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प्रश्न
Define the following term: Hygroscopy.
उत्तर
Hygroscopy: It is the phenomenon by which substances absorb moisture from air, but only sufficiently so as to become wet.
संबंधित प्रश्न
Write a balanced chemical equation for Action of dilute hydrochloric acid on magnesium sulphite.
Which of the following salt has a blue colour and why?
CuSO4.5H2O or CuSO4
How would you show that blue copper sulphate crystals contain water of crystallisation?
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.
What happens when a concentrated solution of sodium chloride (brine) is electrolysed? Write the equation of the reaction involved.
What is a salt?
A salt whose aqueous solution will have a pH of more than 7 will be:
(a) K2CO3
(b) K2SO4
(c) NaCl
(d) NH4Cl
Consider the following salts:
Na2CO3, NaCl, NH4Cl, CH3COONa, K2SO4, (NH4)2SO4
Which of salts will give:
neutral solutions?
name two salts which are acidic.
Taking sodium carbonate as an example, give the meaning of the following terms: Water of crystallization.
Name gases which has a sour taste.
Copy and complete the following table which refers to the action of heat on the carbonate:
| Carbonate | Colour of residue on cooling |
| Zinc Carbonate |
Which of the following is not an acidic salt?
The acid reacts with a base to form a neutral product called ______.
Acids react with metallic oxides to produce ______.
Name the salt formed when sulphuric acid is added to sodium hydroxide and write its pH.
You are provided with the list of chemicals mentioned below in the box:
| Sodium hydroxide solution, copper carbonate, zinc, hydrochloric acid, copper, dilute sulphuric acid, chlorine, iron |
Using suitable chemicals from the list given, write a balanced chemical equation for the preparation of the salt mentioned below:
Copper sulphate
Select the correct answer from A, B, C, D and E.
A compound which in the aqueous solution state, is neutral in nature.
