Year 10

Why a small liquid drop is in spherical shape?

• due to surface tension

• due to low viscosity

• due to hydrogen bonding

Which of the following factors affect the Surface Tension?

• Nature of liquid

• Area of surface

• Both a and b

Which of the following intermolecular forces enables us to write on the blackboard with a chalk?

• Cohesive force

• Adhesive force

• Magnetic force

What is the unit of surface tension ?

• N/m

• Nm-2

• Nm

Which of the following is not based one the principle of capillarity

• Floating of wood on water surface

• Rise of oil in wick of lantern

• Soaking of ink by bloating paper

The action of water rising up the stem of a plant is due to

• Capilarity

• Surface tension

• Osmosis

The following are viscous liquids except

• Palm oil

• Engine oil

• Water

Which substance does not wet glass?

• Water

• Mercury

• Both water and mercury

Which substance wets glass?

• Mercury

• Water

• None of the above

The internal friction which exists between layers of a liquid or gas in motion.

• Surface Tension

• Capillarity

• Viscosity