Question

Which is distilled first.

• A. Liquid $CO_{2}$
• B. Liquid $N_{2}$
• C. Liquid $O_{2}$
• D. Liquid $H_{2}$

Answer 1

Answer: (D)

Liquid $H_{2}$

Answer 2

Boiling point of liquid hydrogen is lowest of given substances so it is distilled first.