A syringe is a hollow glass tube with lower end tapered to a nozzle. Due to which one of the following liquid can be drawn into a syringe?

The mechanism of drawing liquid into a syringe relies on the principle of pressure difference. When the plunger of a syringe is pulled outwards, the volume inside the glass tube increases, which causes the air pressure inside to drop, creating a partial vacuum [c1]. Atmospheric pressure acting on the surface of the liquid outside the syringe then forces the liquid through the nozzle and into the tube to equalize the pressure. While capillary action involves liquid rising in narrow tubes due to adhesive and cohesive forces [t2][t3], it is not the primary force responsible for filling a syringe, which can handle much larger volumes than those moved by capillarity alone. Similarly, surface tension and diffusion do not provide the necessary force to draw bulk liquid into the barrel against gravity or resistance [t7].

Sources

1. [1] Science ,Class VIII . NCERT(Revised ed 2025) > Chapter 7: Particulate Nature of Matter > Activity 7.6: Let us experiment > p. 107