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प्रश्न
Write the properties of this substance.
Coal
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उत्तर
- Coal is a hard substance.
- It is a fossil fuel that is readily combustible.
- It serves as an energy source.
- It is characterized by the predominant presence of carbon.
संबंधित प्रश्न
Write the properties of this substance.
Chalk
Write the properties of this substance.
Ink
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:
Why is a tumbler not made with a piece of cloth?
Short Answer Type Question:
Kerosene, coconut oil, mustard oil do not dissolve in water, even on shaking. They separate after sometime forming two different layers. Explain why.
Long Answer Type Question:
Describe an experiment to prove that water is transparent.
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 |
Arrange the jumbled words to arrive at the appropriate name of material and also write two uses of it.
soekrnee
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.
