Statements about heavy water are given below
A. Heavy water is used in exchange reactions for the study of reaction mechanisms
B. Heavy water is prepared by exhaustive electrolysis of water
C. Heavy water has higher boiling point than ordinary water
D. Viscosity of $H _{2} O$ is greater than $D _{2} O$
To determine the correct statement(s) about heavy water, let's evaluate each given statement:
Statement A: Heavy water is used in exchange reactions for the study of reaction mechanisms.
This statement is true. Heavy water (D_2O) is often used in research to study reaction mechanisms through isotope exchange reactions. Deuterium (D) can replace protium (H) in a reaction, enabling scientists to trace and study reaction pathways.
Statement B: Heavy water is prepared by exhaustive electrolysis of water.
This statement is true. Heavy water is typically produced through the exhaustive electrolysis of ordinary water, where light hydrogen (H_2) is preferentially removed, leaving behind deuterium.
Statement C: Heavy water has a higher boiling point than ordinary water.
This statement is true. Due to the presence of deuterium, heavy water does indeed have a higher boiling point (101.4 °C) compared to ordinary water (100 °C).
Statement D: Viscosity of H_2O is greater than D_2O.
This statement is false. In fact, the viscosity of heavy water is greater than that of ordinary water. The presence of deuterium increases the intermolecular forces, leading to higher viscosity.
Based on the analysis, the statements that are correct are A, B, and C. Therefore, the correct answer is:
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