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प्रश्न
Define the following term: Efflorescence.
उत्तर
Efflorescence: It is the phenomenon by which hydrated salts on exposure to dry air, lose their water of crystallization and crumble to powder.
संबंधित प्रश्न
Write a balanced equation for the preparation of the following salts:
Zinc carbonate from Zinc sulphate
Name three chemicals made from common salt (or sodium chloride).
What name is given to the common salt which is mined from underground deposits? How was this salt formed?
What is a salt?
P and Q are aqueous solutions of sodium chloride and sodium hydroxide, respectively. Which of these will turn:
(a) blue litmus red?
P and Q are aqueous solutions of sodium chloride and sodium hydroxide, respectively. Which of these will turn:
red litmus blue?
Name a salt whose solubility decreases with temperature.
name two salts which are acidic.
Define the following term: Hygroscopy.
Taking sodium carbonate as an example, give the meaning of the following terms: Water of crystallization.
Outline the steps required to convert hydrogen chloride to anhydrous iron (III) chloride. Write the equations for the reactions.
Distinguish by a chemical test sodium hydroxide solution and ammonium hydroxide solution.
Identify the following substance:
Gas C has an offensive smell like rotten eggs.
Which of the following is not an acidic salt?
One of the constituents of baking powder is sodium hydrogencarbonate. The other constituent is :
The chemical name of plaster of Paris is ______.
The acid reacts with a base to form a neutral product called ______.
Salt is ______ in nature.
What are hygroscopic substances?
