K.K. GUPTA and STALIN MALHOTRA Solutions for Chapter: Physical and Chemical Changes, Exercise 3: Exercises
K.K. GUPTA Science Solutions for Exercise - K.K. GUPTA and STALIN MALHOTRA Solutions for Chapter: Physical and Chemical Changes, Exercise 3: Exercises
Attempt the practice questions on Chapter 6: Physical and Chemical Changes, Exercise 3: Exercises with hints and solutions to strengthen your understanding. Frank Experience Science solutions are prepared by Experienced Embibe Experts.
Questions from K.K. GUPTA and STALIN MALHOTRA Solutions for Chapter: Physical and Chemical Changes, Exercise 3: Exercises with Hints & Solutions
How does painting prevent iron objects from rusting?
What is an alloy? Is alloying a physical or a chemical change?
What is crystallisation? What is this method used for?
List the changes produced by chemical reactions.
Explain any two methods employed to prevent rusting.
What happens when an iron nail is kept immersed in copper sulphate solution? Write a word equation for the process. Name the type of change involved.
The gas used to cook food in the kitchen is called liquefied petroleum gas (LPG). In the cylinder it exists as liquid. When it comes out of the cylinder, it becomes a gas (change-P), then it burns (change-Q). Think about the change; P and Q. Are they both physical or chemical changes? Give reason in support of your answer.
Gautam's father has got the iron gate and iron grills of his house painted. What do you think is the reason behind this?
