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. Pick one material which is completely soluble in water: mud sawdust oil alum None 2. 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 a Both b and c Only c None 3. Which of the following statements is incorrect? Sand settles down in water. Vinegar dissolves in water. Oil mixes well with water. Sugar and water make a transparent solution None 4. Milk and water: do not mix with each other and so, they are miscible liquids mix with each other and so, they are miscible liquids mix with each other and so, they are immiscible liquids none of the above None 5. 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 (ii) (i) and (iii) (i) and (iv) None 6. 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? Hydrogen Carbon dioxide Oxygen Nitrogen None 7. 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? Wax Ice Kerosene oil Chalk powder None 8. 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? Plant leaf will float, whereas wooden toy, iron nail and plastic ball will sink. Wooden toy, plant leaf and plastic ball will float, whereas iron nail and stone will sink. Wooden toy and iron nail will float, whereas stone, plant leaf and plastic ball will sink. Iron nail and plastic ball will float, whereas wooden toy and stone will sink. None 9. Which of the following gases is important for aquatic animals? Carbon dioxide Ammonia Nitrogen Oxygen None 10. 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? Cardboard Plastic Copper Wood None 11. Transparent substances: allow light to pass through them. absorb all the light incident on them allow light to pass through them only partially. do not allow light to pass through them. None 12. 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 b Only c Both a and c Both a and b None 13. 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 14. Which of the following substances is commonly used for making tumblers, toys, pens and pipes? Metal Glass Wood Plastic None 15. In which of the following sets are the materials liquid under ordinary conditions? Salt, sugar, cork Mercury, iron, gold Oxygen, nitrogen, sulphur Milk, water, kerosene None 16. Which of the following objects do not sink in water? Coin and key Pencil and stone Silver ring and gold chain Leaf and ice None 17. Which of the following properties of gases makes water a vital component for aquatic animals? Diffusion Transparency Conductivity Solubility None 18. 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 a and b Both b and c Both c and a Only c None 19. Which of the following can be classified as hot, luminous and naturally occurring object(s)? Planet Moon Diamond Stars None 20. 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 blue green Yellow Black 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.
