21.
Radioactive elements emit alpha, Beta and Gamma rays and are characterised by their halflives. The radioactive isotope of hydrogen is
A
Protium
B
Deuterium
C
Tritium
D
Hydronium
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Radioactive elements emit alpha, Beta and Gamma rays and are characterised by their halflives. The radioactive isotope of hydrogen is
Protium
Deuterium
Tritium
Hydronium
on hydrolysis produces
Only one element of..................forms hydride
group 6
group 7
group 8
group 9
In what form can you store hydrogen?
Gas
Liquid
Solid
All of the above
Hydrogen resembles halogens in many respects for which several factors are responsible. Of the following factors which one is most important in this respect?
Its tendency to lose an electron to form a cation.
Its tendency to gain a single electron in its valence shell to attain stable electronic configuration.
Its low negative electron gain enthalpy value.
Its small size.
Hydrogen peroxide is obtained by the electrolysis of
water
sulphuric acid
hydrochloric acid
fused sodium peroxide
Hydrogen peroxide is
an oxidising agent
a reducing agent
both an oxidising and a reducing agent
neither oxidising nor reducing agent
How many hydrogen fueling stations are operational in the U.S.?
8
100
12
68
How long does it take to fill your cars hydrogen tank at a fueling station?
3-5 minutes
8 minutes
15 minutes
about 60 minutes
Elements of which of the following group(s) of periodic table do not form hydrides.
Groups 7, 8, 9
Group 13
Groups 15, 16, 17
Group 14
has higher value of following physical parameters than , except
Molecular Mass
Melting Point
Density
Dielectric Constant
A hydrogen fuel cell is...............times more efficient than an engine
1
3 - 2
8 - 7
10