Gas is filled as liquid in cylinder in – a) O2b) CO2 c) N2Od) Cyclopropanee) Halothane: (A) bcd, (B) d, (C) ab, (D) ac
Answer is A. Oxygen, nitrogen, air and helium → Gaseous form
Nitrous oxide, carbon dioxide and cyclopropane → Liquid in equilibrium with saturated vapour.