Veera Bala Rastogi and Shalini Mahajan Solutions for Chapter: Physical and Chemical Changes, Exercise 3: PRACTICE TIME
Veera Bala Rastogi Science Solutions for Exercise - Veera Bala Rastogi and Shalini Mahajan Solutions for Chapter: Physical and Chemical Changes, Exercise 3: PRACTICE TIME
Attempt the practice questions on Chapter 7: Physical and Chemical Changes, Exercise 3: PRACTICE TIME with hints and solutions to strengthen your understanding. Science Booster solutions are prepared by Experienced Embibe Experts.
Questions from Veera Bala Rastogi and Shalini Mahajan Solutions for Chapter: Physical and Chemical Changes, Exercise 3: PRACTICE TIME with Hints & Solutions
Burning of a substance is a chemical change _____
Stretching a spring is a chemical change. _____
On mixing magnesium oxide with water, a new substance called magnesium chloride is formed.
On mixing baking soda with vinegar, hydrogen gas is produced.
Write the name of the metal which burns with a dazzling white flame. (Magnesium/ Sodium/ Copper)
Name a method which can prevent rusting.
Is inflating a balloon a physical or a chemical change?
Complete the crossword puzzle with the help of given clues.
Across
1. A substance formed by mixing metals.
4. A metal that burns with a dazzling white flame.
6. A change in which new substance is formed.
7. A gas that produces a 'pop' sound.
Down
2. A chemical compound represented by the formula .
3. A reddish-brown substance formed on iron articles on exposure to moist air.
5. A yellow colour nonmetal which reacts with iron to form its sulphide.
