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प्रश्न
Write the properties of this substance.
Water
उत्तर
- Water is a liquid state.
- Properties of water are fluidity, density, solubility, transparency and thermal conductivity.
संबंधित प्रश्न
Give two reasons to justify water at room temperature is a liquid.
Why does a desert cooler cool better on a hot, dry day ?
One of the following does not undergo sublimation. This one is :
When heat is constantly supplied by a gas burner with small flame to melt ice, then the temperature of ice during melting :
Which of the following represent the suitable conditions for the liquefaction of gases ?
State the three effects of heat on matter
Name the phenomenon which causes the following changes:
Disappearance of camphor when exposed to air
A substance which can change its state
State whether the following statement is true or false. If false write the correct statement.
During a chemical change the composition of the original substance is not altered and the change is irreversible.
Prepare a model to demonstrate movement of particles in solids, liquids and gases.
For making this model you will need
- A transparent jar
- A big rubber balloon or piece of stretchable rubber sheet
- A string
- Few chickpeas or black gram or dry green peas.
How to make?
- Put the seeds in the jar.
- Sew the string to the centre of the rubber sheet and put some tape to keep it tied securely.
- Stretch and tie the rubber sheet on the mouth of the jar.
- Your model is ready. Now run your fingers up and down the string by first tugging at it slowly and then rapidly.
