Sulphur trioxide is not directly dissolved in water to form sulphuric acid because:

S O_{3}

does not react with water to form acid

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S O_{3}

gets oxidised to

H_{2} S O_{3}

when dissolved in water

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it results in the formation of dense fog of sulphuric acid which is difficult to condense

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sulphur trioxide is insoluble in water due to its covalent nature

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Solution

The correct option is D it results in the formation of dense fog of sulphuric acid which is difficult to condense

Sulphur trioxide is not directly dissolved in water to form sulphuric acid because.Becuase when sulfur trioxide mixed with water it leads to the formation of dense fog of sulphuric acid which is difficult to condense.
Hence option C is correct.

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Similar questions

Q. Assertion :In the Contact process, sulphur trioxide vapours are absorbed in concentrated sulphuric add and not in water to obtain sulphuric acid. Reason: Directly dissolving sulphur trioxide in water is not possible due to highly exothermic nature of the reaction. Acidic vapors are formed. Oleum is reacted with water to form conc. sulphuric ac

Sulphur trioxide is dissolved in sulphuric acid and not in water because :

In contact process, sulphur trioxide formed is dissolved in 98% sulphuric acid and not in water.

Q. The acid formed when sulphur trioxide reacts with water is ___.

Give reasons for the following:
(i) In the contact process, sulphur trioxide formed is dissolved in 98% sulphuric acid and not in water.
(ii) When solution of sulphur dioxide is exposed to air, it gets converted to sulphuric acid.
(iii) When diluting concentrated sulphuric acid, the acid should be added to water and not water to the acid.
(iv) When concentrated sulphuric acid is exposed to air, its volume increases and it becomes slightly dilute.
(v) Sulphuric acid can form two kinds of salts with sodium chloride.
(vi) When barium chloride is added to dilute sulphuric acid, a white precipitate is formed.
(vii) When carbon is heated with concentrated sulphuric acid, carbon dioxide is formed.
(viii) Ammonia gas cannot be dried by passing through concentrated sulphuric acid.
(ix) When concentrated sulphuric acid is added to sugar/glucose, a black mass is left behind.
(x) Concentrated sulphuric acid should not be added to oxalic acid or formic acid in the open laboratory.
(xi) When concentrated sulphuric acid is added to blue crystalline copper sulphate, it turns powdery white.
(xii) Concentrated sulphuric acid must be stored in airtight bottles.
(xiii) Cotton clothes get burnt with concentrated sulphuric acid.
(xiv) H₂SO₄ cannot be prepared by heating sodium sulphate with conc. HCl or HNO₃.

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