Sonali Dubey, Atul Sharma and, Sanjay Asthana Solutions for Chapter: Changes Around Us, Exercise 2: Brain Teasers
Author:Sonali Dubey, Atul Sharma & Sanjay Asthana
Sonali Dubey Science Solutions for Exercise - Sonali Dubey, Atul Sharma and, Sanjay Asthana Solutions for Chapter: Changes Around Us, Exercise 2: Brain Teasers
Attempt the free practice questions on Chapter 9: Changes Around Us, Exercise 2: Brain Teasers with hints and solutions to strengthen your understanding. SCIENCE ROUTE 7 solutions are prepared by Experienced Embibe Experts.
Questions from Sonali Dubey, Atul Sharma and, Sanjay Asthana Solutions for Chapter: Changes Around Us, Exercise 2: Brain Teasers with Hints & Solutions
EASY
7th CBSE
IMPORTANT
Tearing of a paper is a physical change but burning of paper does not. Why?
EASY
7th CBSE
IMPORTANT
When we cut an apple into pieces, the surface of the pieces turns brown. Why?
MEDIUM
7th CBSE
IMPORTANT
Desert area usually do not face problem of rusting. Why?
EASY
7th CBSE
IMPORTANT
Meeta saw that the volume of perfume in her bottle had become less after a few days. Probably the perfume had evaporated. Is the evaporation of perfume a physical change or a chemical change?
