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    one of the following process is used for the preparation of sulphuric acid


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    Which of the following process is used for the manufacture of sulphuric acid?

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    The correct option is A

    Contact process

    Contact process is used for the manufacture of sulphuric acid. The various steps in the Contact process are as follows:

    Production of sulphur dioxide.

    Purification of gases.

    Catalytic oxidation of sulphur dioxide.

    Absorption of sulphur trioxide in sulphuric acid.

    Dilution of oleum to obtain sulphuric acid.

    Industrial Preparation: Contact process

    Standard X Chemistry

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    In preparation of sulphuric acid from sulphur dioxide in lead chamber process. What substance is used as a catalyst ?

    Click here👆to get an answer to your question ✍️ In preparation of sulphuric acid from sulphur dioxide in lead chamber process. What substance is used as a catalyst ?


    In preparation of sulphuric acid from sulphur dioxide in lead chamber process. What substance is used as a catalyst ?


    Manganese dioxide


    Vanadium pentoxide


    Nitric oxide


    Raney Nickel

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    Correct option is C)

    In preparation of sulphuric acid from sulphur dioxide in lead chamber process, nitric oxide NO is used as a catalyst.

    In preparation of sulphuric acid from sulphur dioxide in contact process, vanadium pentoxide V

    2 ​ O 5 ​

    is used as a catalyst.

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    Preparation of Sulfuric Acid

    Learn Preparation of Sulfuric Acid topic of Chemistry in details explained by subject experts on Vedantu.com. Register free for online tutoring session to clear your doubts.

    Preparation of Sulfuric Acid


    Preparation of Sulfuric Acid

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    Sulphuric Acid is an Acidic chemical compound with the formula H2SO4. It is widely used in the industries that is why it is called the king of chemicals. Its worldwide production clearly indicates its industrial strength. In the year 2004, its world production was about 180 million tonnes. It is also known as the oil of vitriol. It is an odourless, colourless and viscous liquid that is soluble in water. Preparation of sulphuric Acid generally involves highly exothermic processes.

    The study of the oil of vitriol began in ancient times. It is believed that Muhammad ibn Zakariya al-Razi was the 1st alchemist of Iran who produced Sulphuric Acid. Then in the 17th century, German-Dutch Chemist Johann Glauber prepared Sulphuric Acid by sulphur with potassium nitrate. In 1736, Doctor Joshua Ward used this method for large-scale production of Sulphuric Acid, although it was an expensive method of production. After this many other methods of production of Sulphuric Acid were also discovered but they were not economically feasible.

    Then in 1831, British vinegar merchant Peregrine Phillips patented the contact process, in which Sulphuric Acid is produced by using sulphur dioxide and oleum in presence of vanadium pentoxide as a catalyst. This method is more economically feasible than available all other methods and produces concentrated Sulphuric Acid. It is the current method of producing Sulphuric Acid on a large scale and the high concentration required for industrial processes.

    Contact Process for Manufacturing of Sulphuric Acid 

    Industrially, Sulphuric Acid is produced by the reaction of water with sulphur trioxide, which is made by the chemical combination of sulphur dioxide and oxygen, either by the chamber process or the contact process.

    Steps involved in the contact process of manufacturing Sulphuric Acid are listed below–

    Preparation of sulphur dioxide

    Oxidation of sulphur dioxide to prepare sulphur trioxide

    Addition reaction of sulphur trioxide and Sulphuric Acid to give oleum

    Dilution of oleum to produce concentrated Sulphuric Acid

    Preparation of Sulphur Dioxide – In the 1st step sulphur is oxidised or burned to produce sulphur dioxide. The reaction is given below –

    S(s) + O2(g) 🡪 SO2(g)

    Oxidation of Sulphur Dioxide to Prepare Sulphur Trioxide – Sulphur dioxide is oxidised to sulphur trioxide in presence of vanadium pentoxide as a catalyst. It is an exothermic reaction that is reversible in nature. the reaction is given below –

    2SO2(g) + O2(g) V2O5 🡪 2SO3(g)

    Addition Reaction of Sulphur Trioxide and Sulfuric Acid to Give Oleum – Sulphur trioxide is absorbed into ~98% Sulphuric Acid to form oleum which is also known as fuming Sulphuric Acid. It is an additional reaction. The reaction is given below –

    SO3(g) + H2SO4(I) 🡪 H2S2O7(I)

    Dilution of Oleum to Produce Concentrated Sulfuric Acid – Oleum is diluted with water to form concentrated Sulphuric Acid. The reaction is given below –

    H2S2O7(I) + H2O(I) 🡪 2H2SO4(I)

    It should be noticed here that we used 1 mole of Sulphuric Acid as a reactant and produced 2 moles of Sulphuric Acid.

    It is easy to remember the explanation of the Preparation of Sulfuric Acid with emphasis on the currently used preparation method – the Contact Process. If you are looking for NCERT Solutions of Chemistry Subject log on to the Vedantu website or Download the Vedantu learning app. By doing so you will not only get access to free PDFs of NCERT Solutions of Chemistry but other subjects as well.

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    FAQs on Preparation of Sulfuric Acid

    1. What are the uses of sulphuric Acid?

    Sulfuric Acid is one of the most important industrial chemicals. Some of its main uses are as follows:

    One of the major uses of Sulphuric Acid is in the production of fertilisers like superphosphate of lime and ammonium sulphate.

    It is widely used to manufacture chemicals like hydrochloric Acid, nitric Acid and sulphate salts, and in dyes and pigments.

    In the production of cleaning agents like synthetic detergents.

    It is used in explosives.

    It is used in drain cleaners because of its reactive property.

    It plays a role in wastewater processing and the processing of minerals.

    In the paper industry, it is used to manufacture aluminium sulphate.

    It is also used to produce drugs. For example, the chemotherapy drugs that work on damaging the cancerous cell DNA. It also finds its use in ointments to treat various skin infections.

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