Question

Which of the following statements about water is FALSE?

• A. There is extensive intramolecular hydrogen bonding in the condensed phase.
• B. Ice formed by heavy water sinks in normal water.
• C. Water is oxidized to oxygen during photosynthesis
• D. Water can act both as an acid and as a base

Answer 1

Answer: (A)

(i) Ice formed by heavy water sinks in normal water due to higher density of $D_{2}O$ than normal water.

(ii) $6{\text{CO}}_2+6{\text{H}}_2\text{O}{\to }_{\text{chlorophyll}}^{\text{hv}}{\text{C}}_{\text{6}}{\text{H}}_{\text{12}}{\text{O}}_{\text{6}}{\text{+6O}}_{\text{2}}$

(iii) Water can show amphiprotic nature and hence water can act both as an acid a base.



(iv) There is extensive intermolecular hydrogen bonding in the condensed phase instead of intramolecular H - bonding.