Advertisements
Advertisements
प्रश्न
Differentiate among opaque, translucent and transparent materials, giving one example of each.
Advertisements
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. |
APPEARS IN
संबंधित प्रश्न
Very Short Answer Type Question:
Why do we need to group materials? Give one reason.
Short Answer Type Question:
Mention some materials which are made up of paper.
Short Answer Type Question:
What is the basis for sorting materials?
We cannot compress, cut or bend the rough materials easily.
Choose the odd one:
Differentiate hard and soft materials.
Match the substances in Column A with their applications given in Column B.
|
Column A |
Column B |
| (a) oxygen | (i) for making crackers |
| (b) copper | (ii) for disinfecting water |
| (c) sulphur | (iii) all living beings inhale during breathing |
| (d) iron | (iv) for making electric wires |
| (e) chlorine | (v) for making rails |
Complete the crossword given in the 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 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.
Boojho found a bag containing the following materials
- Mirror
- Paper stained with oil
- Magnet
- Glass spectacles
Help Boojho in finding out the material(s) which is/are opaque.
Which pair of substances among the following would float in a tumbler half filled with water?
