Ela Chowdary Solutions for Chapter: Air and Atmosphere, Exercise 3: EVALUATION
Author:Ela Chowdary
Ela Chowdary Chemistry Solutions for Exercise - Ela Chowdary Solutions for Chapter: Air and Atmosphere, Exercise 3: EVALUATION
Attempt the practice questions on Chapter 8: Air and Atmosphere, Exercise 3: EVALUATION with hints and solutions to strengthen your understanding. FRANK NEW CERTIFICATE - Chemistry solutions are prepared by Experienced Embibe Experts.
Questions from Ela Chowdary Solutions for Chapter: Air and Atmosphere, Exercise 3: EVALUATION with Hints & Solutions
MEDIUM
7th ICSE
IMPORTANT
Write two uses of carbon dioxide.
HARD
7th ICSE
IMPORTANT
How do human activities cause air pollution?
HARD
7th ICSE
IMPORTANT
Explain acid rain. Write four harmful effects of acid rain.
MEDIUM
7th ICSE
IMPORTANT
List any five uses of nitrogen gas.
HARD
7th ICSE
IMPORTANT
Explain how oxygen can be prepared from hydrogen peroxide with the help of an activity. Write the balanced chemical equation for the reaction.
MEDIUM
7th ICSE
IMPORTANT
Why is helium preferred over hydrogen to fill balloons and airships?
HARD
7th ICSE
IMPORTANT
Why does the mass of magnesium increase when it is burnt?
MEDIUM
7th ICSE
IMPORTANT
Why is hydrogen peroxide used in the preparation of oxygen?
