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Standard X

Chemistry

Characteristics of s- Block Elements

In Leblanc pr...

Question

In Leblanc process,sodium carbonate is obtained by reduction of:

N a C l

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N a H S O_{4}

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N a_{2} S O_{4}

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N a_{2} S

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Solution

The correct option is A $N a_{2} S O_{4}$
In Leblanc process, sodium sulphate is reduced with coke and treated with limestone to obtain sodium carbonate.
${N a}_{2} S O_{4} + 4 C \to {N a}_{2} S + 4 C O {N a}_{2} S + C a {C O}_{3} \to {N a}_{2} {C O}_{3} + C a S$

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Q. What's the difference between these two rxns
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250 m l

of a sodium carbonate solution contains

2.65

grams of

{N a}_{2} {C O}_{3}

10 m l

of this solution is added to

^{'} x^{'} m l

of water to obtain

0.001 M

{N a}_{2} {C O}_{3}

solution.

What is the value of

^{'} x^{'}

m l

[Molecular weight of

{N a}_{2} {C O}_{3} = 106]

Q. In the synthesis of sodium carbonate by solvay (or ammonia-soda) process, the recovery of ammonia is done by treating

N H_{4} C l

with

C a (O H)_{2}

. The by-product obtained in this process is:

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In Leblanc process,sodium carbonate is obtained by reduction of:

The correct option is A Na2SO4In Leblanc process, sodium sulphate is reduced with coke and treated with limestone to obtain sodium carbonate.Na2SO4+4C→Na2S+4CONa2S+CaCO3→Na2CO3+CaS

The correct option is A $N a_{2} S O_{4}$
In Leblanc process, sodium sulphate is reduced with coke and treated with limestone to obtain sodium carbonate.
${N a}_{2} S O_{4} + 4 C \to {N a}_{2} S + 4 C O {N a}_{2} S + C a {C O}_{3} \to {N a}_{2} {C O}_{3} + C a S$