Question

Which one of the following statements about water is FALSE ?

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

Answer 1

The correct option is C There is extensive intramolecular hydrogen bonding in the condensed phase.

Water possesses intermolecular hydrogen bonding in the condensed phase rather than intramolecular hydrogen bonding. Therefore, statement (c) is incorrect

(d). Since, heavy water is heavier than normal water, ice formed by heavy water sinks in normal water.

(b) Water acts as a Bronsted acid as well as a Bronsted base.

(a) Photosynthesis reaction,
$6C{O}_2+6H_{2}O\to C_6{H}_{12}{O}_6+6O_2$

Hence, option (c) is correct answer.