Alkali metals have low melting and boiling point due to the _______ in the crystal lattice.
Strong bonding
Weak bonding
High atomic weight
Which of the following alkali metals have very low density.
Na
Cs
Li
K
Deuterium reacts with oxygen gives
D2O
D3O
D2
D4O
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
_______ is used as a propellant in nucleus.
H2O2
ND3
CH2 = CH2
Para and ortho hydrogen differ in
atomic number
atomic mass
spins of protons
number of neutrons
____________ can be prepared by bombarding lithium with slow neutrons.
protium
deuterium
tritium
none of these
The half life of tritium is
~ 13.2 years
~ 12. 3 years
~ 14. 3 years
~ 10 years
Deuterium nucleus consists of.
2 neutrons
2 protons only
One neutron only
One proton and one neutron
In the extraction of lithium _________ is used as anode.
Ni
P+
Fe
gas - coke splinter
