Q.117 Botany ⭐ 360° Option Elimination Active

NEET 2021 Botany Question 117 Solution

Topic: Transport in Plants · Official NTA Booklet Code M1

Question

Match List - I with List - II. (a) Cohesion (i) More attraction in liquid phase (b) Adhesion (ii) Mutual attraction among water molecules (c) Surface tension (iii) Water loss in liquid phase (d) Guttation (iv) Attraction towards polar surfaces List - I List - II Choose the correct answer from the options given below. (a) (b) (c) (d)

(1)(ii) (iv) (i) (iii)
(2)(iv) (iii) (ii) (i)
(3)(iii) (i) (iv) (ii)
(4)(ii) (i) (iv) (iii)

✓

Verified Against NTA Final Answer Key

Option (1) : (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)

📚 Transport in Plants Easy

📋 Given Parameters & Problem Setup

List I (a) Cohesion, (b) Adhesion, (c) Surface tension, (d) Guttation

List II (i) More attraction in liquid phase, (ii) Mutual attraction among water molecules, (iii) Water loss in liquid phase, (iv) Attraction towards polar surfaces

⚡

The 30-Second Exam Hall Shortcut: ⚡ Cohesion = Water-Water (ii) & Adhesion = Water-Polar Surface (iv)

⏱️ Save ~20 seconds

Cohesion is mutual attraction between water molecules (a-ii); Adhesion is attraction of water to tracheary polar wall surfaces (b-iv); Surface tension is higher attraction in liquid vs gas phase (c-i); Guttation is liquid water exudation via hydathodes (d-iii). Matches Option (1)!

1 Cohesion: Mutual attraction among like water molecules

\implies

(a)-(ii).

2 Adhesion: Attraction of water molecules to polar tracheary surfaces

\implies

(b)-(iv).

3 Surface tension: Water molecules are attracted to each other more in the liquid phase than in the gaseous phase

\implies

(c)-(i).

4 Guttation: Loss of water in liquid phase from hydathodes

\implies

(d)-(iii).

5 Match Option (1).

🛡️

Why You Can 100% Trust This Shortcut: Canonical NCERT Transport in Plants on Water Properties and Transpiration Pull.

📐

Step-by-Step Rigorous Workflow & Mathematical Proof

Step 1

Definition of Physical Forces in Sap Ascent

The cohesion-tension-transpiration pull model relies on three fundamental physical properties of water plus root pressure exudation:

\begin{aligned} \text{(a) Cohesion} & \longleftrightarrow \text{(ii) Mutual attraction among water molecules} \\[3pt] \text{(b) Adhesion} & \longleftrightarrow \text{(iv) Attraction of water molecules towards polar surfaces} \\[3pt] \text{(c) Surface tension} & \longleftrightarrow \text{(i) More mutual attraction in liquid phase than in gas phase} \\[3pt] \text{(d) Guttation} & \longleftrightarrow \text{(iii) Water loss in liquid phase through hydathodes due to root pressure} \end{aligned}

Step 2

Verification of Option Key

Evaluating the match: (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii) aligns precisely with Option (1).

⭐

360° Option Elimination Engine Key Feature

Diagnose every choice: Know exactly why the right option works and why distractors fail.

4-Option Deep Scan

1 1

✓ 100% Correct

Verdict & Scientific Reason:

Completely accurate textbook mapping for all 4 water relation properties.

💡

Why this is airtight: None. Clear first-principles match.

2 2

✗ Incorrect

Verdict & Scientific Reason:

Mismatches Cohesion with polar surfaces (which is adhesion) and Adhesion with guttation.

⚠️

Student Fallacy (Why candidates pick this trap): Swapping Cohesion and Adhesion definitions.

3 3

✗ Incorrect

Verdict & Scientific Reason:

Incorrectly assigns liquid loss (guttation) to cohesion.

⚠️

Student Fallacy (Why candidates pick this trap): Gross misalignment of water properties.

4 4

✗ Incorrect

Verdict & Scientific Reason:

Mismatches Adhesion with surface tension and Surface tension with adhesion.

⚠️

Student Fallacy (Why candidates pick this trap): Inverting adhesion and surface tension.

⚠️

NTA Trap Alert: Cohesion vs Adhesion Target Distinction

Cohesion is attraction between identical molecules (water-water); Adhesion is attraction between dissimilar substances (water-xylem cell wall).

🛡️ How to avoid the -1 mark: Remember: Cohesion = Together (water to water); Adhesion = Adhesive tape sticking to other surfaces (water to polar walls).

📖

Core NEET Syllabus Standard

NEET / NCERT Biology · Transport in Plants Standard Benchmark

Core Scientific Principle Tested:

"Cohesion is mutual attraction between water molecules; Adhesion is attraction to polar surfaces; Surface tension is greater attraction in liquid phase; Guttation is liquid water loss."

Syllabus Focus: Transpiration Pull & Properties of Water

✓ Core NEET UG Syllabus Anchor Syllabus & Academic Standards ↗

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NEET 2021 Botany Question 117 Solution

Question

The 30-Second Exam Hall Shortcut: ⚡ Cohesion = Water-Water (ii) & Adhesion = Water-Polar Surface (iv)

Step-by-Step Rigorous Workflow & Mathematical Proof

Definition of Physical Forces in Sap Ascent

Verification of Option Key

360° Option Elimination Engine Key Feature

NTA Trap Alert: Cohesion vs Adhesion Target Distinction

Core NEET Syllabus Standard

Ready to attempt under real exam pressure?

🔗 Related Questions — Transport in Plants

Transpiration Pull Physics and Evaporative Cooling

Active Transport Across Biological Membranes

Physical Properties of Water in Transpiration and Guttation

Root Pressure and Guttation via Hydathodes

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