Question

precaution 3 of melting point experiment of sample of pure organic compound
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Answer 1

Answer:

Keep the lower end of the capillary tube and the thermometer at the same level. 3. Packing of the powder should be uniform without any big air gaps in between the solid partices

Explanation:

You need to start by depositing the substance sample on the open end of the capillary tube while ensuring that its other end is entirely closed. Then invert the capillary tube and gently tap it. This way, the sample will end up at the bottom of the tube. Remember, the tap should be gentle, or it can cause trouble.