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प्रश्न
Higher Order Thinking Skills.
Aakash noticed that the metal latch on gate was difficult to open during hot sunny days. However, it was not difficult to open the same latch at night. Aakash observed that the latch and the gate are exposed to the sun during day time.
- Formulate a hypothesis based on the information provided.
- Briefly state how you would test the hypothesis.
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उत्तर
- Solids (Iron) expand on heating and contract on cooling. This causes the volume to matter of increase during heating or expansion, the mass of matter does not change.
- During heating the distance between the particles of the iron latch change. In an iron latch the distance between the iron particles increases when they gain enough heat. So during hot days the latch on the gate was difficult to open. At night, because of cooling the distance between the particles decreases. So at night it was not difficult to open the latch on the gate
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संबंधित प्रश्न
What is an amalgam?
How are the properties of an alloy different from those of the constituent elements?
Give reasons
Magnesium is used in fire works.
State two important uses of following metal:
Uses of silver
State two important uses of following metals:
Uses of iron
Why are alkali metals kept in kerosene oil?
An element which is always lustrous, malleable and ductile is ______.
Which of the following two combinations are correct?
| Metal | Gas Evolved | |
| (i) | Copper | Yes |
| (ii) | Iron | Yes |
| (iii) | Magnesium | No |
| (iv) | Zinc | Yes |
A doctor prescribed a tablet to a patient suffering from iron deficiency. The tablet does not look like iron. Explain.
The liquid metal at room temperature ______.
