Tag: nitrogen and sulfur

Questions Related to nitrogen and sulfur

Which of the following compound has nitrogen percentage highest?

chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

  1. Ammonium nitrate

  2. Ammonium sulphate

  3. Calcium cyanamide

  4. Urea

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Correct Option: A

Nitrogen gas is prepared :

chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

  1. by heating ammonium nitrate.

  2. by reacting chlorine with liquor ammonia.

  3. by passing $ HNO _3 $ vapours on red hot copper

  4. by beating lead nitrate.

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Correct Option: A
Explanation:

to prepare pure nitrogen in laboratory a mixture of ammonium chloride and sodium nitrite is heated.  The product formed is ammonium nitrite.  This compound is very unstable and breaks into nitrogen and water.

Dinitrogen is formed when :-

chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

  1. Magnesium nitride is heated

  2. Red lead is thermally decomposed

  3. Ammonium nitrite is treated with ${\text{Ba}}{\left( {{\text{OH}}} \right) _{\text{2}}}$

  4. Barium azide is thermally decomposed

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Correct Option: A

(i) $BaC _2+N _2\overset{\Delta}{\rightarrow} (B)$

(ii) $CaC _2+N _2\overset{\Delta}{\rightarrow} (A)$

Identify $(A)$ and $(B)$:

chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

  1. $A: Ca(N=C=N)$ ; B: $Ba(C\equiv N) _2$

  2. $A: Ca(N=C=N)$ ; B:$Ba _2(C\equiv N) _4$

  3. $A: Ca(N=C=N) _2$ ; B:$Ba(C\equiv N) _2$

  4. $A: Ca(N=C=N) _2$ ; B: $Ba _2(C\equiv N) _4$

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Correct Option: A
Explanation:

Reaction:
$CaC _2+N _2\overset{\Delta}{\rightarrow}  Ca(N=C=N)$
$BaC _2+N _2\overset{\Delta}{\rightarrow}  Ba ( CN) _2$

In plants, atmospheric nitrogen is converted into : 

chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

  1. carbohydrate

  2. proteins

  3. amino acids

  4. fats

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Correct Option: B,C
Explanation:

Nitrogen fixation is a process in which nitrogen ($N _2$) in the atmosphere is converted into ammonium ($NH _4^+$). Nitrogen fixation, natural and synthetic, is essential for all forms of life because nitrogen is required to biosynthesize basic building blocks of plants, animals and other life forms, e.g., nucleotides for DNA and RNA and amino acids for proteins. 

If the amount of nitrogen in air is low, then the burning capacity of air decreases.

chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

  1. True

  2. False

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Correct Option: B
Explanation:

Nitrogen is not combustible under ordinary circumstances. In fact, the National Fire Protection Association has given nitrogen a flammability rating of zero so it has no effect on burning.

$Ca+C _{2}\rightarrow CaC _{2} + N _2\rightarrow A$


Compound (A) is used as a/an:

chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

  1. fertillizer

  2. dehydrating agent

  3. oxidising agent

  4. reducing agent

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Correct Option: A
Explanation:

$Ca+C _2\rightarrow CaC _2+N _2\rightarrow  Ca(CN) _2$


So, $CaC _2$ is used as ripening agent and $Ca(CN) _2$ used as fertilizer.


Hence, option A is correct.

$\mathrm{A}$ nitrogenous fertilizers having more nitrogen is :

chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

  1. $(\mathrm{N}\mathrm{H} _{4}) _{2}\mathrm{S}\mathrm{O} _{4}$

  2. $Ca(NO _{3}) _2$

  3. $NH _{2}CONH _{2}$

  4. $NH _4NO _3$

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Correct Option: C
Explanation:

Percentage of $N _2$ in following compounds is calculated by formula 
$(atomic weight of N _2 in compound / Atomic weight  the compound)\times100$
So, percentage of $N _2$ in compounds is given as
In ${(NH _4)} _{2}SO _4$ it is 21%
In $Ca{(NO _3)} _{2}$ it is 17%
In $NH _2CONH _2$ it is 47%
In $NH _4NO _3$ it is 35%.

Which one of the following statement is not correct for  $N _{2}$?

chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

  1. It has small size

  2. It is a typical non metal

  3. It does not eadily react with oxygen

  4. d-orbitals are available for bonding

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Correct Option: D
Explanation:

d-orbitals are not available for bonding in N. 
there are not any 2d orbitals 
Electronic configuration: $1s^{2} 2s^{2} 2p^{3}$

Assertion (A): Anhydrous Calcium chloride is used as catalyst in cyanamide process
Reason (R): Catalyst increases the rate of reaction.

chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

  1. Both (A) and (R) are true and (R) is the correct explanation of (A)

  2. Both (A) and (R) are true and (R) is not the correct explanation of (A)

  3. (A) is true and (R) is false

  4. (A) is false but (R) is true

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Correct Option: A
Explanation:

Catalyst increases the rate of reaction both in forward and reverse direction by decreasing the activation energy.
In cyanamide process, calcium chloride is used to increase the rate.