Water molecules are highly polar. The polar end of a molecule attracts opposite charges on another water molecule (acting like a magnet). How would you explain this property of water with reference to the upward movement of water? Comment on the upward movement of water given the intermolecular hydrogen bonding in water.

Vedclass pdf generator app on play store
Vedclass iOS app on app store
(N/A) $\Rightarrow$ The polarity of water molecules leads to strong cohesive forces (attraction between water molecules) and adhesive forces (attraction between water molecules and the surfaces of xylem vessels).
$\Rightarrow$ The upward movement of water is facilitated by these properties:
$(i)$ Cohesion: Mutual attraction between water molecules due to hydrogen bonding,which resists the downward pull of gravity.
$(ii)$ Adhesion: Attraction of water molecules to the polar surfaces of tracheids and vessel elements,which helps water climb against gravity.
$(iii)$ Capillarity: The ability of water to rise in narrow tubes (like xylem) due to the combined effect of cohesion,adhesion,and surface tension.
$\Rightarrow$ Intermolecular hydrogen bonding ensures that water remains a cohesive liquid column,allowing it to be pulled upward through the xylem under tension generated by transpiration.

Explore More

Similar Questions

According to capillarity theory, . . . . . . alone causes ascent of sap in plants.

Which is not true for root pressure?

Which of the following forces plays a very important role in the ascent of sap in plants?

The continuous excretion of watery substance from the stump of a well-watered pot plant after cutting off the shoot slightly above the base is due to:

The rate of upward movement of water through the xylem in plants can be up to $..........$.

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo