Question 1 What are neutralisation reactions? Give example? Question 2 What are neutral salts, acidic salts and basic salts? Give examples? Question 3 What is a salt?Give few examples? Question 4 Explain why an antacid tablet is taken when you suffer from acidity? Question 5 Why calamine solution is applied on the skin where an ant bites? Question 6 Name … [Read more...] about Neutralisation And Salts
Class 7
Indicators, Acids and Bases
Question 1 What is an indicator? Name three indicators? Question 2 What is the use of litmus solution? Question 3 Why does a yellow curry stain on a white shirt turn red when it is washed with soap? Question 4 Give few differences between acids and bases? Question 5 What are acids? Name different types of acids? Give examples ? Question 6 What are bases? Name … [Read more...] about Indicators, Acids and Bases
Transfer of Heat
Question 1 How woollen clothes keep us warm during cold winter days? Question 2 Why wearing more layers of clothing during winter keeps us warmer than wearing just one thick piece of clothing? Question 3 Explain how the water in a beaker gets heated when a burner is kept below it? Question 4 Explain how the air in a room gets heated when a room heater kept on a floor … [Read more...] about Transfer of Heat
Temperature
Question 1 What is clinical thermometer? What is its range? Why it is not used to measure high temperature? Question 2 What is a thermometer? Name two types of thermometers? Which type of thermometer is used to measure human body temperature? Question 3 Why laboratory thermometer is not suitable for measuring human body temperature? Question 4 What is the function of … [Read more...] about Temperature
Silk
Question 1 What is meant by sericulture? Question 2 What are the characteristics of silk fibres obtained from the cocoons of silk moth? Question 3 How will you distinguish between natural and artificial silk? Question 4 What is meant by reeling the silk? How is it done? Question 5 What is a cocoon? name the fibre of which a cocoon is made? Question 6 Describe … [Read more...] about Silk