Preparations and Uses of Sodium Bicarbonate and Common Salt

Q. A $10mg$ effervescent tablet containing sodium bicarbonate and oxalic acid releases $0.25ml$ of $C{O}_2$ at $T=298.15K$ and $p=1$ bar. If molar volume of $C{O}_2$ is $25.0L$ under such condition, what is the percentage of sodium bicarbonate in each tablet?
$[\text{Molar mass of}NaHC{O}_3=84gmo{l}^{-1}]$

1. $16.8$
2. $0.84$
3. $33.6$
4. $8.4$

Q. The raw materials used in solvay's process are as follows :

1. NaCl, CaCO₃, C, H₂SO₄

2. NaOH, CO₂

3. NaCl, CO₂

4. NaCl, NH₃, CaCO₃

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

(G) is $NaHC{O}_3$. The other compound formed with (G) is

1. $N{H}_{4}Cl$
2. $N{H}_{4}OH$
3. $CaC{l}_2$
4. None of these

Q. A sodium salt on treatment with $MgC{l}_2$ gives white precipitate only one heating. The anion of the sodium salt is

1. $HC{O}_3^{-}$
2. $C{O}_3^{2-}$
3. $N{O}_3^{-}$
4. $S{O}_4^{2-}$

Q. The addition of $N{a}_{2}C{O}_3$, to the aqueous solution of an oxide produces $C{O}_2$. This reaction indicates that

1. Oxide is basic
2. Oxide is neutral
3. Oxide is that of a metal
4. Oxide is that of a non-metal

Q. The commercial $NaCl$ salt is purified by passing

1. $HCl$ gas through a saturated salt solution
2. $H_2$ gas through a saturated salt solution
3. $H_{2}S$ gas through an alkaline salt solution
4. $C{l}_2$ gas through a saturated salt solution

Q. $NaHC{O}_3$ solution is

1. weakly acidic
2. strongly basic
3. strongly acidic
4. weakly basic

Q. NaCl can be used in preparation of which of the following compounds?

1. $N{a}_2{O}_2$
2. $N{a}_{2}S{O}_4$
3. $NaOH$
4. $N{a}_{2}C{O}_3$

Q. Which of the following objects are soluble in water?

1. Table salt
2. Fodder
3. Clay
4. Chalk powder

Q.

What are the two main ways in which common salt (sodium chloride) occurs in nature ?