In this post, you will learn a complete explanation of activity 1.1 class 10 NCERT Science that belongs to Chapter 1 Chemical Reactions and Equations. You can also go through activity 1.2 of Chapter 1 Chemical Reactions and Equations.
Explain
Activity 1.1 Class 10 Science
Caution: This activity
needs the teacher’s assistance. It would be better if students wear eye
protection.
Activity - Clean a
magnesium ribbon about 2 cm long by rubbing it with sandpaper.
· Hold
it with a pair of tongs. Burn it using a spirit lamp or burner and collect the
ash so formed in a watch glass as shown in the figure, Burn the magnesium ribbon
keeping it as far as possible from your eyes.
· What
do you observe?
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Explain Activity 1.1 Class 10 NCERT Science |
Observation:
Magnesium ribbon burns with a dazzling white light and changes into a white
powder. The white powder is magnesium oxide.
Conclusion:
It is clear that Mg burns and changes into a new substance of a new state, which
is magnesium oxide (MgO).
MgO is formed by the reaction of magnesium with oxygen present in the air.
2Mg + O2 → 2MgO
Watch the Video to understand Activity 1.1 Class 10 Science
MCQ Quiz for Activity 1.1 Class 10 Science
Queries based on Activity 1.1Class 10 Science
1. Why magnesium ribbon is
cleaned before burning?
Ans.- When magnesium ribbon remains in the air, it gets
covered with a layer of magnesium oxide, so this layer should be removed before
burning.
2. Give the
chemical name of the white powder obtained?
Ans.- Magnesium
oxide [MgO]
3. Write the
chemical reaction when magnesium burns?
Ans- 2Mg + O2 →2MgO
Related Topics for you
1. Activity 1.2 Class 10 Science
2. Solution of Chemical Reactions and Equations
4. Extra Questions of Chapter 1
5. How to balance a chemical equation
6. What happens during a chemical reaction
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