Change in state of matter

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…

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 ?…

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 ?…

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…

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…

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…

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…

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…

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 ?…

Latent heat

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 temperature remain…