Activity: Virtual Experiments Notes | EduRev

Science Class 10

Class 10 : Activity: Virtual Experiments Notes | EduRev

The document Activity: Virtual Experiments Notes | EduRev is a part of the Class 10 Course Science Class 10.
All you need of Class 10 at this link: Class 10

Activity: To study the different types of flames/presence of smoke.

Material required: Bunsen burner.

Procedure:
1. Light the bunsen burner.
Activity: Virtual Experiments Notes | EduRev

Fig: Lightening of bunsen burner

2. Close the air hole and observe the colour of the flame.
3. Put a metal plate over it and observe the nature of deposit.
4. Open the air regulator to allow flow of air.
5. Observe the colour of flame.
6. Put a metal plate and observe the nature of deposit.

Observation:

Activity: Virtual Experiments Notes | EduRevConclusion: Keep the air regulator open to get oxidising, non-sooty flame which has high temperature and does not lead to black deposits.

Activity: To study the reaction of ethanol with alkaline potassium permanganate.
Material required: Ethanol, alkaline KMnO4, test tube.

Procedure:
Take about 3 ml of ethanol in a test tube.
Add 5% solution of alkaline KMnO4 drop by drop into this solution.
Observe the colour of alkaline KMnOafter adding initially as well as finally.

Observation: The colour of KMnO4 gets discharged in the beginning. When excess of KMnO4 is added, the colour of KMnOdoes not disappear because whole of ethanol gets oxidised to ethanoic acid.
Activity: Virtual Experiments Notes | EduRev

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