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प्रश्न
Write the conditions to maximize the yield of H2SO4 by contact process.
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उत्तर
Manufacturing of sulphuric acid via the contact process involves three steps:
(1) Burning of ores to form SO2
(2) Conversion of SO2 to SO3 using V2O5 as a catalyst
(3) Absorption of SO3 in H2SO4 to give oleum
The second step, i.e. conversion of SO2 to SO3 is the key step. Since this reaction is exothermic in nature and two moles of gaseous reactant give one mole of gaseous product. Thus, in accordance with Le Chatelier's principle, to obtain the maximum amount of SO3, low temperature and high pressure are required.
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संबंधित प्रश्न
Complete the following equations: C + conc. H2SO4 →
Describe the manufacture of H2SO4 by contact process?
Write balanced equations for NaCl is heated with sulphuric acid in the presence of MnO2
What is the action of concentrated sulphuric acid on phosphorous pentachloride
What happens when dilute sulphuric acid is treated with CaF2
What is the action of concentrated sulphuric acid on copper
When concentrated sulphuric acid was added to an unknown salt present in a test tube a brown gas (A) was evolved. This gas intensified when copper turnings were added to this test tube. On cooling, the gas (A) changed into a colourless solid (B).
1) Identify (A) and (B).
2) Write the structures of (A) and (B).
3) Why does gas (A) change to solid on cooling?
Complete and balance the following equations:
S+H2SO4(conc.) →
Write a balanced chemical equation for the following reaction:
Sulphuric acid is treated with phosphorous.
Which of the following reaction is NOT involved in contact process used for manufacturing sulfuric acid?
Identify the INCORRECT statement about H2SO4.
The molecular formula of oleum is ____________.
What is the ratio of volumes of gases involved in the preparation of sulphur trioxide from sulphur dioxide and dioxygen respectively under similar conditions of temperature and pressure?
In the manufacture of sulphuric acid by contact process Tyndall box is used to ____________.
Which of the following statements are correct?
(i) S – S bond is present in \[\ce{H2S2O6}\].
(ii) In peroxosulphuric acid \[\ce{(H2SO5)}\] sulphur is in +6 oxidation state.
(iii) Iron powder along with \[\ce{Al2O3}\] and \[\ce{K2O}\] is used as a catalyst in the preparation of \[\ce{NH3}\] by Haber’s process.
(iv) Change in enthalpy is positive for the preparation of \[\ce{SO3}\] by catalytic oxidation of \[\ce{SO2}\].
The oxidation number of sulphur in Na2S4O6 is:-
What is the catalyst used for the oxidation of SO2 to SO3 in the lead chamber process for the manufacture of sulphuric acid?
