Tag: preparation of ammonia-laboratory method and haber's process

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

$NH _3$ can't be obtained by :

  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 $H _2O$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

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

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

$NH _4CI(s)$ 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 : 

  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 $NH _3$
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

Give the balanced reaction for the manufacture of the ammonia gas.

  1. $3{ N } _{ 2 }+3{ H } _{ 2 }\rightarrow 6{ NH } _{ 3 }$
  2. ${ N } _{ 2 }+3{ H } _{ 2 }\rightarrow 2{ NH } _{ 3 }$
  3. ${ N } _{ 2 }+3{ H } _{ 2 }\rightarrow { NH } _{ 3 }$
  4. ${ N } _{ 2 }+6{ H } _{ 2 }\rightarrow 4{ NH } _{ 3 }$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

${ N } _{ 2 }+3{ H } _{ 2 }\rightarrow 2{ NH } _{ 3 }$
In the manufacture of ammonia process employed is Haber-Bosch which occurs in the presence of catalyst at high temperature and high pressure.

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

Which of the following reaction represents the balanced form of conversion of Ca to ammonia?

  1. ${ 2NH } _{ 4 }Cl+Ca\left( OH \right) _{ 2 }\xrightarrow { \triangle } { CaCl } _{ 2 }+{ 2H } _{ 2 }O+{ 2NH } _{ 3 }$
  2. ${ NH } _{ 4 }Cl+Ca\left( OH \right) _{ 2 }\xrightarrow { \triangle } { CaCl } _{ 2 }+{ 2H } _{ 2 }O+{ NH } _{ 3 }$
  3. ${ 2NH } _{ 4 }Cl+3Ca\left( OH \right) _{ 2 }\xrightarrow { \triangle } 3{ CaCl } _{ 2 }+{ 2H } _{ 2 }O+{ 2NH } _{ 3 }$
  4. ${ 4NH } _{ 4 }Cl+Ca\left( OH \right) _{ 2 }\xrightarrow { \triangle } 2{ CaCl } _{ 2 }+{ 2H } _{ 2 }O+{ 2NH } _{ 3 }$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The balanced chemical equation for the laboratory preparation of ammonia from ammonium chloride and calcium hydroxide is 2NH4Cl + Ca(OH)2 -> CaCl2 + 2H2O + 2NH3. Option A correctly balances all atoms: 2 nitrogen, 8 hydrogen, 2 chlorine, 2 calcium, 2 oxygen. Options B-D have unbalanced stoichiometry - they don't account for the 2:1 ratio of ammonium chloride to calcium hydroxide needed.

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

Equation for the following reaction.
$Cu+{ xHNO } _{ 3 }\rightarrow Cu\left( { NO } _{ 3 } \right) _{ 2 }+{ 2H } _{ 2 }O+{ 2NO } _{ y }$
Find the value of $x$ and $y$.

  1. $x=4, y= 2$
  2. $x=1, y= 2$
  3. $x=2, y= 2$
  4. $x=4,, y= 1$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

$Cu+{ 4HNO } _{ 3 }\rightarrow Cu\left( { NO } _{ 3 } \right) _{ 2 }+{ 2H } _{ 2 }O+{ 2NO } _{ 2 }$