Question 1 What are the ways in which physical state of matter can be changed ? Question 2 What is boiling ? Question 3 What is condensation? Question 4 What is freezing? Question 5 What do you mean by inter-conversion of matter? Question 6 What is melting or fusion. Question 7 What does higher melting point indicate ? Question 8 How does a solid changes … [Read more...] about Change in state of matter
Matter in our surrounding
States of Matter
Question 1 Name three states of matter? Question 2 Differentiate between three states of matter ? Question 3 Give full form of LPG and CNG ? Question 4 Why do gases exert more pressure than liquids ? Question 5 Why gases are highly compressible ? Question 6 Why liquids do not have fixed shape but fixed volume ? Question 7 Why water is a liquid and iron rod is … [Read more...] about States of Matter
Characteristics of particle nature of matter
Question 1 What are the characteristics of particle nature of matter ? Question 2 What happens when a crystal of potassium permanganate is mixed with water ? Question 3 Why there is no increase in volume when salt is dissolved in water ? Question 4 How will you show that particles of matter are constantly moving ? Question 5 A piece of chalk can be broken into small … [Read more...] about Characteristics of particle nature of matter
Matter
Question 1 What is matter ? Question 2 Give example of matter ? Matter Anything which occupies space and has mass is called matter. For Ex:Air,water,iron, wood, ice, petrol, rocks etc. Particle nature of matter Matter is made up of particle.The particles which make up matter are so small that we cannot see them even with a high power microscope.Even without … [Read more...] about Matter
Evidences of particle in matter and their motion
Question 1 What happens when crystal of potassium permanganate is dissolved in water ? Question 2 How will you show that matter us made up of particles ? Question 3 How will you show that particles of matter are in motion ? Evidences of particle in matter and their motion Most of the evidences of particles in matter and their motion comes from the experiments on … [Read more...] about Evidences of particle in matter and their motion
Evaporation
Question 1 Define Evaporation ? Question 2 What is the effect of temperature on rate of evaporation ? Question 3 Why does our palm feel cold when we put some acetone or perfume in it. ? Question 4 What type of clothes should we wear in summers and why. Question 5 How does the water kept in an earthen pot become cold during summers. Question 6 Why does a desert … [Read more...] about Evaporation
Water vapours in air
Question 1 How will you show that water vapours are present in air ? Question 2 Name two scales to measure temperature ? Question 3 Convert the temperature 300K to Celsius scale ? Question 4 The boiling point of alcohol is 78°C.What is this temperature on Kelvin scale ? Presence of water vapours in air Water vapours comes into the air from the evaporation of … [Read more...] about Water vapours in air
Diffusion
Question 1 What is diffusion ? Question 2 Give few examples of diffusion ? Question 3 Explain why, when a bottle of perfume is opened in a room, we can smell it even from a considerable distance ? Question 4 Name the process by which a drop of ink spreads in a beaker of water ? Question 5 Out of solid ,liquid and gases which has highest rate of diffusion … [Read more...] about Diffusion
Sublimation
Question 1 What is sublimation. Question 2 Define sublimate. Question 3 Define sublime. Question 4 Give few examples of substances that undergoes sublimation ? Question 5 Why naphthalene balls kept in stored clothes in our homes disappear over a period of time ? Question 6 How does applying pressure help in the liquefaction of a gas ? Question 7 What is the … [Read more...] about Sublimation
Latent heat
Latent heat | Matter in our Surroundings | Class 9 Question 1 What is latent heat ? Question 2 Define the term Latent heat of fusion of a solid ? Question 3 Define the term latent heat of Vaporisation of a liquid? question 4 Why does the temperature remain constant during the melting of ice even though heat is supplied continuously ? Question 5 Why does the … [Read more...] about Latent heat