Advertisements
Advertisements
प्रश्न
Pick one material from the following which is completely soluble in water.
विकल्प
Chalk powder
Tea leaves
Glucose
Sawdust
उत्तर
Glucose
Explanation -
Glucose is completely soluble in water.
APPEARS IN
संबंधित प्रश्न
Very Short Answer Type Question:
What is common between salt and sand?
Short Answer Type Question:
What is the reason for grouping materials?
Look at the pictures and identify the materials by which they are made of:
(paper, clay, glass, wood, plastic, metal rubber, wax
 |
|
 |
|
 |
| ____________ | ____________ | ____________ | ___________ | _____________ |
 |
 |
 |
 |
 |
| ____________ | ____________ | ____________ | ____________ | ____________ |
Test the flexibility.
Give one plastic scale and a wooden scale to the students. Ask them to bend. Tabulate their observation (bends, does not bend).
| Plastic Scale | Wooden Scale |
| ______ | ______ |
Sand settles down in the water.
Choose the odd one:
Some of the following statements are incorrect. Find the incorrect statements and correct them.
- The property of metals by virtue of which they can be drawn into wires is called ductility.
- Metals are good conductors of electricity but poor conductor of heat.
- Articles made up of metals produce ringing sound when struck hard.
- Oxides of non-metals and metals are acidic in nature.
- A less reactive metal displaces a more reactive metal from its salt solution in water.
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.
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 of the following materials is not lustrous?
