• Skip to main content
  • Skip to secondary menu
  • Skip to primary sidebar

Class Notes

Free Education for All

  • Class 1-5
  • Class 6
  • Class 7
  • Class 8
  • Class 9
  • Class 10
  • Class 11
  • Class 12
  • NCERT Solutions
    • NCERT Books

Air Around Us

Availability of Oxygen to Plants and Animals

Last Updated on November 23, 2020 By Mrs Shilpi Nagpal Leave a Comment

Question 1 How  will you show that air is present in a lump of soil? Question 2 How will you show that air is dissolved in water? Question 3 How do plants and animals maintain the balance of oxygen and carbon dioxide gases in air? Question 4 State few uses of windmill? Question 5 State uses of air? Question 6 Why are burrows and holes dug deep into soil by the … [Read more...] about Availability of Oxygen to Plants and Animals

Carbon Dioxide, Water Vapours and Smoke

Last Updated on November 23, 2020 By Mrs Shilpi Nagpal 1 Comment

Question 1 State few properties of Carbon Dioxide gas? Question 2 From where does dust enter into the air? Question 3 Why should we breathe through the nose and not through the mouth? Question 4 What is smoke?How is smoke produced? Question 5 Explain why, tall chimneys are installed in factories? Question 6 Why do traffic policeman often wear mask at a crowded … [Read more...] about Carbon Dioxide, Water Vapours and Smoke

Oxygen and Nitrogen

Last Updated on November 23, 2020 By Mrs Shilpi Nagpal Leave a Comment

Oxygen is necessary for burning

Question 1 State few properties of Nitrogen? Question 2 State few properties of oxygen? Question 3 Why do mountaineers carry oxygen cylinders with them while climbing high mountains? Question 4 How will you show that oxygen or air is necessary for burning? Question 5 Explain why ,if the clothes of a person catches fire accidentally, he is covered with a woollen … [Read more...] about Oxygen and Nitrogen

Composition of Air

Last Updated on November 23, 2020 By Mrs Shilpi Nagpal Leave a Comment

Air is a mixture of gases

Question 1 What is air? State the composition of air? Question 2 Write few properties of air? Question 3 Describe an activity to show that a glass bottle which appears to be empty to us is actually filled with air? Question 4 How will you show that air is a mixture of gases? Question 5 What is atmosphere? Question 6 Why do mountaineers carry oxygen cylinders with … [Read more...] about Composition of Air

Primary Sidebar

Recent Posts

  • Determiners
  • Organometallic Compounds
  • Metal Carbonyls
  • Method of Preparation and Importance of Coordination Compounds
  • Exercise 1.3
  • Exercise 1.2
  • Exercise 1.1
  • Stability of Coordination Compounds in Solution
  • Crystal Field Theory
Copyright © 2016-2021 | About Us | Contact Us | Privacy Policy | Facebook | Pinterest | Twitter