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प्रश्न
Write the properties of this substance.
Chalk
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उत्तर
- Chalk is a solid material.
- It is not soluble in water.
- Brittleness is a characteristic of chalk.
- When subjected to pressure, chalk disintegrates into fine particles.
संबंधित प्रश्न
Write the properties of this substance.
Sugar
Write the properties of this substance.
Flour
What is it made from? Why?
A screwdriver
Why does this happen?
The fragrance of incense sticks lighted in one corner of a room spreads to the other corner.
Short Answer Type Question:
Metals have lustre (shine). Give the reason why some metal articles become dull and loose their shine.
Find the odd one out from the following:
Materials which can be drawn into wires are called ductile. Which of the following is not a ductile material?
Which among the following materials would you identify as soft materials and why?
Ice, rubber band, leaf, eraser, pencil, pearl, a piece of wooden board, cooked rice, pulses and fresh chapati.
During summer holidays, a group of children collected a lump of salt, green grass, broken glass piece, a small thermocol box, pen, iron nail, glass marbles, hair, naphthalene ball, a piece of sugar candy (mishri) and tried to group them on the basis of properties given in table below. Help them in filling the table.
| Name of the material |
Appearance (Hard/Soft) |
Transparency (Transparent/ Translucent/ Opaque) |
Floats/ Sinks in water |
Soluble/ Insoluble in water |
Chalk, iron nail, wood, aluminium, candle, cotton usually look different from each other. Give some properties by which we can prove that these materials are different.
