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Write the reaction of conc. H2SO4 with sugar. What is the role of H2SO4 in this reaction? - Chemistry

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प्रश्न

Write the reaction of conc. H2SO4 with sugar. What is the role of H2SO4 in this reaction?

टीपा लिहा

उत्तर

The reaction is:

\[\ce{\underset{Cane sugar}{C12H22O11} ->[H2SO4] \underset{Carbon}{12 C} + \underset{Water}{11 H2O}}\]

H2SO4 acts as the catalyst in the reaction and helps to remove the water from the sugar molecule.

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2024-2025 (March) Model set 1 by shaalaa.com

संबंधित प्रश्‍न

What is molecular formula of oleum?

(a) H2SO3

(b) H2SO4

(c) H2S2O7

(d) H2S2O8


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Complete the following equations: C + conc. H2SO4


Mention three areas in which H2SO4 plays an important role.


Why is `K_(a_2) "<<" K_(a_1)` for `H_2SO_4` in water?


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What is the action of concentrated sulphuric acid on phosphorous pentachloride


What is the action of concentrated sulphuric acid on potassium chlorate?


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?


Write a balanced chemical equation for the following reaction:

Sulphuric acid is treated with phosphorous.


Write structure and molecular formula for the following compounds:
a. Orthophosphoric acid 
b. Sulphurous acid


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Write the reaction of conc. \[\ce{H2SO4}\] with sugar.


Which of the following reaction is NOT involved in contact process used for manufacturing sulfuric acid?


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The molecular formula of oleum is ____________.


The sulfuric acid obtained by contact process is ____________ % pure.


Which among the following catalysts is used in manufacture of sulphuric acid by contact process?


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:-


The number of dative bonds in sulphric acid molecule is ______.


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