The gas which is used in rockets as oxidizer is:
Liquid hydrogen
Liquid oxygen
Liquid carbon dioxide
Liquid nitrogen
An oxidiser is a substance which helps in the burning of a fuel. Oxygen supports combustion so its liquid form is used in rockets as an oxidizer.
The 'coolants' which can be used in the reactor of a nulcear power station are : (a) liquid mercury and nitrogen dioxide (b) liquid sodium and carbon dioxide (c) liquid ammonia and carbon monoxide (d) liquid boron and uranium oxide.
The correct increasing order of the boiling points of liquid oxygen, liquid argon and liquid nitrogen present in liquid air is :
(a) nitrogen, oxygen, argon (b) nitrogen, argon, oxygen
(c) argon, oxygen, nitrogen (d) oxygen, argon, nitrogen