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प्रश्न
Define the following term:
Efflorescence
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उत्तर
It is the phenomenon by which hydrated salts, on exposure to dry air, lose their water of crystallization and crumble to powder.
संबंधित प्रश्न
Identify the substance underlined, in the following case
A solid formed by reaction of two gases, one of which is acidic and the other basic in nature
Write a balanced equation for the preparation of the following salts:
Copper sulphate from Copper Carbonate.
Fill in the following blank:
Rock salt is mined just like ......................
What happens when copper sulphate crystals are heated strongly? Explain with the help of an equation.
Name three products of the chlor-alkali process. State two uses of each of these products.
What will be the colour of litmus in an aqueous solution of ammonium chloride salt?
The aqueous solution of one of the following salts will turn red litmus to blue. This salt is:
(a) potassium sulphate
(b) sodium sulphate
(c) sodium chloride
(d) potassium carbonate
The aqueous solution of one of the following salts will turn phenolphthalein indicator pink. This salt is:
(a) KCl
(b) K2SO4
(c) K2CO3
(d) KNO3
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
Which of the following salts will give an aqueous solution having pH of almost 7?
(a) NH4NO3
(b) NH4Cl
(c) CaCl2
(d) KCl
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, (NH4)2SO4
Which of salts will give:
neutral solutions?
Write the name and formula of one salt each which contains:
two molecules of water of crystallisation
How many molecules of water of crystallisation (per formula unit) are present in:
copper sulphate crystals?
Distinguish by a chemical test sodium chloride and sodium sulphide.
Sodium carbonate is a basic salt because it is a salt of a ____________.
Which of the following is not an acidic salt?
Select the correct answer from A, B, C, D and E.
A compound which in the aqueous solution state, is neutral in nature.
