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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
Why does this happen?
The fragrance of incense sticks lighted in one corner of a room spreads to the other corner.
Very Short Answer Type Question:
Write two substances which are made from leather.
Short Answer Type Question:
Write any four properties of materials.
Short Answer Type Question:
Metals have lustre (shine). Give the reason why some metal articles become dull and loose their shine.
Short Answer Type Question:
Name the naturally occurring hardest substance known.
Long Answer Type Question:
Describe an experiment to prove that water is transparent.
Long Answer Type Question:
Write an experiment to show that our palm is translucent.
Find out the names of three metals and three non-metals from the box given as figure.
You are provided with the following materials
- Magnifying glass
- Mirror
- Stainless steel plate
- Glass tumbler
Which of the above materials will you identify as 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.
