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