Subject Experts Solutions for Chapter: Physical and Chemical Changes, Exercise 3: Time to Think

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Subject Experts Science Solutions for Exercise - Subject Experts Solutions for Chapter: Physical and Chemical Changes, Exercise 3: Time to Think

Attempt the practice questions on Chapter 6: Physical and Chemical Changes, Exercise 3: Time to Think with hints and solutions to strengthen your understanding. Galaxy Science in Everyday Life solutions are prepared by Experienced Embibe Experts.

Questions from Subject Experts Solutions for Chapter: Physical and Chemical Changes, Exercise 3: Time to Think with Hints & Solutions

MEDIUM
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 6 - Physical and Chemical Changes>Time to Think>Q 1

Certain physical changes cannot be reversed by simple physical means. For example, if a page of paper is torn into pieces, you cannot make the same page using the pieces by a simple physical means. Can we call it an irreversible physical change? Can you give a few more such examples.

MEDIUM
7th CBSE
IMPORTANT
Galaxy Science in Everyday Life>Chapter 6 - Physical and Chemical Changes>Time to Think>Q 2

Why is carbon dioxide gas formed when a piece of paper or wood is burnt? Can you explain it with the help of a word equation?