Notes in Hydrogen

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Published	04/27/2024	This element forms more compounds than any other
Published	04/27/2024	In terms of reactivity, hydrogen is very {{c1::low}} as compared to halogens.
Published	04/27/2024	Size of H+ is roughly {{c1::1.5 * 10^-3 pm}} in size, which is very small compared to the normal atomic/ionic size of elements ({{c2::50 to 200 pm}})
Published	04/27/2024	Dihydrogen is the most abundant element in the universe, being {{c1::70}}% of universe by mass.
Published	04/27/2024	What is the principle element of the solar atmosphere?
Published	04/27/2024	Why is hydrogen so rare in atmosphere?
Published	04/27/2024	% abundance of hydrogen by mass in atmosphere
Published	04/27/2024	% abundance of hydrogen in combined form on earth
Published	04/27/2024	{{c1::Deuterium}} is also known as heavy hydrogen.
Published	04/27/2024	Number of neutrons in tritium?
Published	04/27/2024	Deuterium is mostly found in this compound on earth.
Published	04/27/2024	Tritium concentration is about one atom per {{c1::1018}} atoms of protium.
Published	04/27/2024	Tritium emits {{c1::low energy beta-}} particles.
Published	04/27/2024	Order of density of hydrogen isotopes
Published	04/27/2024	Order of bond dissociation enthalpy of hydrogen isotopes.
Published	04/27/2024	How is hydrogen usually prepared in lab?
Published	04/27/2024	How is high purity (>99.5%) hydrogen obtained?
Published	04/27/2024	Reaction of electrolysis of water
Published	04/27/2024	Electrolysis of brine solution reaction
Published	04/27/2024	What happens when hydrocarbons or hot coke has steam passed over it? (also catalyst)
Published	04/27/2024	What is water gas?
Published	04/27/2024	What is syngas?
Published	04/27/2024	What is coal gasification?
Published	04/27/2024	What is the water gas shift reaction?
Published	04/27/2024	What raw material is most of industrial dihydrogen produced from?
Published	04/27/2024	Colour of dihydrogen
Published	04/27/2024	Odour of dihydrogen
Published	04/27/2024	Taste of dihydrogen
Published	04/27/2024	Is hydrogen combustible?
Published	04/27/2024	Is hydrogen soluble in water?
Published	04/27/2024	The H–H bond dissociation enthalpy is {{c1::the highest}} for a single bond between two atoms of any element.
Published	04/27/2024	The dissociation of dihydrogen into its atoms is {{c1::only ~0.081%}} around 2000K which increases to {{c1::95.5%}} at 5000K.
Published	04/27/2024	The atomic hydrogen is produced at a high temperature in {{c1::an electric arc}} or under {{c1::ultraviolet}} radiations.
Published	04/27/2024	What environment is needed when X = iodine?
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Published	04/27/2024	(at high temp)
Published	04/27/2024	(in aqeous solution)
Published	04/27/2024	Hydrogenation of vegetable oils usingnickel as catalyst gives {{c1::edible fats(margarine and vanaspati ghee)}}
Published	04/27/2024	The largest use of dihydrogen is {{c1::synthesis of ammonia}}.
Published	04/27/2024	Hydrogen is used in the manufacture of bulk organic chemicals, particularly {{c1::methanol}}.
Published	04/27/2024	Atomic hydrogen and oxy-hydrogentorches find use for cutting and weldingpurposes. Atomic hydrogen atoms(produced by dissociation of dihydrogenwith the…
Published	04/27/2024	BeH2 and MgH2 are {{c1::polymeric}} in structure.
Published	04/27/2024	Ionic hydride melts {{c1::do}} conduct electricity and on electrolysis liberate {{c2::dihydrogen}} gas at anode.
Published	04/27/2024	The ionic hydrides are {{c1::crystalline, non-volatile and non-conducting}} in solid state.
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Published	04/27/2024	Which hydrides are volatile?
Published	04/27/2024	Saline hydrides are also called
Published	04/27/2024	Molecular hydrides are also called
Published	04/27/2024	CH4 is an electron {{c1::precise}} compound.
Published	04/27/2024	The metals of group {{c1::7, 8 and 9}} do not form hydrides. This is called the hydrogen gap.
Published	04/27/2024	From group 6, only {{c1::chromium}} forms a hydride.
Published	04/27/2024	Compare heat and electrical conductivity of metallic hydrides and the original metals
Published	04/27/2024	Except for hydrides of {{c1::Ni, Pd, Ce and Ac}}, other metallic hydrides have lattice {{c2::different from}} that of the parent metal.
Published	04/27/2024	Bond angle of water
Published	04/27/2024	OH bond length in water
Published	04/27/2024	At atmospheric pressure ice crystallises in the {{c1::hexagonal}} form, but at very low temperatures it condenses to {{c1::cubic}} form.
Published	04/27/2024	Structure of ice
Published	04/27/2024	[photosynthesis]
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Published	04/27/2024	The kind of water that does not give lather with soap
Published	04/27/2024	Why is hard water harmful for boilers?
Published	04/27/2024	What causes temporary hardness?
Published	04/27/2024	How does boiling remove temporary hardness of water?
Published	04/27/2024	(context is removal of temporary hardness)
Published	04/27/2024	What is Clark's method for removal of hard water?
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Published	04/27/2024	What is calgon?
Published	04/27/2024	What happens when calgon is added to hard water?
Published	04/27/2024	What is zeolite/permutit?
Published	04/27/2024	What happens when zeolite/permutit is added to hard water?
Published	04/27/2024	Explain the synthetic resin method for treatment of hard water.
Published	04/27/2024	How is pure de ionised water obtained?
Published	04/27/2024	Complete the reaction and explain further procedure.[H2O2 formation reaction]
Published	04/27/2024	[Preparation of H2O2]
Published	04/27/2024	Laboratory preparation of D2O2
Published	04/27/2024	How is hydrogen peroxide prepared from 1-alkylanthraquinols?
Published	04/27/2024	Colour of hydrogen peroxide
Published	04/27/2024	Is hydrogen peroxide miscible with water?
Published	04/27/2024	What does 100 volume hydrogen peroxide solution mean?
Published	04/27/2024	Order of dihedral angles of hydrogen peroxide in different states
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Published	04/27/2024	How is decomposition of hydrogen peroxide accelerated?
Published	04/27/2024	How is hydrogen peroxide stored?
Published	04/27/2024	{{c1::Urea}} can be added as stabiliser to prevent hydrogen peroxide from decomposing.
Published	04/27/2024	{{c1::Dust}} can induce explosive decomposition of hydrogen peroxide.
Published	04/27/2024	What is perhydrol?
Published	04/27/2024	Use of hydrogen peroxide as cosmetic
Published	04/27/2024	These compounds manufactured with H2O2 are used in high quality detergents
Published	04/27/2024	Use of heavy water
Published	04/27/2024	How is heavy water prepared commercially?
Published	04/27/2024	Cylinder of hydrogen gas to cylinder of petrol with same energy content (weight ratio)
Published	04/27/2024	Why is hydrogen called a rogue element?
Published	04/27/2024	Hydrogen is the {{c1::third}} most abundant non metal on earth.
Published	04/27/2024	Compare rate of reaction of H2 vs D2
Published	04/27/2024	Compare bond lengths of H2, D2, T2
Published	04/27/2024	What is ortho hydrogen?
Published	04/27/2024	Ratio of para to ortho at room temperature
Published	04/27/2024	Ratio of ortho to para hydrogen at absolute 0
Published	04/27/2024	Which spin isomer of hydrogen has more internal energy?
Published	04/27/2024	Thermal conductivity of ortho to para hydrogen
Published	04/27/2024	Why does Zn + HNO3/ conc. H2SO4 not produce hydrogen?
Published	04/27/2024	What is Uyeno's process for production of hydrogen?
Published	04/27/2024	How is hydrogen obtained from products of water gas shift reaction?
Published	04/27/2024	Explain lane's process for manufacture of hydrogen
Published	04/27/2024	1 pm = {{c1::10-12}} m
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