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