Tag: nitrogen and sulfur

Questions Related to nitrogen and sulfur

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. 

Select the correct statement (S).

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

  1. p- chlorometaxylenol and dichlorometaxylenol are antibacterials and deodorants

  2. BHT and BHA are food antioxidants

  3. $SO _2$ and $SO _3^{-2}$ are antioxidants for wine and beers

  4. All of the above are correct statements

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Correct Option: D
Explanation:
(A) p-chlorometaxylenol & dichlorometaxylenol are antibacterials & deodrants as they are most effective against gram positive bacteris.
(B) BHA & BHT are antioxidants as oxygen reacts preferentially with BHA or BHT rather than oxidising fats or oils thereby protecting them from spoilage.
(C) $SO _{2} $ & $ SO _{3}^{2-}$ are used as preservative because of antioxidative & antimicrobial properties.

Which of the following acts as pickling agent?

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

  1. $\displaystyle\;HNO _3$

  2. $\displaystyle\;HCl$

  3. $\displaystyle\;H _2SO _4$

  4. $\displaystyle\;HNO _2$

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Correct Option: C
Explanation:

Pickling is a metal surface treatment i.e; used to remove impurities such as strains, inorganic contaminants on the surface of the metal. So to remove this pickling liquor containing acid is used. 

$H _2SO _4$ is used as pickling agent because of its high oxidizing power, for which it can dissolve noble metals as well.

$1000L$ of air at STP was dissolved in water and required $2.5\times { 10 }^{ -5 }$ moles of $KMn{ O } _{ 4 }$ for complete reaction of ${SO} _{2}$ at pollutants. Thus, ${SO} _{2}$ content in air is :

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

  1. $1.4ppm$

  2. $14ppm$

  3. $2.8ppm$

  4. $6.25ppm$

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Correct Option: A

A solution of chromium oxide in concentrated sulphuric acid is used for cleaning glass in laboratories because it:

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

  1. Removes sand particles

  2. Oxidises grease

  3. Dissolves glass

  4. Reacts with dust

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Correct Option: B
Explanation:

Because a solution of chromium oxide in sulfuric acid (also known as a sulfochromic mixture or chromosulfuric acid) is a powerful oxidizing agent, it can be used to clean laboratory glassware, particularly of otherwise insoluble organic residues.They oxidize the grease present on the glass surfaces and hence thus it can be cleaned.

Fertilizer used in excess by the farmers does not cause water pollution.

chemistry nitrogen and sulfur ammonia-properties and uses ammonia compounds of nitrogen - ammonia

  1. True

  2. False

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Correct Option: B
Explanation:

Fertilizers in excess damage the soil and gets added into water while irrigation and they gets stagnated and produce water pollution.

So,the given statement is false.

Which gas is produced when calcium nitride $(Ca _{3}N _{2})$ is hydrolyzed by water?

chemistry nitrogen and sulfur ammonia and fertilizers preparation of ammonia-laboratory method and haber's process ammonia

  1. $N _{2}$

  2. $NH _{3}$

  3. $H _{2}$

  4. $O _{2}$

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Correct Option: B
Explanation:
Ammonia gas is produced when calcium nitride $(Ca _{3}N _{2})$ is hydrolyzed by water.
$Ca _3N _2+6H _2O \to 3Ca(OH) _2+2NH _3$

Which of the following compounds will not give ammonia on heating?

chemistry nitrogen and sulfur ammonia and fertilizers preparation of ammonia-laboratory method and haber's process ammonia

  1. $(NH _{4}) _{2}SO _{4}$

  2. $(NH _{4}) _{2}CO _{3}$

  3. $NH _{4}NO _{2}$

  4. $NH _{4}Cl$

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Correct Option: C
Explanation:

$NH _4NO _2$  will not give ammonia on heating.It gives $NO _2H _2O$

$NH _4NO _2(s)\rightarrow N _2(g) + 2H _2O(g)$

.

Hence option C is correct.

Which of the following factors would favour the formation of ammonia?

chemistry nitrogen and sulfur ammonia and fertilizers preparation of ammonia-laboratory method and haber's process ammonia

  1. High pressure

  2. Low temperature

  3. High volume

  4. Low pressure

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Correct Option: A
Explanation:
According to Le Chatelier's principle, high pressure would favour the formation of $NH _{3}$
$N _{2}$(g) + 3$H _2${g) $\leftrightharpoons$ $NH _{3}$(g)
The optimum conditions for the production of $NH _{3}$ are pressure of 200 x 10$^{5}$ Pa (about 200 atm) and temperature of -700 K.
In the given reaction, the number of moles of reactant is more than the product and according to the ideal gas equation, the pressure is inversely proportional to the number of moles.
Thus, by increasing pressure i.e. at high pressure, the reaction will proceed in a forward direction towards less number of moles. Thus the formation of the ammonia increases.

In the preparation of $HNO _{3}$, we get NO gas by catalytic oxidation of ammonia. The moles of NO produced by the oxidation of two moles of $NH _{3}$ will be :

chemistry nitrogen and sulfur ammonia and fertilizers preparation of ammonia-laboratory method and haber's process ammonia

  1. 2

  2. 3

  3. 4

  4. 6

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Correct Option: A
Explanation:
In the preparation of $HNO _{3}$, we get NO gas by catalytic oxidation of ammonia.In the below equation 4 moles of $NH _3$ produced 4 moles of $NO$.So the moles of $NO$ produced by the oxidation of two moles of $NH _{3}$ will be2 moles.
$4NH _3+5O _2\rightarrow 4NO+6H _2O$.
Hence option A is correct.