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Standard XII

Chemistry

Synthesis by Reduction of Nitriles

First step of...

Question

First step of urea manufacture is $2 N H_{3} + C O_{2} ⇌ X$
Compound $X$ is:

N H_{2} C O O N H_{4}

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N H_{2} C O O H

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N H_{4} C O O H

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Both

A

and

B

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Solution

The correct option is A $N H_{2} C O O N H_{4}$
The first is carbamate formation: the fast exothermic reaction of liquid ammonia with gaseous carbon dioxide at high temperature and pressure to form ammonium carbamate ( $H_{2} N - C O O - N H_{4}$ ).
$2 N H_{3} + C O_{2} ⇌ H_{2} N - C O O - N H_{4}$

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Similar questions

Q. Urea

(N H_{2} C O N H_{2})

is formed when

C O_{2}

reacts with

N H_{3}

C O_{2} + 2 N H_{3} ⟶ N H_{2} C O N H_{2} + H_{2} O

N H_{3}

and

C O_{2}

are obtained in the following steps:

I

N_{2} + 3 H_{2} 90 % - - \to 2 N H_{3}

I I

C a C O_{3} 50 % - - \to C a O + C O_{2}

Amount of

N_{2}

and

C a C O_{3}

required to produce

60

kg of urea are

X

kg and

Y

kg respectively. The value of

X + Y

(nearest integer value ) is :

Q. For the heterogenous equilibrium with pressure P (At equilibrium)

N H_{2} C O O N H_{4} (s) \to 2 N H_{3} + C O_{2}

The value of

K_{P}

is:

Q. For the decomposition,

N H_{2} C O O N H_{4} (s) ⇌ 2 N H_{3} (g) + C O_{2} (g)

;

K_{p} = 2.9 \times 10^{- 5} a t m^{3}

The total pressure of gases at equilibrium when 1.0 mol of

N H_{2} C O O N H_{4} (s)

was taken to start with, would be :

646g of ammonia is allowed to react with 1.144kg of CO2 to form urea identify the limiting reagent calculate the amount of urea formed and interacted quality of excess agent

2NH3+CO2----------- NH2CONH2+H2O

Ammonium carbonate decomposes as
$N H_{2} C O O N H_{4} (s) ⇋ 2 N H_{3} (g) + C O_{2} (g)$ For the reaction, $K_{P} = 2.9 \times 10^{- 5} a t m^{3}$ . Calculate the total pressure at equilibrium if $1 m o l e o f N H_{2} C O O N H_{4}$ is taken.

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First step of urea manufacture is 2NH3 + CO2⇌XCompound X is:

The correct option is A NH2COONH4The first is carbamate formation: the fast exothermic reaction of liquid ammonia with gaseous carbon dioxide at high temperature and pressure to form ammonium carbamate (H2N−COO−NH4). 2NH3+CO2⇌H2N−COO−NH4

First step of urea manufacture is $2 N H_{3} + C O_{2} ⇌ X$
Compound $X$ is: