alloya used to insulate the cylinder of dihydrogen gas

DIHYDROGEN IN LIQ STATE TEMP????

pilot project using dihydrogen gas fuel automobiile was used in when???

1] in terms of energy considering same mass by what times the hydrogen is more efficient by petrol???
2] in terms of mass considering same energy hydrogen is hevier by petrol by how many times????

hydrogen is less polluting as compared to petrol...
however along with hydrogen nitrogen is present as impurity and its oxide is a pollutant... what is the measure to minimise the formation N2oxides

what is hydrogen economy????

where is D2O used and as what????????

how is D2O prepared????????

H+ neucleus size.?
nrml neucleus size??

....% hydrogen in universe
.... by mass on earths atm
.... by mass in earth's crust
.... and .... have mostly hydrogen

urey got prize when and y????

concentration of
protium
deuterium
tritium

differences in chemical and physical properties of isotopes of hydrogen,,,,

how is atomic hydrogen prep>?

H2O2 PREP
1] barium peroxide
2] peroxodisulphat
3] 2-alkylanthraquinols

By reactions ..... % h2o2 obtained then extracted with .... and obtained ....%.
furthur by careful distillation h2o2 obtained is ... %

H2O2 COLOUR...???
HYDRATE WITH WATER???
30%MARKETED MEANING???

STRENTH OF 10V h2o2 is????