Which element is blue in liquid state?

hydrogen

nitrogen

oxygen

helium

Liquid oxygen has a pale blue color and is strongly paramagnetic. The first measurable quantity of liquid oxygen was produced by Polish professors Zygmunt Wróblewski and Karol Olszewski (Jagiellonian University in Kraków) on April 5, 1883.

wikimedia wikipedia → Liquid oxygen

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Answers by country

the Netherlands

11%

70%

11%

France

27%

66%

Australia

15%

56%

12%

the United States

15%

21%

46%

15%

315

Poland

12%

24%

45%

16%

3248

Canada

27%

45%

15%

Germany

13%

18%

44%

22%

543

Austria

14%

28%

43%

13%

Malaysia

25%

43%

the United Kingdom

12%

29%

42%

14%

183

Vietnam

35%

42%

21%

Switzerland

23%

15%

38%

20%

Greece

28%

38%

28%

India

18%

30%

33%

15%

537

Republic of Ireland

12%

43%

31%

12%

Ghana

20%

33%

30%

16%

Nigeria

24%

21%

27%

26%

118

the Philippines

21%

28%

26%

21%

Singapore

15%

30%

25%

30%

Pakistan

20%

26%

24%

28%

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