Why is sulphur dioxide considered as an air pollutant?

It increases the temperature of the atmosphere.

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It is used as insecticide which causes air pollution.

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It causes acid rain due to formation of sulphuric acid on combining with

O_{2}

and

H_{2} O

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It is a strong oxidising agent hence oxidises the other components of air.

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Solution

The correct option is C It causes acid rain due to formation of sulphuric acid on combining with $O_{2}$ and $H_{2} O$ .
$S O_{2}$ reacts with $O_{2}$ and $H_{2} O$ (water vapour) present in air forming sulphuric acid $(H_{2} S O 4)$ causing acid rain.
$2 S O_{2} + O_{2} + 2 H_{2} O ⟶ 2 H_{2} S O_{4}$

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Similar questions

(a) Name the process used for the large scale manufacture of sulphuric acid.
(b) Which property of sulphuric acid accounts for its use as a dehydrating agent?
(c) Concentrated sulphuric acid is both an oxidising agent and a non-volatile acid. Write one equation each to illustrate the properties of sulphuric acid mentioned above.

Q. (a) in Contact process, sulphur dioxide can be oxidised to sulphur trioxide in the presence of platinised asbestos which acts as a catalyst. The reaction is exothermic. Explain what is meant by the terms in Italics.
(b) Give examples of the use of sulphuric acid.
(i) As an electrolyte In everyday use.
(ii) As non-volatile acid.
(iii) As an oxidising agent.
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Conc. sulphuric acid acts as an oxidising agent when it undergoes :

Describe the reactions that show
(i) Concentrated sulphuric acid is a non-volatile acid.
(ii) Concentrated sulphuric acid acts as a dehydrating agent.
(iii) Concentrated sulphuric acid is an oxidising agent.
(iv) Dilute sulphuric acid behaves as dibasic acid.

Q. Assertion :Nitrates give brown fumes with concentrated sulphuric acid due to formation of nitrogen dioxide. Reason: Sulphuric acid can act as oxidizing agent also.

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Why is sulphur dioxide considered as an air pollutant?

The correct option is C It causes acid rain due to formation of sulphuric acid on combining with O2 and H2O.SO2 reacts with O2 and H2O (water vapour) present in air forming sulphuric acid (H2SO4) causing acid rain.2SO2+O2+2H2O⟶2H2SO4