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CLASS 6_ MATTER

STATES OF MATTER https://www.youtube.com/watch?v=21CR01rlmv4 Inter conversion of States of matter https://www.youtube.com/watch?v=xYU7RSoOZ0U These are links to simulations on Matter https://phet.colorado.edu/en/simulation/states-of-matter https://phet.colorado.edu/en/simulation/states-of-matter-basics

WATER_ CLASS 9

WATER Saturated, Unsaturated and Supersaturated Solution On the basis of solubility solutions are classified into three types: A solution that cannot dissolve anymore of the solute at a given temperature is called a saturated solution. A solution in which more solute can be dissolved is called an unsaturated solution. A solution in which more solute is present at a given temperature than in a saturated solution is called a supersaturated solution. E.g. The maximum amount of NaCl which can be dissolved in100g of water at 25 is 36g. So if a solution contains 36g of NaCl dissolved in 100g water then it is a saturated solution. If 10g NaCl is dissolved in 100g of water at 25 , it is an unsaturated solution. Now if we have a NaCl solution in which 50g of NaCl is dissolved in 100g of water at 25 then it is supersaturated solution. Solution: A solution is a homogeneous mixture of two or more components. The two components of the solutio...

PHYSICAL AND CHEMICAL CHANGE _ CLASS 7

PHYSICAL AND CHEMICAL CHANGES EXERCISE QUESTION Copy the question and answer in Chemistry copy. Q.1. What do you observe when: i. Water is boiled? Ans.: Water changes to steam. ii. A piece of paper is burnt? Ans.: The paper turns into ash. iii. Some ice cubes are kept in glass tumbler. Ans.: The ice melts and changes to liquid water. Water droplets are for...

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