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