Question

Chapter - Study of element Hydrogen
Solve in your notebook only

1. Write physical properties of Hydrogen
2 Difference detween H and H2
3 Give a test for hydrogen
4 write any industrial preparation of Hydrogen
5 explain Haber process and what is a role of Fe and Mo in this reaction
6 usse of Hydrogen
7 prepare H from electrolysis of water
8 write isotopes of H.​

Answer 1

1. The Physical Properties of Hydrogen are as follows:

Color : Colorless.

Phase : Gas : Hydrogen changes from a gas to a liquid at a temperature of -252.77°C (-422.99°F) : It changes from a liquid to a solid at a temperature of -259.2°C (-434.6°F )

Odor : Hydrogen is an odorless gas.

Taste : A tasteless gas.

2. H2 is molecular hydrogen, which is mostly gaseous and extremely flammable. It is a molecule consisting two hydrogen atoms. Whereas H is hydrogen, neutral and an atom.

3. A simple test for the prescence of hydrogen gas is to light a splint and put it in the smoke present. If it makes a squeaky pop sound, then hydrogen gas is present. The hydrogen gas produced is combustible, and will therefore burn when it reacts with oxygen gas.

4. The most important industrial method for the production of hydrogen is the catalytic steam–hydrocarbon process, in which gaseous or vaporized hydrocarbons are treated with steam at high pressure over a nickel catalyst at 650°–950° C to produce carbon oxides and hydrogen: CnH2n+2 + nH2O → nCO + (2n + 1)H2; CnH2n+2 + 2nH

5. The Haber Process combines nitrogen from the air with hydrogen derived mainly from natural gas (methane) into ammonia. The reaction is reversible and the production of ammonia is exothermic.

6. Hydrogen: uses

commercial fixation of nitrogen from the air in the Haber ammonia process.

hydrogenation of fats and oils.

methanol production, in hydrodealkylation, hydrocracking, and hydrodesulphurization.

rocket fuel.

welding.

production of hydrochloric acid.

reduction of metallic ores.

7. Electrolysis of Water involves the breakdown of water. The process of electrolysis is Inter change of atoms and ions. By removing or adding electrons which happens by an external circuit. Electrolysis of water produces pure hydrogen.

8. The three most stable isotopes of hydrogen: protium (A = 1), deuterium (A = 2), and tritium (A = 3).

Protium, the most common isotope of hydrogen, consists of one proton and one electron. ...

A deuterium atom contains one proton, one neutron, and one electron.