1.

Write down the uses and working principle of hot air oven.

Answer»

Use : Hot air oven is mainly used for the following purposes. 

1. Dry sterilization of syringes & needles. 

2. Preparation of anticoagulated bulbs. 

3. Drying of glass ware. 

4. Heating of chemicals used for the preparation of primary standards.

Principle: When electricity is passed through the heating coils, electrical energy is converted to heat energy.



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