Tag: acid deposition

Questions Related to acid deposition

Sulphur dioxide causes ______ in trees.               

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

  1. Emphysema

  2. Chlorosis

  3. Bronchitis

  4. All of above

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Correct Option: B
Explanation:

Oxides of sulphur are produced when sulphur containing fossil fuels are burnt. Sulphur dioxide is a poisonous gas harmful to both animals and plants. It is poisonous to trees, causing dwarfing and Chlorosis.

Which of the following is a natural source of sulphur dioxide?

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

  1. Volcanoes

  2. Home heating

  3. Metal manufacturing

  4. Power stations

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Correct Option: A
Explanation:

Sulphur dioxide can be formed naturally by volcanoes, forest fires etc or by anthropogenic (man-made) sources like power stations, home heating and metal manufacturing.

______ is the main sink for suphur dioxide.

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

  1. Air

  2. Water

  3. Soil

  4. None of above

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Correct Option: B
Explanation:

Since $SO _2$ is acidic in nature, $SO _2$ sinks are oxidation by $OH^-$ and deposition on wet surfaces. So, the ocean i.e. water is the best sink for $SO _2$.

Sulphurous acid is a _________ acid.

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

  1. dibasic

  2. strong

  3. tribasic

  4. both a and b

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Correct Option: A
Explanation:

Sulphurous acid is produced by dissolving sulphur dioxide in water. It is a weak dibasic acid known in the form of its salts e.g. sodium sulphite. It is unstable has has never been isolated as a pure compound.
$2NaOH+{ SO } _{ 2 }\rightarrow { { Na } _{ 2 }SO } _{ 3 }+{ H } _{ 2 }O$

The loss or reduction of chlorophyll in the leaves is termed as:

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

  1. necrosis

  2. chlorosis

  3. epinasty

  4. lichen

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Correct Option: B
Explanation:

Necrosis is the death of body tissue. It occurs when there is some infection or the supply to the part of the plant has stopped. This can also occur from injury, radiation or chemicals.
Chlorosis is yellowing of leaf tissue due to lack of chlorophyll. Possible causes of chlorosis include poor drainage, damaged roots, and compacted roots.
Epinasty is increased growth on the upper surface of an organ or part, causing it to bend downward.
Lichens are made up of two or more closely interacting organisms, a fungus and one or more partners called photobionts. 
Thus, the correct answer is option B. 

Choose the property of sulfuric acid, which is relevant to the preparations of : 
    Ethene from ethanol :

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

  1. Oil. acid (typical acid properties)

  2. Non-volatile acid

  3. Oxidizing agent

  4. Dehydrating agent

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Correct Option: D

In the given equation $S + 2H _2SO _4 \rightarrow 3SO _2+ 2H _2O$: What is the role played by conc. $H _2SO _4$  ?

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

  1. Non-volatile acid

  2. Oxidising agent

  3. Dehydrating agent

  4. None of the above.

Show answer
Correct Option: B
Explanation:

Sulphur is oxidised to sulphur dioxide by sulphuric acid which acts as oxidising agent.

Which of the following can be used as dehydrating agents?

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

  1. Conc. $H _2SO _4$

  2. $POCl _3$

  3. $P _2O _5$

  4. All of the above

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Correct Option: D
Explanation:

A dehydrating agent is a substance that dries or removes water from a material. In chemical reactions where dehydration occurs, the reacting molecule loses a molecule of water. Sulfuric acid, concentrated phosphoric acid, hot aluminum oxide, and hot ceramic are common dehydrating agents in these types of chemical reactions. Dehydration reactions in organic synthesis often result in the conversion of the reacting molecule from one type of compound to another, such as the conversion of alcohols to alkene.

The solution which liberates sulphur dioxide gas, from sodium sulphite :

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

  1. Sodium hydroxide solution

  2. A weak acid

  3. Dilute sulphuric acid

  4. hydrochloric acid

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Correct Option: C
Explanation:
Sodium sulphite reacts with dilute sulphuric acid in the manner shown below:
$Na _2SO _3(s) + H _2SO _4(l) \rightarrow Na _2SO _4 + SO _2(g) + H _2O$ 
So, $SO _2$ is liberated as a product in the above reaction.

When sugar crystals are added to a hard glass test tube containing conc. sulphuric acid produce ____________.

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

  1. brown carbon residue

  2. black carbon residue

  3. white carbon residue.

  4. none of these

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Correct Option: A
Explanation:

Sugar crystals burn in conc sulphuric acid producing brown carbon residue and smell of caramel carbon.