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प्रश्न
Describe simple experiments to prove that gases have mass.
उत्तर
Have mass
Experiment:
An inflated balloon placed on one side of the scale causes it to tilt towards one side.
Conclusion: The scale tilts due to the mass of the gas, hence all gases have mass.
संबंधित प्रश्न
Give two reasons for saying that wood is a solid.
Give reasons
We can walk through air.
Fill in the blanks:
______ and ______ can flow.
Fill in the blanks:
The physical state of a substance, which has neither fixed volume nor fixed shape is a ______.
State the property of the following substance.
Sodium nitrate is soluble in water, but calcium carbonate is not.
State the property of the following substance.
Manganese dioxide, a catalyst which alters the rate of a chemical reaction is black in colour.
Strainer is a kind of sieve which is used to separate a liquid from solid.
Match the following.
| Srl. no. | A | B | C |
| i | Separation of visible undesirable components | Water mixed with chalk powder | Magnetic Separation |
| ii | Separation of heavier and lighter components | Sand and water | Decantation |
| iii | Separation of insoluble impurities | Iron impurities | Filtration |
| iv | Separation of magnetic components from non-magnetic components | Rice and stone | Hand-picking |
| v | Separation of solids from liquids | Husk and paddy | Winnowing |
Distinguish the properties of solid, liquid, and gas. Draw a suitable diagram.
Solids are compressible.
