Understanding Meniscus and Capillary Action

The video tutorial explains the concept of meniscus in liquids, focusing on the differences between concave and convex meniscus. It delves into the reasons behind these phenomena, highlighting the roles of adhesion and cohesion. The tutorial further explores capillary action, demonstrating how liquids can defy gravity in narrow tubes and its practical applications, such as in paper towels absorbing spills.

What is the shape of the water surface in a glass beaker due to the attraction between water and glass?

• Flat

• Convex

• Concave

• Irregular

Which type of meniscus is formed when mercury is placed in a glass container?

• Concave

• Flat

• Convex

• Irregular

What causes water to be more attracted to glass than to itself?

• Glass's transparency

• Water's temperature

• Glass's polarity

• Water's higher density

What term describes the phenomenon of water sticking to the walls of its container?

• Cohesion

• Adhesion

• Diffusion

• Osmosis

What is the term for the process where water climbs up a thin tube against gravity?

• Capillary Action

• Cohesion

• Adhesion

• Surface Tension

Why does water climb up a thin glass tube?

• Due to gravity

• Because of capillary action

• Because of evaporation

• Due to air pressure

What property of the glass tube is essential for observing capillary action?

• Polarity

• Transparency

• Non-polarity

• Thickness

Which everyday item demonstrates capillary action when it absorbs liquid?

• Paper towel

• Plastic bag

• Glass bottle

• Metal spoon

What happens when a paper towel is held vertically over a spill?

• The liquid evaporates

• The liquid is absorbed

• The liquid remains still

• The liquid spills over

What is the main reason water is absorbed into the small gaps of a paper towel?

• Evaporation

• Capillary action

• Condensation

• Gravity