Category: Is matter around us pure

Question 1 What do you mean by separation of mixtures? Question 2 How will you separate a mixture containing sand and sugar? Question 3 Describe a method to separate a mixture of sand and salt? Question 4 How will you separate a mixture of salt and sugar? Question 5 Name a solvent used to separate…

Class 9, Is matter around us pure

Physical and chemical change

Question 1 What is a physical change.Give example? Question 2 What is a chemical change.Give example ? Question 3 Give the main differences between physical and chemical change? Physical and Chemical changes Physical changes The changes in which no new substance are formed,are called physical changes. In a physical change,the substances involved do not change their…

Class 9, Is matter around us pure

Colloids

Question 1 What are colloids.Give example? Question 2 What do you mean by Tyndall effect? Question 3 Give properties of colloids? Question 4 What are sol.Give example? Question 5 What are aerosol.Give example? Question 6 What are emulsions.Give example? Question 7 What are foam.Give example? Question 8 What is the difference between solution and colloids?…

Class 9, Is matter around us pure

Suspension

Question 1 What are suspensions.Give example? Question 2 Give properties of suspension? SUSPENSIONS Those substances which are insoluble in water form suspension. A suspension is a heterogeneous mixture in which small particles of a solid are spread throughout a liquid without dissolving in it. For Ex:Chalk+water,Muddy Water,sand+water,Flour+water etc. Properties 1)It is heterogeneous in nature. 2)The size…

Class 9, Is matter around us pure

Solution

Question 1 Define the term solute? Question 2 Define the term solvent? Question 3 Define the term solution.Give examples? Question 4 Give few properties of solution? Question 5 What is an aqueous solution ? Question 6 What is a non-aqueous solution? Question 7 Give an example of liquid in liquid solution ? Question 8 How will…

Class 9, Is matter around us pure

Mixtures

Question 1 What are mixtures.Give example? Question 2 What are homogenous mixture.Give example? Question 3 What are heterogenous mixture.Give example? Question 4 Give few properties of homogenous mixture? Question 5 Give few properties of heterogenous mixture? Question 6 Differentiate between mixtures and compounds ? Question 7 Why air is considered a mixture not a compound ? MIXTURES A…

Class 9, Is matter around us pure

Compound

Question 1 What are compounds ? Question 2 Give few examples of compound? Question 3 Give few properties of compounds ? Question 4 What happens when a mixture of iron filling and sulphur powder is heated ? Question 5 Why water is a compound and not a mixture? COMPOUNDS A compound…

Class 9, Is matter around us pure

Elements