1.

How will you wash test- tubes and conical flasks in the laboratory?

Answer»

A little quantity of washing soda is put inside the test tubes and conical flasks.

Some lukewarm water is added to it. 

The inside of the test-tubes and conical flasks are brushed carefully using a brush. 

Then they are washed with running water. 

Finally they are rinsed with water and kept inverted in the test tube stands and allowed to dry.



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