Lakhmir Singh and Manjit Kaur Solutions for Chapter: Physical and Chemical Changes, Exercise 3: Long Answer Type Questions
Lakhmir Singh Science Solutions for Exercise - Lakhmir Singh and Manjit Kaur Solutions for Chapter: Physical and Chemical Changes, Exercise 3: Long Answer Type Questions
Attempt the practice questions on Chapter 6: Physical and Chemical Changes, Exercise 3: Long Answer Type Questions with hints and solutions to strengthen your understanding. AWARENESS SCIENCE for Seventh Class solutions are prepared by Experienced Embibe Experts.
Questions from Lakhmir Singh and Manjit Kaur Solutions for Chapter: Physical and Chemical Changes, Exercise 3: Long Answer Type Questions with Hints & Solutions
What happens when an iron nail is kept immersed in copper sulphate solution? Write a word equation for this process. Name the type of change involved.
What happens when baking soda is added to vinegar? Write a word equation for this reaction. Name the type of change which takes place.
What happens when carbon dioxide gas is passed through lime water? Write a word equation for this process. Name the type of change which takes place.
When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is this? Explain.
When a candle burns, both physical and chemical changes take place. Identify these changes.
Explain why, burning of wood and cutting of wood into small pieces are considered as two different types of changes.
What happens when magnesium ribbon is burnt in air? Write a word equation for this process. Name the type of change which takes place.
What happens when magnesium oxide is dissolved in water? Write a word equation for this process. Name the type of change which takes place.
