Question 1 What happens when potassium react with water? Question 2 What happens when sodium react with water? Question 3 What happens when aluminium react with water? Question 4 What happens when zinc react with water? Reaction of Metals with Water Metals react with water to form hydroxide, hydrogen gas and heat is evolved. 2K +2H2O ----------> 2KOH + H2 +heat … [Read more...] about Reaction of Metals with Water
Class 10
Reaction of Metals with Oxygen
Question 1 Why sodium and potassium are stored under kerosene oil? Question 2 Give equation for reaction of sodium with oxygen? Question 3 Give equation for reaction of potassium with oxygen? Question 4 What happens when sodium oxide reacts with water? Question 5 What happens when potassium oxide reacts with water? Question 6 What are amphoteric oxides? Reaction … [Read more...] about Reaction of Metals with Oxygen
Non-Metals
Question 1 Name one non-metal which conduct electricity? Question 2 Name one non-metal which have shiny surface? Question 3 Name one non-metal which is hard? Question 4 Name one non-metal having high melting point? Question 5 Why graphite is used in making electrodes? Question 6 Name one non-metal which is brittle? Question 7 Name one non-metal which has low … [Read more...] about Non-Metals
Water of crystallisation
Question 1 What is meant by water of crystallisation? Give example? Question 2 What are hydrated salts? Question 3 What are anhydrous salts? Question 4 Name a compound which contains two molecules of water of crystallisation? Question 5 Why copper sulphate is blue in colour? Water Of Crystallisation The water molecules which form part of the structure of a … [Read more...] about Water of crystallisation
Plaster of Paris
Question 1 Write the chemical formula and name of plaster of paris? Question 2 What is gypsum? Question 3 Name the calcium compound which hardens on wetting with water? Question 4 What will happen if heating is not controlled while preparing plaster of paris? Question 5 Name the compound which is used in hospitals for setting fracture bones? Question 6 How … [Read more...] about Plaster of Paris