Ncert- class 6- science-Chapter 11: Air Around Us 2 Welcome to your Ncert- class 6- science-Chapter 11: Air Around Us 2 1. Which of the following is not a constituent of the atmosphere? Nitrogen Oxygen Carbon dioxide Manganese dioxide None 2. 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 3. Wind does not help in the movement of which of the following? Ceiling fan Sailing yacht Weather cock Firki None 4. The blanket of gases that surrounds the earth is called __________. air lithosphere atmosphere biospehere None 5. Finer hair inside the nose Filter the microbes Prevent the carbon dioxide gas Filter the dust particle Prevent the water vapour None 6. What is not true about air? Birds can fly due to presence of air. It makes the windmill rotate. It has no role in water cycle. It helps in the movements of aeroplanes None 7. 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. Air is present everywhere but not in soil All living things require air to breathe. None 8. Clothes dry faster when there is ______ water vapour in air. none of these more either less or more less None 9. Evaporation of water in shade is: No evaporation takes place in shade faster slower None of these None 10. This is used as a fuel in rockets for combustion of fuels Nitrogen Carbon dioxide Hydrogen Liquid oxygen None 11. 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? (ii) and (iv) (i) and (ii) (iii) and (iv) (iv) only None 12. Carbon dioxide, argon, methane, ozone and water vapour are also present in air in: very small quantities equal quantities None of these very large quantities None 13. 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. air only oxygen gas. none of these. None 14. The amount of water vapour in air is termed as dew None of the above mist humidity None 15. Identify the gas "Odourless, Colourless, Heavier than air, supports combustion" Nitrogen Oxygen Carbon Dioxide Water vapours None 16. Why was there no oxygen in the early atmosphere? No fire No vegetation No animals No water None 17. 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 18. Which of these applies to nitrogen? It help in burning It is 78% by volume. It help in photosynthesis It helps in respiration None 19. The components of air which are harmful to living beings are dust and water vapour. smoke and water vapour. dust and smoke. nitrogen and carbon dioxide. None 20. Mountaineers carry oxygen cylinders with them because? there is no oxygen on high mountains. oxygen keeps them warm at low temperature. oxygen is used for cooking. there is deficiency of oxygen on mountains at high altitude. 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.
