Which of the following statements about water is FALSE?

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

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

(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.