1. What is capillary action?
A.
Movement of liquid through very narrow spaces
B.
Conversion of liquid into gas
C.
Breaking of water into hydrogen and oxygen
D.
Movement of solid particles in air
Correct Answer:
Movement of liquid through very narrow spaces
Explanation:
Capillary action is the movement of a liquid through narrow spaces or tubes, often against gravity.
2. Which property of water mainly helps it rise in a narrow glass tube?
A.
Adhesion to the glass surface
B.
Evaporation from the tube
C.
Freezing of water
D.
Release of oxygen
Correct Answer:
Adhesion to the glass surface
Explanation:
Water adheres to the walls of a narrow glass tube, helping it rise by capillary action.
3. In which type of tube is capillary rise generally greater?
A.
A very narrow tube
B.
A very wide tube
C.
A completely closed tube
D.
A tube filled with air only
Correct Answer:
A very narrow tube
Explanation:
Capillary action is stronger in narrow tubes, so liquid rises higher in them than in wider tubes.
4. Which example demonstrates capillary action in plants?
A.
Water rising through narrow spaces in stem tissues
B.
Leaves producing seeds
C.
Roots growing into soil
D.
Flowers changing color during pollination
Correct Answer:
Water rising through narrow spaces in stem tissues
Explanation:
Water can move upward through narrow spaces in plant tissues due partly to capillary action.
5. What happens when a thin glass tube is dipped into water?
A.
Water rises inside the tube
B.
Water changes immediately into ice
C.
Water moves only downward
D.
Water becomes a solid metal
Correct Answer:
Water rises inside the tube
Explanation:
Water rises in a thin glass tube because adhesion and cohesion produce capillary action.
6. Which combination is important for capillary action in water?
A.
Adhesion and cohesion
B.
Digestion and respiration
C.
Photosynthesis and transpiration only
D.
Fermentation and excretion
Correct Answer:
Adhesion and cohesion
Explanation:
Adhesion attracts water to the tube wall, while cohesion helps water molecules move together.
7. How does capillary action help a blotting paper absorb ink?
A.
Ink moves through tiny spaces in the paper
B.
Ink is converted into a gas
C.
Ink is chemically destroyed by the paper
D.
Ink freezes inside the paper
Correct Answer:
Ink moves through tiny spaces in the paper
Explanation:
The small spaces between fibers of blotting paper act like capillaries and draw in the ink.
8. Which material can absorb water through capillary action?
A.
Cotton cloth
B.
A smooth glass plate
C.
A solid metal block
D.
A dry plastic sheet
Correct Answer:
Cotton cloth
Explanation:
Cotton has many narrow spaces between its fibers, allowing water to move through it by capillary action.
9. In capillary action, water can move in a narrow space in which direction?
A.
Upward against gravity
B.
Only downward with gravity
C.
Only sideways in open air
D.
Only after becoming a gas
Correct Answer:
Upward against gravity
Explanation:
Capillary action can raise water in narrow tubes or spaces even against the force of gravity.
10. Which household item commonly shows capillary action when it absorbs spilled water?
A.
A paper towel
B.
A metal spoon
C.
A glass marble
D.
A ceramic plate
Correct Answer:
A paper towel
Explanation:
Paper towels contain tiny spaces between their fibers, allowing them to absorb water by capillary action.
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