The Question is from neet-botany plant-physiology , and it was created by the author B VENKAT

Question

Which of the following factors DOES NOT significantly affect the rate of imbibition?

B VENKAT · Accepted Answer

## CORE INFORMATION
✓ **Answer**: D
## CONCEPT FRAMEWORK
 **Primary Concept**: Imbibition
 **Related Topics**: Capillary action, surface tension, diffusion
 **Prerequisites**: Understanding of water potential, surface area, and the effects of temperature and pressure on molecular movement.
## SOLUTION PATHWAY
**Given Information**:
The question asks which factor does NOT significantly affect the rate of imbibition.
**Method & Steps**:
1. **Analyze each option:**
  Imbibition is the process by which a substance absorbs a liquid.  The rate of imbibition is affected by several factors.
2. **Temperature:** Higher temperatures increase the kinetic energy of the molecules, leading to faster diffusion and increased imbibition rate.
  Reasoning: Increased kinetic energy leads to faster movement of liquid into the imbibant.
3. **Affinity of the imbibant for the liquid:** The stronger the attraction between the imbibant and liquid (e.g., hydrophilic material and water), the faster the imbibition.
  Reasoning: Stronger attraction leads to faster uptake of the liquid.
4. **Surface area of the imbibant:** A larger surface area provides more contact points for the liquid to be absorbed, increasing the rate of imbibition.
  Reasoning: More contact points mean faster absorption.
5. **External hydrostatic pressure:** While pressure can influence the rate of liquid movement in general, it does not have a significant direct effect on the rate of imbibition itself compared to the other factors. The primary driving force for imbibition is the water potential gradient and the attractive forces between the imbibant and the liquid.
  Reasoning: Imbibition is primarily driven by the affinity between the imbibant and the liquid, not external pressure.
3. **Conclusion:**
  Result: External hydrostatic pressure is the factor that does not significantly affect the rate of imbibition.
  Verification:  The other factors directly influence the rate of diffusion and/or the attractive forces driving imbibition.
 ## OPTION ANALYSIS
A :x: Temperature increases kinetic energy, increasing imbibition rate.
B :x:  Affinity directly relates to the rate of imbibition; stronger affinity leads to faster imbibition.
C :x: Larger surface area provides more contact points for absorption, thus increasing the rate.
D ✓: External hydrostatic pressure has a minimal impact compared to the other factors influencing imbibition.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing imbibition with osmosis: Osmosis involves a semipermeable membrane, while imbibition does not.
   How to avoid: Understand the key differences between these processes.
  2.Overlooking the role of surface area:  Surface area plays a crucial role in determining the rate of imbibition.
   How to avoid: Consider the contact area between the imbibant and liquid.
 **Quick Tips**:
  1.Think about the forces driving imbibition (e.g., adhesion, cohesion).
  2.Remember that imbibition is primarily driven by the water potential gradient and the attractive forces between the imbibant and the liquid.

B VENKAT · Answer

Temperature

B VENKAT · Answer

Affinity of the imbibant for the liquid

B VENKAT · Answer

Surface area of the imbibant

B VENKAT · Answer

The correct Option is "External hydrostatic pressure"

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