Questions Question 1: What are mixtures? Give examples. Question 2: What are homogeneous mixtures? Give examples. Question 3: What are heterogeneous mixtures? Give examples. Question 4: Give a few properties of homogeneous mixtures. Question 5: Give a few properties of heterogeneous mixtures. Question 6: Differentiate between mixtures and compounds. Question 7: Why is … [Read more...] about Mixtures
Class 9
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 is a substance made up of two or more elements chemically combined in a … [Read more...] about Compound
Elements
Question 1 What is an element. Give few examples? Question 2 How many elements are known till today? Question 3 Name 2 elements which are liquid at room temperature? Question 4 What are the three groups into which elements can be classified? Question 5 Define the term malleable? Question 6 Define the term ductile? Question 7 Why Aluminium metal is used in … [Read more...] about Elements
Is Matter around us Pure
Question 1 What are pure substances. Give examples? Question 2 What are the two types of pure substances. Give example of each? Question 3 What are mixtures. Give example? Question 4 What are the characteristics of pure substances? Question 5 What are the characteristics of impure substances? The matter around us is of two types: (1) Pure Substance (2) … [Read more...] about Is Matter around us Pure
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