School Science Topics
School Science Topics
  • Видео 4
  • Просмотров 52 278
To show displacement reaction
Procedure:
Take five 100 ml beakers and label them A, B, C, D and E. Take about 50 ml of water in each beaker.
Dissolve in each beaker a teaspoonful of each substance as Indicated:
Beaker A : Copper sulphate (CuSO4) + Zinc granule (Zn)
Beaker B : Copper sulphate (CuSO4) + Iron nail (Fe)
Beaker C : Zinc sulphate (ZnSO4) + Copper turnings (Cu)
Beaker D : Iron sulphate (FeSO4) + Copper turnings (Cu)
Beaker E : Zinc sulphate (ZnSO4) + Iron nail (Fe)
Result: In beaker ‘A’ zinc (Zn) replaces copper (Cu) from copper sulphate (CuSO4).
In beaker ‘B’ Iron (Fe) replaces copper (Cu) from copper sulphate (CuSO4). We do not see any change in beaker C, beaker D and beaker E.
Conclusion:
Zinc is more rea...
Просмотров: 556

Видео

To test the nature of sulphur1:27To test the nature of sulphur
To test the nature of sulphur
Просмотров 46 тыс.4 года назад
Procedure: Take a small amount of powdered sulphur in a deflagrating spoon and heat it. As soon as sulphur starts burning, introduce the spoon into a gas jar. Cover the gas jar with a lid to ensure that the gas produced does not escape. Remove the spoon after some time. Add a small quantity of water into the gas jar and quickly replace the lid. Shake the gas jar well. Check the solution with re...
To test the nature of Rust0:53To test the nature of Rust
To test the nature of Rust
Просмотров 4 тыс.4 года назад
Procedure: Collect a spoonful of rust and dissolve it in a very little amount of water. The rust remains suspended in water. Shake the suspension well. Test the solution with red and blue litmus papers. Observation: The red litmus paper changes into blue. Conclusion: The solution is basic in nature.
Activity to prove that metals are good conductors of electricity1:00Activity to prove that metals are good conductors of electricity
Activity to prove that metals are good conductors of electricity
Просмотров 1,9 тыс.4 года назад
An activity to make an electric circuit to test whether electricity can pass through an object or not. Results: We can see that, when we take sulphur and coal, the bulb does not glow. But when we take iron nail and copper wire, the bulb glows. Conclusion: This proves that metals are good conductor of electricity and Non-metals are poor conductor of electricity.

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