Tag: acid deposition

Questions Related to acid deposition

$ CH _3C \equiv CH \quad \xrightarrow [(HgSO _4]{Dil. H _2SO _4} (B) \xrightarrow [ (NaOH) ]{CHCl _3} (C) $compound (C) can be used as :

chemistry nitrogen and sulfur sulfur and its oxides acid deposition natural resources- air, water and land

  1. an anaesthetic

  2. an insecticide

  3. a solvent

  4. a hypnotic

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Correct Option: D

Sugar on treating with conc.${H} {2}{SO} _{4}$ produces a black mass. In this ${H} _{2}{SO} _{4}$ acts as a _________.

chemistry nitrogen and sulfur sulfur and its oxides acid deposition natural resources- air, water and land

  1. decarboxylating agent

  2. dehydrogenating agent

  3. dehydrating agent

  4. All the above

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Correct Option: C
Explanation:

The sulfuric acid is a dehydrating agent in the reaction that removes water from the sugar in a highly exothermic reaction, releasing heat, steam, and sulfur oxide fumes.

A dilute mineral acid, which forms a white precipitate when treated with barium chloride solution is :

chemistry nitrogen and sulfur sulfur and its oxides acid deposition natural resources- air, water and land

  1. Dilute nitric acid

  2. Dilute sulphuric acid

  3. Dilute hydrochloric acid

  4. none of these

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Correct Option: B
Explanation:

Dilute sulphuric acid is dilute mineral acid which forms a white precipitate when treated with barium chloride solution.

BaCl2 + H2SO4 ———— BaSO4 + HCl

In cities like Bombay and Calcultta, the major air pollutants is/are:

chemistry natural resources- air, water and land sulfur and its oxides acid deposition nitrogen and sulfur

  1. ozone

  2. carbon monoxide and oxides of sulphur

  3. hydrocarbons and not air

  4. algal spores and marsh gas

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Correct Option: B
Explanation:

Causes of air pollution in big cities are -
1. Burning of fossil fuels: Sulfur dioxide emitted from the combustion of fossil fuels like coal, petroleum and other factory combustibles is one the major cause of air pollution. carbon monoxide caused by improper or incomplete combustion and generally emitted from vehicles is another major pollutant along with nitrogen oxides, that is produced from both natural and man made processes.
2. Exhaust from factories and industries: Manufacturing industries release large amount of carbon monoxide, hydrocarbons, organic compounds, and chemicals into the air thereby depleting the quality of air. Manufacturing industries can be found at every corner of the earth and there is no area that has not been affected by it.


List-I List-ll
(A) $\mathrm{H} _{2}{S}\mathrm{O} _{4}$ 1 ) Antichlor
(B)Hypo 2) Bleaches by reduction
(C) $\mathrm{O} _{3}$  + $\mathrm{C} _{2}\mathrm{N} _{2}$ 3) Anti freeze
(D) moist $\mathrm{S}\mathrm{O} _{2}$ 4) Rocket fuel
5 ) Lead batteries

Which of the following is correct match?

chemistry nitrogen and sulfur sulfur and its oxides acid deposition natural resources- air, water and land

  1. (A)-4 , (B)-1 , (C)-3 , (D)-2

  2. (A)-5 , (B)-1 , (C)-4 , (D)-2

  3. (A)-2 , (B)-4 , (C)-5 , (D)-3

  4. (A)-1 , (B)-2 , (C)-4 , (D)-3

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Correct Option: B

State True or False.
Major sulphur dioxides production is through natural sources. 

chemistry nitrogen and sulfur sulfur and its oxides acid deposition natural resources- air, water and land

  1. True

  2. False

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Correct Option: B
Explanation:

The given statement is False.
 Major sulphur dioxides production is through following chemical processes
(1) By burning sulphur
$\displaystyle S+O _2 \rightarrow SO _2 \uparrow$
(2) By roasting zinc blende or iron pyrites.
$\displaystyle 2ZnS + 3O _2  \rightarrow 2ZnO+2SO _2 \uparrow$
$\displaystyle 4FeS _2+11O _2  \rightarrow 2Fe _2O _3+8SO _2 \uparrow $
(3) By heating anhydrite (calcium sulphate), obtained from gypsum with arbon above 1000 deg C.
$\displaystyle 2CaSO _4+C \rightarrow 2CaO+2SO _2 \uparrow+CO _2$

Sinks can _____ excess amount of sulphur dioxide.

chemistry nitrogen and sulfur sulfur and its oxides acid deposition natural resources- air, water and land

  1. Produce

  2. Breakdown

  3. Absorb

  4. Melt

Show answer
Correct Option: C
Explanation:

Sources of $SO _2$ include fossil fuel combustion by industry, biomass burning, volcanic release and the oxidation of dimethylsulphide (DMS) from the oceans. Major SO2 sinks are oxidation by OH and deposition onto wet surfaces. Sinks are the areas that can absorb excess amounts thus reducing its abundance in the environment.

Which of the following is not a sink of sulphur dioxide?

chemistry nitrogen and sulfur sulfur and its oxides acid deposition natural resources- air, water and land

  1. Ocean

  2. Wetlands

  3. Lakes

  4. None of above

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Correct Option: D
Explanation:

$SO _2$ sinks are oxidation by $OH$ and deposition on wet surfaces. Hence, oceans, wetlands and lakes are all sinks for sulphur dioxide.

High concentration of $SO _2$ leads to stiffness of flower buds.
chemistry nitrogen and sulfur sulfur and its oxides acid deposition natural resources- air, water and land

  1. True

  2. False

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Correct Option: A
Explanation:

$SO _2$ is particularly poisonous to trees causing chlorosis and dwarfing. High concentration of $SO _2$ leads to stiffness of flower buds which then eventually fall off. Sulphur oxides $(SO _x)$ and sulphuric acid $(H _2SO _4)$ are related with the damage and destruction of vegetation, soil deterioration, construction material and watercourses.

Sulfur can be removed from coal during burning by using:

chemistry nitrogen and sulfur sulfur and its oxides acid deposition natural resources- air, water and land

  1. copper sulphate

  2. ferrous oxide

  3. both A and B

  4. limestone

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Correct Option: D
Explanation:

Sulfur can be removed from coal during burning by using limestone as a bed material in fluidized bed combustion.