Question

write short note on monds process​

Answer 1

Explanation:

Definition of Mond process. A process for extracting and purifying nickel. The main features consist of forming nickel carbonyl by reaction of the finely divided reduced metal with carbon monoxide, and decomposing the nickel carbonyl, with deposition of nickel on small nickel pellets.

Answer 2

In Monds process, the ore is heated in carbon monoxide to form nickel carbonyl vapour, which is then decomposed at a higher temperature to yield the metal.

Explanation:

• Ludwig Mond, a German-British chemist, developed the Mond process in the late 1800s when he discovered that metals may create carbonyls under certain conditions, which led to the development of metal refining technologies.
• In the Mond reaction, there are three steps. Syngas, a combination of hydrogen and carbon monoxide gas, is introduced to the nickel in step one. The hydrogen gas reacts with the nickel oxide and impurities to generate impure solid nickel:

                  $NiO(s) + H_{2}(g) = > Ni(s) + H_{2}O(g)$

• The impure nickel will react with the carbon monoxide. The reaction between nickel and carbon monoxide produces nickel carbonyl gas, but the impurities stay solid:

                   $Ni(s) + 4CO(g) = > Ni(CO)_{4} (g)$

• The nickel carbonyl gas is finally heated, causing it to breakdown (break apart) into pure nickel and carbon monoxide:

                   $Ni(CO)_{4}(g) = > Ni(s) + 4CO(g)$

• The carbon monoxide is then recycled to keep the process going, while the nickel is collected.