If a wax coated capillary tube is dipped in water, then water in it will

The forces within the water molecules tend to become stronger than that of the water and the walls as a result of coating the interior of the capillary tube with wax. As a result, water can no longer soak the tube's sides, which prevents it from climbing the walls. As a result, due to forces of surface tension acting downward and the weight of the water, it has a tendency to decrease its level.