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The wettability of a surface by a liquid depends primarily on - Physics

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प्रश्न

The wettability of a surface by a liquid depends primarily on

विकल्प

  • viscosity

  • surface tension

  • density

  • angle of contact between the surface and the liquid

MCQ
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उत्तर

angle of contact between the surface and the liquid

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  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 7: Properties of Matter - Evaluation [पृष्ठ ९१]

APPEARS IN

सामाचीर कलवी Physics - Volume 1 and 2 [English] Class 11 TN Board
अध्याय 7 Properties of Matter
Evaluation | Q I. 14. | पृष्ठ ९१

संबंधित प्रश्न

Explain why Water on a clean glass surface tends to spread out while mercury on the same surface tends to form drops. (Put differently, water wets glass while mercury does not.)


A uniform vertical tube of circular cross section contains a liquid. The contact angle is 90°. Consider a diameter of the tube lying in the surface of the liquid. The surface to the right of this diameter pulls the surface on the left of it. What keeps the surface on the left in equilibrium?


An ice cube is suspended in vacuum in a gravity free hall. As the ice melts it


A u-tube is made up of capillaries of bore 1 mm and 2 mm respectively. The tube is held vertically and partially filled with a liquid of surface tension 49 dyne/cm and zero angles of contact. Calculate the density of the liquid, if the difference in the levels of the meniscus is 1.25 cm. take g = 980 cm/s 


Define the angle of contact for a given pair of solid and liquid.


A molecule of water on the surface experiences a net ______.


Two mercury droplets of radii 0.1 cm. and 0.2 cm. collapse into one single drop. What amount of energy is released? The surface tension of mercury T = 435.5 × 10–3 Nm–1.


The sufrace tension and vapour pressure of water at 20°C is 7.28 × 10–2 Nm–1 and 2.33 × 103 Pa, respectively. What is the radius of the smallest spherical water droplet which can form without evaporating at 20°C?


A soap film of surface tension 3 × 10-2 formed in a rectangular frame can support a straw as shown in Fig. If g = 10 ms-12, the mass of the straw is ______.


A liquid drop of density ρ is floating half immersed in a liquid of density d. The diameter of the liquid drop is ______.

(ρ > d, g = acceleration due to gravity, T = surface tension)


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