Question

State two precautions required to ensure accurate results for finding the melting point of a solid

Answer 1

Answer:

The melting point of an organic solid can be determined by introducing a tiny amount into a small capillary tube, attaching this to the stem of a thermometer centred in a heating bath, heating the bath slowly, and observing the temperatures at which melting begins and is complete.

Answer 2

Answer:

1. The lower end of capillary tube and thermometer should be at same level.

2. The powdwered substance should be uniformly filled in tube so that their is no air gaps.