Ncert- class 6- science-Chapter 11: Air Around Us 2 Welcome to your Ncert- class 6- science-Chapter 11: Air Around Us 2 1. Evaporation of water in shade is: No evaporation takes place in shade faster slower None of these None 2. The blanket of gases that surrounds the earth is called __________. biospehere air lithosphere atmosphere None 3. The components of air which are harmful to living beings are smoke and water vapour. dust and smoke. nitrogen and carbon dioxide. dust and water vapour. None 4. Which of these applies to nitrogen? It is 78% by volume. It help in burning It helps in respiration It help in photosynthesis None 5. Identify the gas "Odourless, Colourless, Heavier than air, supports combustion" Carbon Dioxide Oxygen Water vapours Nitrogen None 6. Carbon dioxide, argon, methane, ozone and water vapour are also present in air in: equal quantities None of these very small quantities very large quantities None 7. Finer hair inside the nose Filter the microbes Prevent the water vapour Prevent the carbon dioxide gas Filter the dust particle None 8. Boojho took an empty plastic bottle, turned it upside down and dipped its open mouth into a bucket filled with water. He then tilted the bottle slightly and made the following observations. Bubbles of air came out from the bottle.Some water entered the bottle.Nitrogen gas came out in the form of bubbles and oxygen got dissolved in water.No bubbles formed, only water entered the bottle.Which observation(s) is/are correct? (iv) only (ii) and (iv) (iii) and (iv) (i) and (ii) None 9. Why was there no oxygen in the early atmosphere? No animals No vegetation No water No fire None 10. Wind does not help in the movement of which of the following? Weather cock Sailing yacht Firki Ceiling fan None 11. Which of the following statements is incorrect? We can feel air but we cannot see it. All living things require air to breathe. Moving air makes it possible to fly a kite. Air is present everywhere but not in soil. None 12. What is not true about air? It helps in the movements of aeroplanes Birds can fly due to presence of air. It makes the windmill rotate. It has no role in water cycle. None 13. Clothes dry faster when there is ______ water vapour in air. more none of these less either less or more None 14. Which of the following is not a constituent of the atmosphere? Oxygen Carbon dioxide Manganese dioxide Nitrogen None 15. Mountaineers carry oxygen cylinders with them because? there is deficiency of oxygen on mountains at high altitude. oxygen is used for cooking. oxygen keeps them warm at low temperature. there is no oxygen on high mountains. None 16. The amount of water vapour in air is termed as None of the above dew humidity mist None 17. Usha took a lump of dry soil in a glass and added water to it till it was completely immersed. She observed bubbles coming out. The bubbles contain water vapour. only oxygen gas. none of these. air None 18. This is used as a fuel in rockets for combustion of fuels Carbon dioxide Liquid oxygen Hydrogen Nitrogen None 19. Which of the following statements is incorrect? Moving air makes it possible to fly a kite We can feel air but we cannot see it. All living things require air to breathe. Air is present everywhere but not in soil None 20. What is not true about air It has no role in water cycle. It makes the windmill rotate. It helps in the movements of aeroplanes Birds can fly due to presence of air. None Time's up Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
