Tag: sulfur and its oxides

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Questions Related to sulfur and its oxides

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

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

  1. an anaesthetic

  2. an insecticide

  3. a solvent

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

The reaction of propyne with HgSO4/H2SO4 gives acetone (B). Acetone reacts with CHCl3/NaOH (haloform-like conditions) to form chloretone (C). Chloretone is used as a hypnotic/sedative.

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

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

  1. decarboxylating agent

  2. dehydrogenating agent

  3. dehydrating agent

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

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

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

  1. Dilute nitric acid

  2. Dilute sulphuric acid

  3. Dilute hydrochloric acid

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

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

BaCl2 + H2SO4 ———— BaSO4 + HCl

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

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

  1. ozone

  2. carbon monoxide and oxides of sulphur

  3. hydrocarbons and not air

  4. algal spores and marsh gas
Reveal answer Fill a bubble to check yourself
B Correct answer
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.