Preparations and Uses of Sodium Carbonate

Q.

Mention the reaction that takes place during whitewashing.

Q.

From the list of the following salts choose the salt that most appropriately fits the description in the following:

$[\mathrm{AgCl},{\mathrm{MgCl}}_2,{\mathrm{NaHSO}}_4,{\mathrm{PbCO}}_3,{\mathrm{ZnCO}}_3,{\mathrm{KNO}}_3,\mathrm{Ca}{\left({\mathrm{NO}}_3\right)}_2]$

(i) On heating this salt gives a yellow residue when hot and white when cold.

(ii) On heating this salt, a brwon-colored gas is evolved.

Q. Which of the following compounds is not used for the preparation of $N{a}_{2}C{O}_3$ by Solvay process?

1. NaCl
2. NaOH
3. $N{H}_3$
4. $C{O}_2$

Q.

Sodium carbonate is manufactured by the:

1. Deacon process

2. Solvay process

3. Chlor-alkali process

4. Frasch process

Q. The pair of compounds which cannot exist together in solution is

1. $NaHC{O}_3$ and $NaOH$
2. $NaHC{O}_3$ and $H_{2}O$
3. $NaHC{O}_3$ and $N{a}_{2}C{O}_3$
4. $N{a}_{2}C{O}_3$ and $NaOH$

Q. $N{a}_{2}C{O}_3.10H_{2}O$, when exposed to air, looses water of crystallization and finally gives:

1. $N{a}_{2}C{O}_3.4H_{2}O$
2. $N{a}_{2}C{O}_3.H_{2}O$
3. $N{a}_{2}C{O}_3.7H_{2}O$
4. $N{a}_{2}C{O}_3.9H_{2}O$

Q. On heating which of the following releases $C{O}_2$ most easily?

1. $N{a}_{2}C{O}_3$

2. $CaC{O}_3$

3. $MgC{O}_3$

4. $K_{2}C{O}_3$

Q. On heating which of the following releases $C{O}_2$ most easily?

1. $N{a}_{2}C{O}_3$

2. $CaC{O}_3$

3. $MgC{O}_3$

4. $K_{2}C{O}_3$

Q. Which of the following compounds is not used for the preparation of $N{a}_{2}C{O}_3$ by Solvay process?

1. NaCl
2. NaOH
3. $N{H}_3$
4. $C{O}_2$

Q. Solvay (ammonia soda) process is used for the manufacture of ?

1. Caustic soda
2. Washing soda
3. None of the above
4. sodium sulphate

Q. Which of the following is the chemical formula for washing soda?

Q. In the manufacture of sodium carbonate, the following reactions are involved:
$\text{(A)}\stackrel{\Delta }{\to }\text{(B)}+{\text{CO}}_2$
$\text{(B)}+{\text{H}}_2\text{O}\to \text{(C)}\stackrel{N{H}_{4}Cl}{\to }\text{(D)}$
$\text{(E)}+{\text{CO}}_2\to \text{(F)}$
$\text{(F)}+\text{NaCl}\to \text{G}\stackrel{Heat}{\to }{\text{Na}}_2{\text{CO}}_3+{\text{CO}}_2+{\text{H}}_2\text{O}$
${\text{(D) is a gas which is soluble in H}}_2\text{O}$

The name of the process is:

1. Solvay
2. Salt cake
3. Lowig
4. Gossage