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प्रश्न
Name three products of the chlor-alkali process. State two uses of each of these products.
उत्तर
The three main products of the chlor-alkali process are H2, Cl2 and NaOH.
Uses of sodium hydroxide:
(i) It is used for making soaps and detergents.
(ii) It is used for making synthetic textile fibre (such as rayon).
Uses of chlorine:
(i) It is used in the production of bleaching powder.
(ii) It is used to sterilise drinking water supply and the water in swimming pools, because it is a disinfectant.
Uses of hydrogen:
(i) It is used in the hydrogenation of oils to obtain solid fats called vegetable ghee.
(ii) Liquid hydrogen is used as a fuel for rockets.
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संबंधित प्रश्न
From the list of the following salts choose the salt that most appropriately fits the
description is given in the following:
[AgCl, MgCl2, NaHSO4, PbCO3, ZnCO3, KNO3, Ca(NO3)2]
On heating this salt, a brown colored gas is evolved.
Fill in the following blank:
Common salt is obtained from sea-water by the process of.............
Why is the electrolysis of a concentrated solution of sodium chloride known as chlor-alkali process?
Write the names, formulae and colours of any two hydrated salts.
A salt is dissolved in water and the pH of this salt solution is measured with a universal indicator paper. If the pH of solution is less than 7, the salt is most likely to be:
(a) CH3COONa
(b) Na2CO3
(c) KCl
(d) NH4Cl
P and Q are aqueous solutions of sodium chloride and sodium hydroxide, respectively. Which of these will turn:
red litmus blue?
Write the name and formula of one salt each which contains:
five molecules of water of crystallisation
Write any five uses of salts.
The Salt Story
From: The New Indian Express 9 March 2021
The salt pans in Marakkanam, a port town about 120 km from Chennai are the third largest producer of salt in Tamil Nadu. Separation of salt from water is a laborious process and the salt obtained is used as raw materials for manufacture of various sodium compounds.
One such compound is Sodium hydrogen carbonate, used in baking, as an antacid and in soda acid fire extinguishers.
The table shows the mass of various compounds obtained when 1litre of sea water is evaporated.
| COMPOUND | FORMULA | MASS OF SOLID PRESENT /g |
| Sodium Chloride | NaCl | 28.0 |
| Magnesium Chloride | MgCl2 | 8.0 |
| Magnesium Sulphate | MgSO4 | 6.0 |
| Calcium Sulphate | CaSO4 | 2.0 |
| Calcium Carbonate | CaCO3 | 1.0 |
| TOTAL AMOUNT OF SALT OBTAINED | 45.0 | |
How many grams of Magnesium Sulphate are present in 135g of solid left by evaporation of sea water?
An aqueous solution of a salt turns blue litmus to red. The salt could be the one obtained by the reaction of ______.
