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

Quizzes (0) Questions (69)

Questions Related to preparation of ammonia-laboratory method and haber's process

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

How is ammonia collected?

  1. Ammonia is less dense than air so it is collected by upward delivery.

  2. Ammonia is more dense than air so it is collected by upward delivery.

  3. Ammonia is more dense than air so it is collected by downward delivery.

  4. None of the above.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ammonia is less dense than air so it is collected by upward delivery or gas syringe method.
In upward delivery method a gas jar is connected by a tube to flask that is giving off gas. The gas that is less dense than air rises to the top of gas jar. The air in the gas jar is displaced until the gas jar is filled with collected gas. Ammonia is very soluble gas so the collection apparatus should be dry and not collected over water.

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

Write the balanced equation for the preparation of $NH _3$ from ammonium chloride and calcium hydroxide.

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

${ 2NH } _{ 4 }Cl+Ca\left( OH \right) _{ 2 }\rightarrow 2{ NH } _{ 3 }+{ CaCl } _{ 2 }+{ 2H } _{ 2 }O$

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

Which reaction of ammonia forms the first step of Ostwald's process?

  1. The catalytic oxidation of ammonia by platinum catalyst

  2. The catalytic oxidation of ammonia by cobalt catalyst

  3. The catalytic reduction of ammonia by platinum catalyst

  4. The oxidation of ammonia
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The first step of Ostwald's process is the catalytic oxidation of ammonia by platinum catalyst for the formation of nitric acid.

$NH _3+O _2 \xrightarrow {Pt} NO+ H _2O$

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

$N _2(g) + 3H _2(g)\overset{Fe+Mo}{\rightleftharpoons}2NH _3(g)$; Haber's process.

Mo is used as :

  1. a catalyst

  2. a catalytic promoter

  3. an oxidising agent

  4. a catalytic poison
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

$NH _3$ is manufactured by Haber's process.
$N _2(g) + 3H _2(g)\overset{Fe+Mb}{\rightleftharpoons}2NH _3(g)$
In this process, pure nitrogen and hydrogen gases react in the ratio of $1:3$ by volume in $400^0C-500^0C$ temperature, $200-900$ atm pressure in presence of iron as catalyst and Mo as promoter.

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

 In commercial industry, ammonia is prepared by :

  1. decomposition of salts

  2. contact process

  3. arc process

  4. combining hydrogen and nitrogen gases (Haber process)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

 In commercial industry, ammonia is prepared by combining hydrogen and nitrogen gases (Haber process).
$N _2 + 3H _2 \rightleftharpoons 2NH _3+24\ kcal$

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

What are the missing products of the following reaction? $\displaystyle { NH } _{ 4 }Cl+{ Ca\left( OH \right)  } _{ 2 }\rightarrow \ _ \ _ \ _ +Ca{ Cl } _{ 2 }$

  1. $\displaystyle { N } _{ 2 }$
  2. $\displaystyle { NH } _{ 3 }$
  3. $\displaystyle { H } _{ 2 }O$
  4. $\displaystyle { NH } _{ 3 }+{ N } _{ 2 }$
  5. $\displaystyle { NH } _{ 3 }+{ H } _{ 2 }O$
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Calcium hydroxide reacts with ammonium chloride to give ammonia, water and calcuim chloride.

${ 2NH } _{ 4 }Cl+Ca{ (OH) } _{ 2 }\rightarrow { 2NH } _{ 3 }+{ 2H } _{ 2 }O+{ CaCl } _{ 2 }$

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

Pressure is increased in the Haber process for making ammonia. It favors :

  1. the reverse reaction

  2. the forward reaction

  3. neither reaction

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

Pressure is increased in the Haber process for making ammonia. It favors the forward reaction.
$\displaystyle N _2 + 3H _2 \rightarrow 2NH _3$
The reaction proceeds with decrease in the number of moles of gaseous species. With increase in pressure, the equilibrium shifts in forward direction with decrease in the number of moles of gaseous species so that, the effect of increased pressure is nullified.