Advertisements
Advertisements
प्रश्न
Name the raw material used for the production of caustic soda.
Advertisements
उत्तर
Sodium chloride (NaCl)
APPEARS IN
संबंधित प्रश्न
Write a balanced chemical equation for the following:
Action of dilute hydrochloric acid on magnesium sulphite.
Write the chemical name and formula of common salt.
What are the two main ways in which common salt (sodium chloride) occurs in nature?
Rock salt is mined just like ______.
Explain how anhydrous copper sulphate can be used to detect the presence of moisture (water) in a liquid.
What happens when copper sulphate crystals are heated strongly? Explain with the help of an equation.
Explain why chlorine is used for sterilising drinking water supply.
What is a salt?
Give one example of a salt which gives an aqueous solution having:
pH less than 7
Give one example of a salt which gives an aqueous solution having:
pH equal to 7
Consider the following salts:
Na2CO3, NaCl, NH4Cl, CH3COONa, K2SO4, (NH)2SO4
Which of these salts will give:
- acidic solutions?
- neutral solutions?
- basic solutions (or alkaline solutions)?
A salt X when dissolved in distilled water gives a clear solution which turns red litmus blue. Explain the phenomenon.
The pH values of three solutions A, B and C are given in the table. Answer the folloiwng questions:
| Solution | pH value |
| A | 12 |
| B | 2 |
| C | 7 |
Which solution will liberate CO2 when reacted with sodium carbonate?
Taking sodium carbonate as an example, give the meaning of the following terms:
Water of crystallization
State what would you observe when :
The salt ferric chloride is exposed to the atmosphere.
Distinguish by a chemical test sodium carbonate and sodium sulphite.
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?
A salt that is formed by the complete neutralization of an acid and a base is called ______ salt.
An aqueous solution of a salt turns blue litmus to red. The salt could be the one obtained by the reaction of ______.
