Activity 2.8 NCERT Class 9 Science Is Matter Around Us Pure
In this
post, you will find NCERT Science Class 9 Chapter 2 Activity solutions. In
Class 9 science chapter 2 Is Matter Around Us Pure consists of NCERT Activity
2.8 Class 9 Science Explanation with a conclusion.
Activity
2.8 NCERT Class9 Science Is Matter Around Us Pure
You are
suggested to study NCERT activity 2.8 class 9 science Is matter around us pure
explanation with a conclusion so that you can attempt questions based on the
activity 2.8 class 9 science. Activity 2.8 class 10 science will be very useful
for you.
Activity
2.8 Class 9 Science
·
Let us try to separate acetone and water from their mixture.
·
Take eh mixture into a distillation flask. Fit it with a thermometer.
·
Arrange the apparatus.
·
Heat the mixture slowly keeping a close watch at the thermometer.
·
the acetone vaporizes, condenses in the condenser, and can be collected from
the condenser outlet.
·
Water is left behind in the distillation flask.
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| Distillation Method |
Answer the
following questions
i.
What do you observe as you start heating the mixture?
ii.
At what temperature does the thermometer reading become constant for
some time?
iii.
What is the boiling point of acetone?
iv.
Why do the two components get separated?
Observation
Acetone is
a volatile liquid and has a low boiling point so on heating the mixture, acetone vaporizes
first and on cooling, it gets converted into liquid form.
Explanation
This method
is known as distillation. It is used to separate the components of a mixture containing
two miscible liquids having differences in their boiling points.
In this method,
the component that has a low boiling point gets vaporized first and separated.
Conclusion
The distillation method is used to separate mixtures of
two miscible liquids.
Answer the
above questions
i.
The vapours of the liquid with a low boiling point(i.e. acetone) are formed
first.
ii. Thermometer reading became constant at 56℃.
iii. Boiling point of acetone is 56℃.
iv.
The
two components get separated due to the difference between the boiling points of both
liquids.
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