5672556
Descripción
Fichas por Apurva Dhulaj, actualizado hace más de 1 año
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Creado por Apurva Dhulaj
hace más de 8 años
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| Pregunta | Respuesta |
| alloya used to insulate the cylinder of dihydrogen gas | NaNi5 Ti-TiH2 Mg-MgH2 |
| DIHYDROGEN IN LIQ STATE TEMP???? | 20K |
| pilot project using dihydrogen gas fuel automobiile was used in when??? | october 2005 5%hydrogen in CNG |
| 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???? | 1] 3times 2] 30times |
| 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 | adding small amount of water into the cylinder prevents the nirtogen and oxygen from reacting with each other.. |
| what is hydrogen economy???? | transportation of energy in form of liq or gaseous H2 |
| where is D2O used and as what???????? | it is used as a moderator in nuclear reactors. |
| how is D2O prepared???????? | #by exhaustive electrolysis of water. #byproduct in some fertilizer industries... #K2S2O8 + D2O= KDSO4 + D2O2 |
| H+ neucleus size.? nrml neucleus size?? | 1.5*10(-3)pm 50-200pm |
| ....% hydrogen in universe .... by mass on earths atm .... by mass in earth's crust .... and .... have mostly hydrogen | 70 0.15 15.4 jupiter and saturn |
| urey got prize when and y???? | separated hydrogen isotope[deuterium] american scientist by physical method |
| concentration of protium deuterium tritium | #predominant #0.0156% in form of HD #1per 10(18)atoms of protium, T is radioactive, emits low energy B- particles, half life=12.33 years |
| differences in chemical and physical properties of isotopes of hydrogen,,,, | #chemical- all have same chem prop but differ in rste of reaction due to diff in bond dissotiation enthalpy #physical properties vary a lot due to diff mass no. |
| how is atomic hydrogen prep>? | electic arc or uv radiation |
| H2O2 PREP 1] barium peroxide 2] peroxodisulphat 3] 2-alkylanthraquinols | #barium peroxide is acidified BaO2,8H2O + H2SO4=BaSO4 + H2O2+ H2O #HSO4-[ELECTOLYSIS]= HO3SOOSO3[HYDROLYSIS]= HSO4- + H + H2O2 # AUTOOXIDTION 2-ethylanthraquinol=H2O2 |
| By reactions ..... % h2o2 obtained then extracted with .... and obtained ....%. furthur by careful distillation h2o2 obtained is ... % | By reactions 1% h2o2 obtained then extracted with WATER and obtained 30%. furthur by careful distillation h2o2 obtained is 85 % and then further it can be frozen where only water gets frozen... |
| H2O2 COLOUR...??? HYDRATE WITH WATER??? 30%MARKETED MEANING??? | VERY PALE BLUE LIQUID H2O2.H2O H2O2 MARKETED AS 100VOLUME, ONE MILLILITER OF 30% H2O2 SOLUTION WILL GIVE 100 VOLUME OXYGEN |
| STRENTH OF 10V h2o2 is???? | h2o2= 68*10/22.4=30.36 |
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