Common Salt

Q. What is slaked lime, quick lime, lime water. What are their uses?

Q.

Identify the correct representation of the reaction occurring during the chloralkali process

1. $2\mathrm{NaCl}\left(\mathrm{l}\right)+2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)\to 2\mathrm{NaOH}\left(\mathrm{l}\right)+{\mathrm{Cl}}_2\left(\mathrm{g}\right)+{\mathrm{H}}_2\left(\mathrm{g}\right)$

2. $2\mathrm{NaCl}\left(\mathrm{aq}\right)+2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{aq}\right)\to 2\mathrm{NaOH}\left(\mathrm{aq}\right)+{\mathrm{Cl}}_2\left(\mathrm{g}\right)+{\mathrm{H}}_2\left(\mathrm{g}\right)$

3. $2\mathrm{NaCl}\left(\mathrm{aq}\right)+2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)\to 2\mathrm{NaOH}\left(\mathrm{aq}\right)+{\mathrm{Cl}}_2\left(\mathrm{aq}\right)+{\mathrm{H}}_2\left(\mathrm{aq}\right)$

4. $2\mathrm{NaCl}\left(\mathrm{aq}\right)+2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)\to 2\mathrm{NaOH}\left(\mathrm{aq}\right)+{\mathrm{Cl}}_2\left(\mathrm{g}\right)+{\mathrm{H}}_2\left(\mathrm{g}\right)$

Q. The gas evolved at anode during the electrolysis of brine is

1. $C{l}_2$
2. $H_2$
3. $O_2$
4. HCl

Q.

How is common salt obtained from sea - water ?

Q.

Identify the acid and the base from which sodium chloride is obtained. Which type of salt is it? When is it called rock salt? How is rock salt formed?

Q.

How washing soda is obtained from baking soda write balanced chemical equation

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

1. Sodium hydroxide solution is formed near the cathode
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. It utilises brine solution

Q.

Write the names and chemical formula of the products formed by the action of chlorine on slaked lime.

Q. What is margarine? How is it obtained ?

Q.

Name the chemicals obtained from common salt:

1. NaOH

2. NaHCO₃

3. Washing soda

4. Baking soda

Q.

Write the chemical name and formula of (a) common salt, and (b) caustic soda.

Q.

Question 11.
Common salt besides being used in kitchen can also be used as the raw material for making
(i) washing soda
(ii) bleaching powder
(iii) baking soda
(iv) slaked lime

Choose the correct option from the following:
(a) (i) and (ii)
(b) (i), (ii) and (iv)
(c) (i) and (iii)
(d) (i), (iii) and (iv)

Q.

On electrolysis of $HCOONa\left(aq\right)$, Hydrogen gas is produced at which electrode?

Q.

Give a suitable chemical term for -

a salt formed by the incomplete neutralization of an acid molecule by a base radical.

Q.

When electricity is passed through a common salt solution, sodium hydroxide is produced along with the liberation of two gases ‘X’ and ‘Y’. The gas ‘X’ burns with a pop sound whereas ‘Y’ is used for disinfecting water.

1. Identify X and Y.
2. Give the chemical reaction for the reaction stated above.
3. State the reaction of Y with dry slaked lime.

Q. WHAT IS CHLORIDE OF LIME?
HOW IS IT DIFFERENT FROM CALCIUM CHLORIDE?

Q.

What are the physical properties of salts.

Q.

Which of the following processes is called chlor-alkali process?

1. Ca(OH)₂ + Cl₂ → CaOCl₂ + H₂O

2. NaCl + H₂O + CO₂ + NH₃ → NH₄Cl + NaHCO₃

3. 2NaCl_(aq) + 2H₂O_(l) → 2NaOH_(aq) + Cl_2(g) + H_2(g)

4. None of the above

Q. sodium hydrogen carbonate is used in baking powder . during heating it decomposes to form sodium carbonate which has a soapy taste. how do baking powder manufacturers overcome this problem

Q.

Solution made with water is called ____________.

Q.

What name is given to the common salt which is mined from underground deposits ? How was this salt formed ?

Q.

Name the major salt present in sea-water.

Q.

Which soft metal combines with chlorine to make table salt?

1. Sodium

2. Scandium

3. Silicon

4. Sulfur

Q.

216. Sodium chloride was used an important symbol in our freedom struggle. Mahatma Gandhi and his followers did Dandi march in order to stop the British government from increasing the price of common salt used daily by Indian people.

(d) What are the uses of common salt?

Q.

Give any two uses of common salt (sodium chloride).

Q. Question 1
What is the common name of the compound ${\text{CaOCl}}_2$?

Q. Write the name of the compound which is
1. A component of washing soda.
2. Used as an oxidising agent in many chemical industries .

Q.

What is the difference between chloride of lime and calcium chloride?

Q.

Name the source from where sodium chloride is obtained

Q.

What is the raw material for chloro alkali process?