Tag: nitrogen and sulfur

Questions Related to nitrogen and sulfur

Which one of the following compounds on strong heating evolves ammonia gas?

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

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

  2. $NH _4NO _{3}$

  3. $(NH _{4}) _{2}Cr _{2}O _{7}$

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

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Correct Option: A
Explanation:

Ammonia is obtained by heating ammonium sulphate.
$(NH _4) _2SO _4 \rightarrow NH _3 + NH _4HSO _4$

Indicate which of the following statement is true or false.
The reaction between hydrogen and nitrogen to form ammonia is reversible.

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

  1. True

  2. False

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Correct Option: A
Explanation:
When hydrogen gas combines with nitrogen to form Ammonia the following chemical reaction will take place. Our equilibrium reaction will be
 $N _2$(g) + 3$H _2$(g) ⇔ 2$NH _3$(g) + Heat 

In this case, Hydrogen and nitrogen react together to form ammonia.

You can find the concentration/ mass of product (NH3) formed at equilibrium if you know the equilibrium constant (K) of the reaction.


The rate of reaction (forward or backward) changes with the change in pressure and temperature.

The compound that produces ammonia when treated with sodamide is 

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

  1. $CH _{3}-CH _{2}-CH=CH _{2}$

  2. $CH _{3}-C\equiv C-CH _{3}$

  3. $CH _{2}=CH-CH=CH _{2}$

  4. $CH _{3}-CH _{2}-C\equiv CH$

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Correct Option: C

Two major requirements for preparation of ammonia are

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

  1. Low temperature and high pressure

  2. Low temperature and present pressure

  3. High temperature and low pressure

  4. High temperature and high pressure

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Correct Option: A
Explanation:

This reaction is 

(a) reversible,

 (b) exothermic, and 

(c) proceeds with a decrease in volume.

According to the Le Chatelier's principle, the favorable conditions for the formation of ammonia are,

Low temperature

The temperature should be remain as low as possible, (although at unusually low temperatures, the rate of reaction becomes slow). It has been found that the temperature, which optimizes the yield of ammonia for the reaction, is maximum at about 500°C.

High pressure

Since Haber's process proceeds with a decrease in volume, it is favored by high pressure. In actual practice, a pressure of 200 - 900 atmospheres is employed.

Calcium imide on hydrolysis will give gas (B) which on oxidation by bleaching powder gives gas (C). Gas (C) on reaction with magnesium gives compound (D). (D) on hydrolysis gives again gas (B). (B), (C) and (D) respectively are :

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

  1. ${NH _3}$, ${N _2}$, ${Mg _3N _2}$

  2. ${N _2}$, ${NH _3}$, $Mg _3N _2$

  3. ${N _2}$, ${N _2O _5}$, ${Mg(NO _3) _2}$

  4. ${NH _3}$, ${NO _2}$, ${Mg(NO _2) _2}$

Show answer
Correct Option: A
Explanation:

Reactions :
$CaNH+H _2O\rightarrow CaO+NH _3$
$3CaOCl _2 + 2NH _3\rightarrow 3CaCl _2 + 3H _2O + N _2$
$3Mg + N _2 \rightarrow Mg _3N _2$
$Mg _3N _2 + 6 H _2O \rightarrow 3Mg(OH) _2 + 2NH _3$

Natural gas is a major feed stock for the production of ________

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

  1. Ammonia

  2. potassium

  3. sodium

  4. phosphorus

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Correct Option: A

$NH _3$ can't be obtained by :

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

  1. heating of $NH _4NO _3$ or $NH _4NO _2$

  2. heating $NH _3CI$ or $(NH _4) _2CO _3$

  3. heating of $NH _4NO _3$ with $NaOH$

  4. reaction of $AIN$ or $Mg _3N _2$ or $CaCN _2$ with $H _2O$

Show answer
Correct Option: A
Explanation:

Reactions are:
$NH _4NO _3\rightarrow N _2O+H _2O$
$NH _4NO _2\rightarrow N _2+H _2O$
$NH _4Cl\rightarrow NH _3+HCl$
$NH _4NO _3 (aq) + NaOH(s)\rightarrow NH _3(g) +H _2O (l)+ NaNO _3(aq)$
$CaCN _2+3H _2O\rightarrow CaCO _3+NH _3$

$Fe^{2+}$ reduces $NH _2OH$ to : 

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

  1. $NH _3$

  2. $N _3H$

  3. $N _2H _4$

  4. $N _2$

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Correct Option: A

Calcium cyanamide on treatment with steam produces :

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

  1. $NH _3+CaO$

  2. $NH _3+CaHCO$

  3. $NH _3+CaCO _3$

  4. $NH _3+Ca(OH) _2$

Show answer
Correct Option: C
Explanation:

Reaction:
$CaCN _2+3H _2O\rightarrow CaCO _3+NH _3$

$NH _4CI(s)$ is heated in a test tube, vapours are brought in contact with red litmus paper, which changes to blue and then to red. it is because of : 

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

  1. formation of $NH _4OH$ and $HCI$

  2. formation of $NH _3$ and $HCI$

  3. greater diffusion of $NH _3$ than $HCI$

  4. grater diffusion of $HCI$ than $NH _3$

Show answer
Correct Option: C
Explanation:

$NH _4Cl\xrightarrow{\Delta} NH _3+HCl$
First HCl reacts with red litmus and converts it into blue but as diffusion of ammonia is high so after that ammonia reacts with blue litmus and converts back to red.