Preparation of Sodium Hydroxide

Q.

What is the chlor-alkali process and why it is called so?

Q. What happens when electricity is passed through acidified water

Q. On heating sodium hydrogen carbonate, it decomposes to form

1. sodium bicarbonate, water and oxygen.
2. sodium bicarbonate, water and carbon dioxide.
3. sodium carbonate, water and oxygen.
4. sodium carbonate, water and carbon dioxide.

Q. Which of the following is incorrect regarding chlor-alkali process?

1. It utilises brine solution
2. Reaction involved is:
   $2NaCl\left(aq\right)+2H_{2}O\left(l\right)\to 2NaOH\left(aq\right)+C{l}_2\left(g\right)+H_2\left(g\right)$
3. Hydrogen gas is given out at the anode
4. Sodium hydroxide solution is formed near the cathode

Q. Choose the correct option regarding the chlor-alkali reaction:

1. $C{l}_2$ is given off at the cathode.
2. Brine solution decomposes on the application of electricity.
3. $H_2$ is given off at the anode.
4. All of the above.

Q. In chlor-alkali process, and are released at cathode and anode respectively.

1. ${\mathrm{Cl}}_2$
2. $H_2$
3. $O_2$
4. $\mathrm{NaCl}$

Q. During the chlor-alkali process, which gas is liberated​ at anode and cathode, respectively?

Q.

What is Chloro-Alkali process?

Q.

Which of the following is an example of non-aqueous solution?

1. Sugar Solution

2. Mud Solution

3. Salt Solution

4. Solution of sulphur in carbon disulphide

Q.

Fats + NaOH → ........+ Glycerol. Name the other product formed in this reaction is:

1. Soap

2. Cloth

3. Paper

4. Wood

Q.

What are the advantages of preparing solutions?

Q.

Give one example each of a chemical reaction showing the following characteristics:

Change of state from liquid to gas.

Q.

Choose the correct option:

1. All of the given options are correct.

2. In Chlor-alkali process, Cl₂ is given off at anode and H₂ is given off at cathode.

3. In Chlor-alkali process, Cl₂ is given off at cathode and H₂ is given off at anode.

4. In Chlor-alkali process, NaHCO₃ is produced.

Q. Which one of the following reactions is not associated with the Solvay process of manufacture of sodium carbonate?

1. $2NaOH+C{O}_2\to N{a}_{2}C{O}_3+H_{2}O$
2. $2NaHC{O}_3\to N{a}_{2}C{O}_3+H_{2}O+C{O}_2$
3. $N{H}_3+H_{2}O+C{O}_2\to N{H}_{4}HC{O}_3$
4. $NaCl+N{H}_{4}HC{O}_3\to NaHC{O}_3+N{H}_{4}Cl$

Q. Which of the following is incorrect regarding chlor-alkali process?

1. It utilises brine solution
2. Reaction involved is:
   $2NaCl\left(aq\right)+2H_{2}O\left(l\right)\to 2NaOH\left(aq\right)+C{l}_2\left(g\right)+H_2\left(g\right)$
3. Hydrogen gas is given out at the anode
4. Sodium hydroxide solution is formed near the cathode

Q.

Complete the reaction
NaHCO₃ + CH₃COOH →

Q. In soap industry, ___ is used to treat vegetable oils or animal fats.

1. Sodium hydroxide
2. Potassium hydroxide
3. Strong base/alkali
4. All of these

Q. Identify the correct representation of reaction occurring during chloro-alkali process.

1. $2NaCl\left(l\right)+2H_{2}O\left(l\right)\to 2NaOH\left(l\right)+C{l}_2\left(g\right)+H_2\left(g\right)$
2. $2NaCl\left(s\right)+2H_{2}O\left(aq\right)\to 2NaOH\left(aq\right)+C{l}_2\left(g\right)+H_2\left(g\right)$
3. $2NaCl\left(aq\right)+2H_{2}O\left(l\right)\to 2NaOH\left(aq\right)+C{l}_2\left(aq\right)+H_2\left(aq\right)$
4. $2NaCl\left(aq\right)+2H_{2}O\left(l\right)\to 2NaOH\left(aq\right)+C{l}_2\left(g\right)+H_2\left(g\right)$

Q.

Which compound acts as a solvent in aqueous solution?

1. HCl

2. H₂O

3. H₂SO₄

4. HNO₃

Q. 7. how to prevent salt from clumping by using compounds ?

Q. Choose the correct option regarding chlor-alkali reaction:

1. Brine solution decomposes on the application of electricity.
2. $C{l}_2$ is given off at the cathode.
3. $H_2$ is given off at the anode.
4. All of the above.

Q.

Give the chemical formula of washing soda.

Q.

What is Brine Solution?

Q. In chlor-alkali process, and are released at cathode and anode respectively.

1. ${\mathrm{Cl}}_2$
2. $H_2$
3. $O_2$
4. $\mathrm{NaCl}$

Q. Complete the following reaction:
$+H_{2}O\left(l\right)+C{O}_2\left(g\right)+N{H}_3\left(g\right)\to$$+{\mathrm{NH}}_4\mathrm{Cl}\left(\mathrm{aq}\right)$

1. $NaCl$(aq)
2. $N{a}_{2}C{O}_3$(aq)
3. $NaHC{O}_3$(s)
4. $N{a}_{2}C{O}_3$(s)

Q. In the soap industry, ___ is used to treat vegetable oils or animal fats.

1. Sodium hydroxide
2. Potassium hydroxide
3. Strong base/alkali
4. All of these

Q. Complete the following reaction:
$+H_{2}O\left(l\right)+C{O}_2\left(g\right)+N{H}_3\left(g\right)\to$$+{\mathrm{NH}}_4\mathrm{Cl}\left(\mathrm{aq}\right)$

1. $NaCl$(aq)
2. $N{a}_{2}C{O}_3$(aq)
3. $NaHC{O}_3$(s)
4. $N{a}_{2}C{O}_3$(s)

Q. Complete the following reaction:
$+H_{2}O\left(l\right)+C{O}_2\left(g\right)+N{H}_3\left(g\right)\to$$+{\mathrm{NH}}_4\mathrm{Cl}\left(\mathrm{aq}\right)$

1. $N{a}_{2}C{O}_3$(aq)
2. $NaHC{O}_3$(s)
3. $N{a}_{2}C{O}_3$(s)
4. $NaCl$(aq)

Q. ${Fe}_2{(SO}_4{)}_3$ solution:

1. Turns blue litmus red
2. Turns phenolphthalein solution pink
3. Both (b) and c)
4. Turns red litmus blue

Q.

what is hard water?