Ncert – class 6- science – Chapter 2: Sorting Materials and Groups-2 Welcome to your Ncert - class 6- science - Chapter 2: Sorting Materials and Groups-2 1. Some gases are soluble in water. Which of the following gases is soluble in water, and in the dissolved state, is used by the aquatic plants to prepare their food? Oxygen Nitrogen Carbon dioxide Hydrogen None 2. Transparent substances: allow light to pass through them only partially. allow light to pass through them. absorb all the light incident on them do not allow light to pass through them. None 3. Lustre is the property of a material to shine when it is freshly cut or sand-papered. Which of the following freshly sand-papered surfaces will have lustre? Wood Plastic Copper Cardboard None 4. Which of the following statements is/are incorrect?a. Iodine crystals have lustre.b. All metals have a silvery white lustre.c. Gases are non-lustrous. Both a and b Both a and c Only c Only b None 5. Which of the following properties of gases makes water a vital component for aquatic animals? Transparency Diffusion Conductivity Solubility None 6. Which of the following statements is incorrect? Sand settles down in water. Oil mixes well with water. Sugar and water make a transparent solution Vinegar dissolves in water. None 7. Which of the following statements is/are correct?a. Rubber is a bad conductor of electricity.b. Ice floats on oil.c. Wax floats on oil. Both b and c Only c Both a and b Both c and a None 8. Silver metal is silvery-white in colour. When exposed to air, the moisture and the atmospheric gases react with it and corrode it. The colour of the corroded metal surface is Yellow Black blue green None 9. Which of the following statements is/are true?a. Metals lose their luster gradually when exposed to air and moisture for long time. b. Stone is a transparent material.c. Ice sinks in water. Only b Only c Both b and c Only a None 10. Substances lighter than water float on it whereas those heavier than it sink in it. Which of the following substances is heavier than water and sinks in it? Ice Kerosene oil Wax Chalk powder None 11. Milk and water: none of the above mix with each other and so, they are immiscible liquids mix with each other and so, they are miscible liquids do not mix with each other and so, they are miscible liquids None 12. You are provided with the following materials. Magnifying glassMirrorStainless steel plateGlass tumblerWhich of the above materials will you identify as transparent? (i) and (iv) (i) and (iii) (i) and (ii) (iii) and (iv) None 13. Shreya is provided with the following objects and asked to put them in a bucket containing water.Wooden toy, iron nail, stone, plant leaf, and plastic ballWhich among the given objects will float and which will sink in water? Wooden toy, plant leaf and plastic ball will float, whereas iron nail and stone will sink. Iron nail and plastic ball will float, whereas wooden toy and stone will sink. Plant leaf will float, whereas wooden toy, iron nail and plastic ball will sink. Wooden toy and iron nail will float, whereas stone, plant leaf and plastic ball will sink. None 14. In which of the following sets are the materials liquid under ordinary conditions? Salt, sugar, cork Milk, water, kerosene Mercury, iron, gold Oxygen, nitrogen, sulphur None 15. Arrange the following materials in the decreasing order of their compressibility and choose the correct option.Iron, candle, gold, chalk, sponge, cotton Candle, chalk, sponge, cotton, iron, gold Iron, gold, chalk, candle, cotton, sponge Cotton, sponge, candle, chalk, gold, iron Gold, sponge, sotton, shalk, iron, candle None 16. Pick one material which is completely soluble in water: sawdust mud alum oil None 17. Which of the following objects do not sink in water? Leaf and ice Coin and key Pencil and stone Silver ring and gold chain None 18. Which of the following substances is commonly used for making tumblers, toys, pens and pipes? Glass Plastic Wood Metal None 19. Which of the following gases is important for aquatic animals? Carbon dioxide Oxygen Nitrogen Ammonia None 20. Which of the following can be classified as hot, luminous and naturally occurring object(s)? Diamond Stars Planet Moon 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.
