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. Which of the following substances is commonly used for making tumblers, toys, pens and pipes? Wood Metal Plastic Glass None 2. Which of the following objects do not sink in water? Leaf and ice Pencil and stone Coin and key Silver ring and gold chain None 3. 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 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. Only c Both a and b Only b Both a and c None 5. 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? Nitrogen Carbon dioxide Hydrogen Oxygen None 6. Pick one material which is completely soluble in water: alum mud sawdust oil None 7. In which of the following sets are the materials liquid under ordinary conditions? Oxygen, nitrogen, sulphur Salt, sugar, cork Milk, water, kerosene Mercury, iron, gold None 8. Which of the following can be classified as hot, luminous and naturally occurring object(s)? Moon Planet Stars Diamond None 9. Which of the following gases is important for aquatic animals? Ammonia Oxygen Carbon dioxide Nitrogen None 10. Milk and water: mix with each other and so, they are miscible liquids none of the above mix with each other and so, they are immiscible liquids do not mix with each other and so, they are miscible liquids None 11. 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 Copper Cardboard Plastic None 12. Transparent substances: allow light to pass through them. absorb all the light incident on them do not allow light to pass through them. allow light to pass through them only partially. None 13. Which of the following statements is incorrect? Vinegar dissolves in water. Sugar and water make a transparent solution Oil mixes well with water. Sand settles down in water. None 14. You are provided with the following materials. Magnifying glassMirrorStainless steel plateGlass tumblerWhich of the above materials will you identify as transparent? (iii) and (iv) (i) and (iii) (i) and (ii) (i) and (iv) None 15. 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 Both a and b Both c and a Only c None 16. 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 green blue None 17. 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 c Only a Only b Both b and c None 18. 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. Wooden toy and iron nail will float, whereas stone, plant leaf and plastic ball will sink. Plant leaf will float, whereas wooden toy, iron nail and plastic ball will sink. None 19. Arrange the following materials in the decreasing order of their compressibility and choose the correct option.Iron, candle, gold, chalk, sponge, cotton Gold, sponge, sotton, shalk, iron, candle Iron, gold, chalk, candle, cotton, sponge Cotton, sponge, candle, chalk, gold, iron Candle, chalk, sponge, cotton, iron, gold None 20. Which of the following properties of gases makes water a vital component for aquatic animals? Transparency Solubility Diffusion Conductivity 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.
