Advertisements
Advertisements
Question
Define the following term:
Hygroscopy
Advertisements
Solution
It is the phenomenon by which substances absorb moisture from air, but only sufficiently so as to become wet.
RELATED QUESTIONS
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 gives a yellow residue when hot and white when cold
Give one word or a phrase:
The property by which certain hydrated salts, when left exposed to atmosphere, lose their water of crystallization and crumble into powder.
Name the salt which is used as a preservative in pickles, and in curing meat and fish.
Name the raw material used for the production of caustic soda.
What happens when copper sulphate crystals are heated strongly? Explain with the help of an equation.
Give the names and formulae of any two salts. Also name the acids and bases from which these salts may be obtained.
The salt whose aqueous solution will have no effect on either red litmus or blue litmus is ______.
A salt whose aqueous solution will have a pH of more than 7 will be ______.
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 ______.
Name a salts whose solubility increases with temperature.
Name two salts which are neutral when dissolved in water.
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?
Name the particles present in :
Strong electrolyte
Give four substances which contain water of crystallization and write their common name.
Taking sodium carbonate as an example, give the meaning of the following terms:
Water of crystallization
State what would you observe when :
Washing soda crystals are exposed to the atmosphere.
Distinguish by a chemical test sodium carbonate and sodium sulphite.
A salt that is formed by the complete neutralization of an acid and a base is called ______ salt.
What are hygroscopic substances?
