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Question

The following flow diagram represents the manufacturing of sodium carbonate?
$2 N H_{3} + H_{2} O + C O_{2} ⟶ (N H_{4})_{2} C O_{3} (a q) (a) ⟶ N H_{4} H C O_{3} (b) ⟶ N a H C O_{3} ↓ (d) N a_{2} C O_{3} + C O_{2} + H_{2} O + (c)$
Which of the following option describes the underlined reagents, products and reaction conditions?

A

(a) - Carbon dioxide, (b) -

N a C l

, (c) -

N H_{4} C l

, (d) - Heat

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B

(a) - Carbon dioxide, (b) -

N a C l

, (c) -

N H_{4} C l

, (d) - Catalyst

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C

(a) - Higher tempt., (b) -

N a C l

, (c) -

N H - 4 C l

, (d) - Heat

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D

(a) - Higher pressure, (b) -

N a C l

, (c) -

N H_{4} C l

, (d) - Catalyst

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Solution

The correct option is A (a) - Carbon dioxide, (b) - $N a C l$ , (c) - $N H_{4} C l$ , (d) - Heat
Ammonium carbonate reacts with carbon dioxide (a) to form ammonium bicarbonate.
$(N H_{4})_{2} C O_{3} + C O_{2} + H_{2} O \to 2 N H_{4} H C O_{3}$
Ammonium bicarbonate reacts with NaCl (b) to form sodium bicarbonate and ammonium chloride (c).
$N H_{4} H C O_{3} + N a C l \to N a H C O_{3} + N H_{4} C l$
Sodium bicarbonate on heating (d) decomposes to sodium carbonate, carbon dioxide and water.
$2 N a H C O_{3} Δ - \to N a_{2} C O_{3} + C O_{2} + H_{2} O$

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Similar questions

Q. In the above reaction if

A

N H_{4} C l

D

C O_{2}

B

C

respectively are :

+ N a O H \to N a C l + N H_{3} + H_{2} O

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

+ N a C l \to (C) + N H_{4} C l

\to N a_{2} C O_{3} + H_{2} O + (D)

(A), (B), (C)

(D)

and give their chemical formulae:
(i)

(A) + N a O H H e a t ⟶ N a C l + N H_{3} + H_{2} O

N H_{3} + C O_{2} + H_{2} O ⟶ (B)

(B) + N a C l ⟶ (C) + N H_{4} C l

(C) H e a t ⟶ N a_{2} C O_{3} + H_{2} O + (D)

Q. The chemical reactions involved in the ammonia soda process are represented as follows:

2 N a C l + C a C O_{3} \to N a_{2} C O_{3} + C a C l_{2}

In the following reactions,

C a C O_{3} Δ - \to [A] + [B]

N a C l + N H_{3} + [B] + H_{2} O \to [C] + [D]

2 [C] \to N a_{2} C O_{3} + H_{2} O + [B]

Identify A to D:

A, B

C

in the following reactions:

$N H_{3} + A + C O_{2} \to {(N H_{4})}_{2} C O_{3}$

${(N H_{4})}_{2} C O_{3} + H_{2} O + B \to N H_{4} H C O_{3}$

$N H_{4} H C O_{3} + N a C l \to N H_{4} C l + C$

Q. Consider the following chemical reactions.

निम्नलिखित रासायनिक अभिक्रियाओं पर विचार कीजिए।

NaCl + H₂O + CO₂ + NH₃ → NH₄Cl + A

A + HCl → NaCl + B + C↑

2 A Heat - - \to D + B + C ↑

Now, identify A, B, C and D and choose the correct option.

अब A, B, C तथा D को पहचानिये तथा सही विकल्प का चयन कीजिए।

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