Question

Heavy water is called as heavy because it:

• A. is denser than common water
• B. is an oxide of deuterium
  
• C. has a heavy or bad test
  
• D. none of these
  

Answer 1

Answer: (B)

is an oxide of deuterium

Heavy water in which deuterium, a heavy isotope of hydrogen, takes the place of hydrogen. Heavy water has physical and chemical properties that are like those of ordinary water, but heavy water is 10 percent heavier and has higher freezing and boiling points.

Hence, option B is correct.