Question

Which one of the following statements about water is false?

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

Answer 1

Answer: (D)

(i) Ice formed by heavy water sinks in normal water due to higher density of $D_{2}O$ than normal water
(ii) $6C{O}_2+6H_{2}O\stackrel{hv\text{chlorophyll}}{\to }{C}_6{H}_{12}{O}_6+6O_2$
(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