Question

5. Why should the capillary be cleaned every time before use?​

Answer 1

The rise of water in a thin tube inserted in water is caused by forces of attraction between the molecules of water and the glass walls and among the molecules of water themselves. ... The narrower the bore of the capillary tube, the higher the water rises

Answer 2

$\huge\underline\purple{answer}$

The rise of water in a thin tube inserted in water is caused by forces of attraction between the molecules of water and the glass walls and among the molecules of water themselves. ... The narrower the bore of the capillary tube, the higher the water rises.