What is the only physical difference between heavy water and pure water?

heavy water has greater density
heavy water is radioactive
heavy water is not translucent
heavy water conducts electricity
Heavy water contains deu­teri­um instead of common hy­dro­gen-1. In its pure form it has a density about 11% greater than water, but oth­er­wise, it is phys­i­cal­ly and chem­i­cal­ly similar. It is not ra­dioac­tive. Because of greater density and stronger hy­dro­gen-oxy­gen bonds, its behavior is slightly dif­fer­ent in some bio­chem­i­cal re­ac­tion­s. It may be toxic, but only when a large fraction of water (> 50%) in higher or­gan­isms is replaced by heavy water.

Answers distribution

heavy water has greater density
heavy water is radioactive
heavy water is not translucent
heavy water conducts electricity
answers
flagFinland
94%
1%
1%
2%
78
flagItaly
90%
3%
3%
2%
81
flagthe United Arab Emirates
87%
5%
3%
3%
56
flagthe Netherlands
81%
8%
3%
6%
81
flagGreece
79%
10%
10%
0%
29
flagFrance
74%
12%
2%
12%
50
flagGermany
73%
9%
4%
10%
296
flagMalaysia
73%
11%
7%
7%
26
flagthe United Kingdom
71%
11%
6%
9%
736
flagAustralia
67%
8%
10%
10%
49
flagthe Philippines
67%
10%
7%
15%
40
flagPoland
65%
12%
8%
12%
19872
flagNorway
63%
12%
10%
14%
49
flagCzech Republic
63%
18%
0%
18%
22
flagRepublic of Ireland
62%
16%
4%
16%
67
flagPakistan
62%
15%
11%
9%
51
flagthe United States
59%
15%
8%
14%
1018
flagUnknown
55%
11%
14%
18%
815
flagIndia
55%
12%
9%
19%
475
flagCanada
51%
14%
12%
19%
62

Gender

men66%
women66%
heavy water has greater density
66%
66%
heavy water is radioactive
12%
10%
heavy water is not translucent
8%
9%
heavy water conducts electricity
12%
13%

Language versions

question
answers
results
flag
What is the only physical difference between heavy water and pure water?
2359
58%

Details

Author: globalquiz.org
Illustration: Jinx!
tools
Should this question be improved? Improve it.
Globalquiz questions are translated by users for other users. Translate this question.