Ncert – class 6- science – Chapter 2: Sorting Materials and Groups Welcome to your Ncert - class 6- science - Chapter 2: Sorting Materials and Groups 1. Why metals lose their shine over a period of time? Because of air and moisture Because of coming in contact with other metals Because of the action of pollens in the air Because of being kept covered None 2. What is the criterion for choosing a material to make an object? Properties of the material only Nature and colour of the material only Purpose of the object only Both properties of the material and purpose of the object None 3. You are provided with the following four materials like wood, plastic, wool, and steel. Which of the given material will you identify as hardest and softest respectively? Steel and wool Plastic and steel Wool and steel Wood and wool None 4. Select the objects which are opaque. soil, sand and dust marvel, oiled paper and magnet glass, grass and gum water, oil and soil None 5. Which of the following type of bodies form sharp shadows when placed in the path of light? Both A and B Translucent Opaque Transparent None 6. Iron, copper and gold appear different but still have similarities". This statement is justified by which of the following statements? They are metallic and lustrous. None 7. During the formation of rain, when water vapour changes back to liquid in the form of rain drops: heat is released heat is absorbed there is no exchange of heat heat is first absorbed and then released None 8. What do you call a substance through which things are partially visible? Lustrous object Translucent object Transparent object Opaque object None 9. Which of the following substances are not types of raw material? Soil, leather, metal Glass, cotton, steel Books, belt, newspaper Wood, paper, plastic None 10. A vendor sells white powdered salt mixed with white powdered stone. The knowledge of which property will help you detect this malpractice? Density Solubility Opacity Ductility None 11. Translucent substance __________. does not allow the light to pass through it allows light to pass through it completely allows light to pass through it partially None of these None 12. Which of the following properties of materials is not considered during classification? Transparency Conductivity Solubility Mass None 13. Which of the following is lustrous? Wooden furniture Football Plastic chair Steel furniture None 14. Most rubber bands and tyres are made of rubber. This is because rubber is: cheap an electrical insulator elastic and strong naturally available None 15. Name two transparent materials. Plastic and cold wax Water and honey Glass and wood Plastic and glass None 16. Which of the following objects are generally made from leather? All of the above Bags Shoes Belts None 17. How many of the following are soluble in water?salt, sugar, sand, dust 4 3 2 1 None 18. Light cannot pass through a cardboard. What kind of object is it? Woody Translucent Hard Opaque None 19. A few substances are arranged in order of increasing force of attraction between their particles. Which one of the following represents a correct arrangement? Air, Milk, Sugar Sugar, Milk, Air Air, Sugar, Milk Milk, Sugar, Air None 20. Cart, wheels and plough these materials are made up of : wood plastic None of these metal 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.
