Match List - I with List - II.
| |
List-I | |
List-II |
| (a) | Cohesion | (i) | More attraction in the liquid phase |
| (b) | Adhesion | (ii) | Mutual attraction among water molecules |
| (c) | Surface tension | (iii) | Water loss in the liquid phase |
| (d) | Guttation | (iv) | Attraction toward polar surfaces |
Choose the correct answer from the options given below.
Correct Answer :
(a) - (ii) , (b) - (iv), (c) - (i) , (d) - (iii)
Solution :
The correct option is (a) - (ii), (b) - (iv), (c) - (i), (d) - (iii).
To find the correct match, let us understand the definition and physical properties of each term listed in List-I:
1. Cohesion: This is the mutual attraction among water molecules. Water molecules are attracted to one another due to hydrogen bonding. Thus, (a) matches with (ii).
2. Adhesion: This refers to the attraction of water molecules to polar surfaces, such as the walls of tracheids and xylem vessels. Thus, (b) matches with (iv).
3. Surface Tension: This property causes water molecules to be attracted to one another in the liquid phase more than to water in the gas phase, giving the liquid surface a stretched membrane-like behavior. Thus, (c) matches with (i).
4. Guttation: This is the process of water loss in its liquid phase (as droplets) from the margins of leaves through specialized structures called hydathodes, usually occurring at night or early morning under conditions of high humidity and root pressure. Thus, (d) matches with (iii).
Combining all the correct matches:
(a) Cohesion ⇒ (ii) Mutual attraction among water molecules
(b) Adhesion ⇒ (iv) Attraction toward polar surfaces
(c) Surface tension ⇒ (i) More attraction in the liquid phase
(d) Guttation ⇒ (iii) Water loss in the liquid phase
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