At absolute zero:
Only para hydrogen exists
Only ortho hydrogen exists
Both para and ortho hydrogen exist
None of the above
Related Questions
The property of hydrogen which distinguishes it from alkali metals is
Its electropositive character
Its affinity for non-metal
Its reducing character
Its metallic character
Ordinary hydrogen is a mixture at:
A metal hydride crystallizes in a face-centered cubic lattice with hydrogen atoms occupying tetrahedral voids. If the edge length of the unit cell is 'a', what is the distance between two nearest hydrogen atoms?
a/2
a/β2
a/4
β3a/4
Tritium, a radioactive isotope of hydrogen, emits which of the following particles?
The ratio of electron, proton and neutron in tritium is:
Which pair does not show hydrogen isotopes?
Ortho hydrogen and para hydrogen
Protium and deuterium
Deuterium and tritium
Tritium and protium
When silicon is boiled with caustic soda solution, the gas evolved is:
None of these
The percentage of para hydrogen in ordinary hydrogen increases when:
Temperature is lowered
Temperature is increased
Pressure is increased and temperature is decreased.
None of the above
The most reactive state of hydrogen is:
Atomic hydrogen
Heavy hydrogen
Molecular hydrogen
Nascent hydrogen
Which of the following statement is correct
Hydrogen has same ionization potential as sodium
Hydrogen has same electronegativity as halogens
It will not be liberate at anode
Hydrogen has oxidation state +1, zero and -1
