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.
Material Required
The following materials are used in this activity
1. Magnesium ribbon
2. Spirit lamp or burner
3. Sandpaper
4. Watch glass
5. Tongs
6. Eye protector
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?
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
3. Write the
chemical reaction when magnesium burns?
Ans- 2Mg + O2 →2MgO
4.. Why
is it recommended to hold the magnesium ribbon with a pair of tongs?
Ans – Magnesium ribbon is burnt in the flame so to
avoid any hazard to hand, we should hold the magnesium ribbon with a pair of
tongs.
5. Why is it recommended to protect your eyes during the experiment?
Ans. During the
activity, we burn the magnesium ribbon in spirit lamp or Bruner. There may be
eye injury from the intense light so we must protect our eyes with eye
protector.
6.
What do you observe during the burning of magnesium ribbon?
Ans – we can see a white dazzling light during the burning
of magnesium ribbon and a white powder in the watch glass.
7. What
type of chemical reactions take place during the burning of the magnesium ribbon?
Ans - Magnesium ribbon reacts with oxygen during burning
and form a white powder named magnesium oxide. It is a combination reaction.
8. Write
the chemical equation of the reaction during the magnesium ribbon.
Ans – 2Mg + O2 →2MgO
9. What
is the chemical formula of the white powder collected in the watch
glass during this activity?
Ans – MgO
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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