Tag: acid deposition

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Questions Related to acid deposition

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

Sulphur dioxide causes ______ in trees.               

  1. Emphysema

  2. Chlorosis

  3. Bronchitis

  4. All of above
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

Sulphurous acid is a _________ acid.

  1. dibasic

  2. strong

  3. tribasic

  4. both a and b
Reveal answer Fill a bubble to check yourself
A Correct answer
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.
$2NaOH+{ SO } _{ 2 }\rightarrow { { Na } _{ 2 }SO } _{ 3 }+{ H } _{ 2 }O$

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

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

  1. necrosis

  2. chlorosis

  3. epinasty

  4. lichen
Reveal answer Fill a bubble to check yourself
B Correct answer
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. 

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

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

  1. Oil. acid (typical acid properties)

  2. Non-volatile acid

  3. Oxidizing agent

  4. Dehydrating agent
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sulfuric acid acts as a dehydrating agent in the preparation of ethene from ethanol (C2H5OH -> C2H4 + H2O).

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

Which of the following can be used as dehydrating agents?

  1. Conc. $H _2SO _4$
  2. $POCl _3$
  3. $P _2O _5$

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

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

  1. Sodium hydroxide solution

  2. A weak acid

  3. Dilute sulphuric acid

  4. hydrochloric acid
Reveal answer Fill a bubble to check yourself
C Correct answer
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.