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प्रश्न
State whether the following statement is true or false:
Copper sulphate crystals are always wet due to the presence of water of crystallisation in them.
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उत्तर
This statement is false.
Explanation:
Copper sulphate crystals contain water of crystallisation, but this water is chemically bound within their solid structure rather than being free liquid water. Consequently, the crystals look and feel completely dry to the touch. This bound water is only responsible for giving the crystals their fixed geometric shape and brilliant blue colour.
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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.
Write a balanced chemical equation for the following:
Action of dilute hydrochloric acid on magnesium sulphite.
The salt prepared by the method of direct combination is _______.
Write the chemical name and formula of common salt.
Why is sodium chloride required in our body?
Why is the electrolysis of a concentrated solution of sodium chloride known as chlor-alkali process?
Give the names and formulae of any two salts. Also name the acids and bases from which these salts may be obtained.
The products of chloro-alkali process are ______.
Which of the following salts will give an aqueous solution having pH of almost 7?
Give one example of a salt which gives an aqueous solution having:
pH equal to 7
Write the name and formula of one salt which contains:
Two molecules of water of crystallisation.
Name a salt whose solubility decreases with temperature.
name two salts which are basic.
State what would you observe when :
Washing soda crystals are exposed to the atmosphere.
Name a colourless gas which bleaches.
Name the anion present in the following compound:
Compound A, when warmed with concentrated sulphuric acid, gives a gas which fumes in moist air and which gives dense white fumes with ammonia.
Distinguish by a chemical test sodium chloride and sodium sulphide.
Which of the following is not an acidic salt?
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.
