Para and ortho hydrogen differ in
atomic number
atomic mass
spins of protons
number of neutrons
Alkali metals have low melting and boiling point due to the _______ in the crystal lattice.
Strong bonding
Weak bonding
High atomic weight
Deuterium nucleus consists of.
2 neutrons
2 protons only
One neutron only
One proton and one neutron
Which one of the following is non reducing?
H2S
H2Te
H2Se
H20
Protium consists of one proton and ______
three neutrons
no neutrons
two neutrons
one neutron
Ortho and para hydrogen have
identical chemical properties but different physical properties
identical physical properties and chemical properties
identical physical properties but different chemical properties
different physical and chemical properties
When heated in bunsen flame, lithium gives _______ color
blue
red
lilac
crimson red