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प्रश्न
Write an answer to the following question in your own words.
Which precaution will you take while using the methods of distillation and separation by separating funnel?
उत्तर
- Precautions to be used during distillation:
- The apparatus should be set in a proper manner with all the components fitted well.
- Never heat the system that is totally closed from the outside atmosphere to prevent an explosion.
- Add boiling chips to reduce bumping (rapid boiling causing the liquid to expel out of the container).
- Control the rate of heating so as not to overheat to avoid bumping.
- Precautions to be used while using the separating funnel for separation:
- The funnel should be tightly fixed to the stand in an erect position.
- The liquid in the funnel should be left undisturbed to allow it to separate.
- The stopper should be removed carefully without disturbing the setup.
संबंधित प्रश्न
How would you confirm that a colourless liquid given to you is pure water?
Define :- Distillation
How is distillation more advantageous than evaporation?
On what principle are the following methods of separation based? Give one example of a mixture for each of the methods mentioned in which they are used
Fractional distillation :
Give one word answer
The liquid which evaporates and then condenses during the process of distillation
Write an answer to the following question in your own words.
Where are the methods of separation by distillation and by separating funnel used? Why?
State the correct technique for the separation of the following mixture.
a low boiling point liquid from a high boiling point liquid.
What will happen if the upper outlet of the condenser is connected to the tap instead of the lower outlet?
What is the difference between simple distillation and fractional distillation?
Match the type of mixture of compounds in Column I with the technique of separation/purification given in Column II.
| Column I | Column II |
| (i) Two solids which have different solubilities in a solvent and which do not undergo reaction when dissolved in it. | (a) Steam distillation |
| (ii) Liquid that decomposes at its boiling point | (b) Fractional distillation |
| (iii) Steam volatile liquid | (c) Simple distillation |
| (iv) Two liquids which have boiling points close to each other | (d) Distillation under reduced pressure |
| (v) Two liquids with large difference in boiling points. | (e) Crystallisation |
