spaces between the particles.
Q: What are the three states of matter?
A: The three states of matter are solid, liquid, and gas.
Q: What is latent heat of vaporization?
A: Latent heat of vaporization is the heat energy required to change 1 kg of a liquid to gas at atmospheric pressure at its boiling point.
Q: What is latent heat of fusion?
A: Latent heat of fusion is the amount of heat energy required to change 1 kg of solid into liquid at its melting point.
Q: How can the state of matter be changed?
A: The state of matter can be changed by changing temperature or pressure.
