Preparations and Uses of Sodium Carbonate

Q.

For making a cake, baking powder is taken. If at home, your mother uses baking soda instead of baking powder in cake, (a) how will it affect the taste of the cake and why? (b) how can baking soda be converted into baking powder? (c) what is the role of tartaric acid added to baking soda?

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.

How do you test for hydrogen chloride gas?

Q. The reaction sodium carbonate with excess calcium hydroxide produces:

1. Caustic potash
2. Baryta
3. Slaked lime
4. Caustic soda

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.

Why ${\mathrm{MnO}}_2$ is used in dry cell?

Q.

To prepare a buffer of $\mathrm{pH}8.26$ amount of ${\left({\mathrm{NH}}_4\right)}_2{\mathrm{SO}}_4$ to be added to $500\mathrm{mL}\mathrm{of}0.01\mathrm{M}{\mathrm{NH}}_4\mathrm{OH}$ solution is $\left[{\mathrm{pK}}_{\mathrm{a}}\right({\mathrm{NH}}_4^{+})=9.26]$:

1. $0.05\mathrm{mole}$

2. $0.025\mathrm{mole}$

3. $0.10\mathrm{mole}$

4. $0.005\mathrm{mole}$

Q.

Write the chemical formula for Sodium carbonate decahydrate.

Q. Sodium carbonate reacts with $S{O}_2$ in aqueous solution to give

1. 
2. 
3. 
4. 

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.

Name two carbonates salts which do not produce carbon dioxide on heating.

Q. Sodium carbonate or washing soda or soda ash is the

1. ammonium salt of carbonic
2. potassium salt of carbonic acid.
3. sodium salt of sulphate acid acid
4. sodium salt of carbonic acid

Q. The hydrolysis of sodium carbonate involves the reaction between:

1. $N{a}^{+}$ and water
2. $N{a}^{+}$ and $O{H}^{-}$
3. $C{O}_3^{2-}$ and water
4. $C{O}_3^{2-}$ and $H^{+}$

Q. What are the raw materials used in solvay's process for the preparation of sodium carbonate?

1. $NaCl,N{H}_3,CaC{O}_3$
2. $NaOH,C{O}_2$
3. $NaCl,CaC{O}_3,C,H_{2}S{O}_4$
4. $N{H}_3,H_{2}O,NaCl$

Q. $\text{Cyclohexanol}\underset{\Delta }{\overset{\text{conc.}{H}_{2}S{O}_4}{\to }}\left(A\right)\stackrel{NBS}{\to }\left(B\right)\stackrel{LiAl{D}_4}{\to }\left(C\right)$

Product (C) is:

1. 
2. 
3. 
4. 

Q.

IN the synthesis of sodium carbonate, the recovery of ammonia is done by treating $N{H}_{4}Cl$ with $Ca(OH{)}_2$ The by product obtained in this process is
(a) $CaC{l}_2$ (b) NaCl (c) NaOH (d) $NaHC{O}_3$

Q.

The addition of solid sodium carbonate to pure water causes

1. An increase in hydronium ion concentration

2. An increase in alkalinity

3. No change in acidity

4. A decrease in hydroxide ion concentration

Q. A colourless solid $\left(X\right)$ on heating evolved $C{O}_2$ and also gave a white residue, soluble in water. Residue also gave $C{O}_2$ when treated with dilute acid. $\left(X\right)$ is:

1. $CaC{O}_3$
2. $N{a}_{2}C{O}_3$
3. $Ca(HC{O}_3{)}_2$
4. $NaHC{O}_3$

Q.

A compound containing silicon and oxygen is:

1. Common salt

2. Sand

3. Sodium carbonate

4. Sugar

Q. $C{O}_2$ gas along with solid (Y) is obtained when sodium salt (X) is heated. (X) is again obtained when $C{O}_2$ gas is passed into aqueous solution of (Y). Identify (X) & (Y) respectively

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

Q.

Several sodium compounds find use in industries. Which of the following compounds are used for textile industry?
9 a) $N{a}_{2}C{O}_3$ (b) $NaHC{O}_3$ (c) NaOH (d) NaCl

Q. In solvay process the Ca and Mg impurities from brine solution are removed as

1. Carbonates
2. Sulphates
3. Bicarbonates
4. None of the above

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.

The number of water molecules present in Glaubers salt is _________.

Q.

What is baking powder a mixture of?

Q.

Why is oxide of a non metal called basic oxide?

Q. An inorganic substance liberates oxygen on heating and turns an acidic solution of $KI$ brown and reduces acidified $KMn{O}_4$ solution. The substance is:

1. $HgO$
2. $H_2{O}_2$
3. $KN{O}_3$
4. $Pb(N{O}_3{)}_2$

Q.

Write the word equation for the following reactions.

Hydrogen combines with chlorine to form hydrogen chloride.

Q.

The formula of soda ash is
(a) $N{a}_{2}C{O}_3.10H_{2}O$ (b) $N{a}_{2}C{O}_3.2H_{2}O$
(c) $N{a}_{2}C{O}_3.H_{2}O$ (d) $N{a}_{2}C{O}_3$

Q.

Describe two important uses of each of the following: (i) caustic soda (ii) sodium carbonate (iii) quicklime.