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प्रश्न
Differentiate among opaque, translucent and transparent materials, giving one example of each.
उत्तर
| Opaque | Translucent | Transparent |
|
Opaque refers to a material that prevents an object from being seen at all. E. g. - wood, marble. |
Transculent is a material that allows an object to be viewed but not clearly. E. g. Butter paper, frosted glass. |
Transparent is a substance that allows an object to be seen plainly through it. E. g. Clean water, glass. |
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संबंधित प्रश्न
Short Answer Type Question:
What is the basis for sorting materials?
Chalk dissolves in water.
Sugar does not dissolve in water.
Vinegar dissolves in water.
Choose the odd one:
Choose the odd one:
Complete the crossword given in figure with the help of the clues.
Across
1. Which is generally hard, ductile, malleable and sonorous.
2. A metal is called so, it can be drawn into wires.
3. Metal bells are used because of this property.
Down
4. A metal generally used for making jewellery.
5. A metal which -is liquid at room temperature.
6. A metal which reacts with acid as f well as base to form hydrogen gas.
7. Substances used to enhance the growth of plants.
8. Property by virtue of which metals can be beaten into thin sheets.
Which pair of substances among the following would float in a tumbler half filled with water?
Which of the following materials is not lustrous?
lt was Paheli’s birthday. Her grandmother gave her two gifts made of metals, one old dull silver spoon and a pair of lustrous gold earrings. She was surprised to see the difference in the appearance of the two metals. Can you explain the reason for this difference?
