What hydrogen reacts with and the resulting gas does not contain acidic impurity gases

Inorganic reactions: Hydrogen and nitrogen 3H2+N2== High temperature, high pressure, catalyst==2NH3 Hydrogen reacts with silicon at high temperature 2H2+Si== High temperature==SiH4 Hydrogen reacts with phosphorus vapor 3H2+2P== High temperature==2PH3 Hydrogen reacts with cuprous nitride 3H2+2Cu3N== Heating==6Cu+2NH3 Photochemical smog hydrogen reduces nitrous oxide to produce nitrogen H2+N2O==Light==N2+H2O Organic Chemistry (Hydrogenation Reaction): Hydrogen and acetic acid react under hydrogenation catalyst and heating conditions to form acetaldehyde gas H2+CH3COOH== catalyst, heating==CH3CHO+H2O Hydrogen and olefins (such as ethylene) hydrogenation reaction C2H4+H2== catalyst, heating==C2H6 Hydrogen reacts with vinyl chloride to form ethyl chloride gas C2H3Cl+H2== Catalyst, Heating==C2H5Cl Related Links:

I space hydrogenation catalyst.

Reacts with elemental sulfur to form hydrogen sulfide gas!

Answer] :d the properties of low-grade naphthenes (especially tricyclic and tetracyclic hydrocarbons) are similar to those of alkenes, and cyclopropane can catalyze hydrogenation to propane. The double bonds in acetaldehyde and acetone carbonyl groups are easily broken and an addition reaction occurs, which can catalyze hydrogenation to produce alcohol.

There is no unsaturated bond in the methylpropane molecule, and the lead-based cover hydrogenation reaction cannot occur.

Hydrogen is chemically reactive and can react with many substances

So the answer is:

1.Physical properties of hydrogen: Colorless, odorless, insoluble in water, it is the least dense gas.

2.Chemical properties of hydrogen (1) Flammability:

**Limit 4%. Purification method.

2) In the knowledge point of reduction, it is necessary to pay attention to the relevant matters in the experiment of hydrogen reduction of copper oxide.

Device requirements: A Sheng cuo test tube mouth should be slightly inclined downward.

b The air duct for hydrogen is located above the test tube, and its end is located above the cuo, so as to facilitate the hydrogen and cuo charging.

Divide contact. c The test tube mouth can not be plugged, which is conducive to the discharge of air and avoids the increase of air pressure and the occurrence of **. Things to note during the procedure:

a Hydrogen: early departure, late return. The implication is that H2 is introduced before the experiment to drive away the air, in case **, after the end.

Continue to pass H2 until the tube has cooled completely to prevent the hot copper from being re-oxidized to copper oxide. That is, the first to arrive, the last to go, isn't it early to go out and return late?

b Alcohol lamp: late arrival and early departure. 3.Laboratory preparation of hydrogen:

1) Raw materials: active metals (Zn, Fe, Mg, etc.) and some acid solutions (such as dilute sulfuric acid, hydrochloric acid, etc.). 2) Principle: The metal undergoes a displacement reaction with the acid.

3) Device: Solid liquid does not heat device. Special device: Qipu generator. (4) Collection: downward exhaust air method or drainage gas collection method.

1) The physical properties of hydrogen are: under normal conditions, hydrogen is a colorless and odorless gas, which is insoluble in water and has a smaller density than air; So the answer is: under normal conditions, hydrogen is a colorless and odorless gas; Insoluble in water; The density is less than air.

2) The chemical properties of hydrogen are: flammability and reduction; So the answer is: flammability; reductiveness;

3) Hydrogen can be used to make rocket fuel or fill sounding balloons, so the answer is: to make rocket fuel.

Hydrogen is chemically stable at room temperature, but it can chemically react with many substances under ignition or heating conditions, for example, under ignition conditions, it can react with oxygen in the air to form water, and under heating conditions, it can react with copper oxide, iron oxide and other substances to form metals and water

Therefore, fill in: stable; Ignite; Heating

From the analysis, it can be seen that the reaction is: X and oxygen ignite the slag imitation water; The hydrogen in the water must come from X, that is, X must contain hydrogen, so X may be hydrogen, methane and other gases; However, the oxygen element in the water does not necessarily come from X, and may come from oxygen, so X may contain oxygen such as bond fiber, which may not be there

Therefore, d

(1) Physical properties do not need to be expressed through chemical changes: hydrogen is a colorless, odorless gas with a smaller density than air and is insoluble in water, and does not need to be manifested through chemical changes, which belongs to the physical properties of hydrogen;

2) The chemical properties of hydrogen are: it can be burned in the air to produce water, hydrogen is often used in the laboratory, such as it can react with copper oxide, reduce copper oxide to copper, and produce water.

3) Hydrogen is less dense than air, can be used to fill hydrogen balloons, is flammable, and can be used for high-energy fuels