1. What is the general effect of a moderate increase in temperature on the rate of imbibition?
A.
It increases the rate of imbibition
B.
It completely stops imbibition
C.
It changes imbibition into diffusion
D.
It has no effect on imbibition
Correct Answer:
It increases the rate of imbibition
Explanation:
A moderate rise in temperature generally increases the rate of imbibition because the molecules move faster.
2. Why does imbibition usually occur faster at a higher temperature?
A.
Molecular movement increases
B.
Water becomes a solid
C.
The imbibant loses all attraction for water
D.
The surface area becomes zero
Correct Answer:
Molecular movement increases
Explanation:
Higher temperature increases molecular movement, helping water enter the imbibing material more rapidly.
3. At which temperature is the rate of imbibition generally greater, when other conditions are the same?
A.
25°C compared with 10°C
B.
10°C compared with 25°C
C.
0°C compared with 25°C
D.
The rate is always the same at every temperature
Correct Answer:
25°C compared with 10°C
Explanation:
Within a suitable range, imbibition is generally faster at 25°C than at 10°C because increased temperature promotes molecular movement.
4. What happens to the rate of water absorption by dry seeds during imbibition when temperature rises moderately?
A.
It usually increases
B.
It always becomes zero
C.
It decreases because water disappears
D.
It changes into salt absorption
Correct Answer:
It usually increases
Explanation:
A moderate rise in temperature generally speeds up the entry of water into dry seeds during imbibition.
5. Which condition would generally make imbibition slower?
A.
Low temperature
B.
Moderately warm temperature
C.
Increased molecular movement
D.
A suitable rise in temperature
Correct Answer:
Low temperature
Explanation:
Low temperature reduces molecular movement, so water generally enters an imbibing material more slowly.
6. The effect of temperature on imbibition is mainly related to a change in the:
A.
Kinetic energy of molecules
B.
Colour of the imbibant
C.
Number of chromosomes
D.
Shape of the nucleus
Correct Answer:
Kinetic energy of molecules
Explanation:
Temperature affects the kinetic energy of molecules; a moderate increase raises their movement and usually speeds up imbibition.
7. If two equal dry pieces of plant material are placed in water, which one will generally imbibe water faster?
A.
The piece kept at a moderately higher temperature
B.
The piece kept at a lower temperature
C.
The piece kept without any water
D.
Both pieces will always imbibe at exactly the same rate
Correct Answer:
The piece kept at a moderately higher temperature
Explanation:
A moderately higher temperature usually increases molecular movement and therefore increases the rate of imbibition.
8. Which statement about temperature and imbibition is correct?
A.
Imbibition generally becomes faster as temperature rises moderately
B.
Imbibition always becomes slower as temperature rises
C.
Temperature affects only the colour of the imbibant
D.
Imbibition can occur only at freezing temperature
Correct Answer:
Imbibition generally becomes faster as temperature rises moderately
Explanation:
Within a suitable temperature range, a moderate rise in temperature generally increases the rate of imbibition.
9. A student observes that seeds absorb water more slowly in a cold room. Which factor best explains this observation?
A.
Lower temperature reduces molecular movement
B.
Lower temperature removes the seeds' imbibing materials
C.
Lower temperature turns all water into vapour
D.
Lower temperature increases the surface area of the seeds to zero
Correct Answer:
Lower temperature reduces molecular movement
Explanation:
Cold conditions reduce molecular movement, causing the process of imbibition to proceed more slowly.
10. What is the usual effect of warming dry materials that are capable of imbibition, provided the temperature is not extreme?
A.
The rate of imbibition increases
B.
The materials can no longer absorb water
C.
The materials become impermeable immediately
D.
The process changes into photosynthesis
Correct Answer:
The rate of imbibition increases
Explanation:
Warming within a suitable range generally increases molecular movement and makes imbibition faster.
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